[imsc] fixed png uri in DECE test samples
authorplemieux
Thu, 18 Dec 2014 07:27:12 -0800
changeset 799 16fcfdffd714
parent 798 a6cb53f5e8ce
child 800 bd172bc178ae
[imsc] fixed png uri in DECE test samples
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ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track97-frag0-sample1-subs0.ttml
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ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track99-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai046_640_23_1x1_Sync_Subs_Img_SD_v7_subtitles/track3-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai047_1920_23_1x1_Sync_Subs_Img_HD_v7_subtitles/track3-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai050_854_23_426x75_Sync_Subs_Img_SD_v7_subtitles/track3-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai052_1920_23_5x75_Sync_Subs_Img_HD_v7_subtitles/track3-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai_track_selection018_v7_subtitles/track3-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai_track_selection018_v7_subtitles/track4-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai_track_selection018_v7_subtitles/track5-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai_track_selection018_v7_subtitles/track6-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/dece/Solekai_track_selection018_v7_subtitles/track7-frag0-sample1-subs0.ttml
ttml-ww-profiles/testsuite/src/convert-cff.py
ttml-ww-profiles/testsuite/src/convert-cff.xsl
--- a/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -16,20 +16,20 @@
 	</head>
 	<body>
 		
-		<div region="region1" begin="00:00:00:09" end="00:00:00:15" smpte:backgroundImage="1.png"/>
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-		<div region="region1" begin="00:00:01:21" end="00:00:01:27" smpte:backgroundImage="3.png"/>
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-		<div region="region1" begin="00:00:02:15" end="00:00:02:21" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:02:21" end="00:00:02:27" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:02:27" end="00:00:03:03" smpte:backgroundImage="5.png"/>
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-		<div region="region1" begin="00:00:03:09" end="00:00:03:15" smpte:backgroundImage="3.png"/>
+		<div region="region1" begin="00:00:00:09" end="00:00:00:15" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:00:15" end="00:00:00:21" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:00:27" end="00:00:01:03" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:01:03" end="00:00:01:09" smpte:backgroundImage="track5-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:01:09" end="00:00:01:15" smpte:backgroundImage="track5-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:01:15" end="00:00:01:21" smpte:backgroundImage="track5-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:01:21" end="00:00:01:27" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:01:27" end="00:00:02:03" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:02:03" end="00:00:02:09" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:02:09" end="00:00:02:15" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:02:15" end="00:00:02:21" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:02:21" end="00:00:02:27" smpte:backgroundImage="track5-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:02:27" end="00:00:03:03" smpte:backgroundImage="track5-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:03:03" end="00:00:03:09" smpte:backgroundImage="track5-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:03:09" end="00:00:03:15" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag1-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag1-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -17,33 +17,33 @@
 	</head>
 	<body>
 		
-		<div region="region1" begin="00:00:03:15" end="00:00:03:21" smpte:backgroundImage="1.png"/>
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-		<div region="region1" begin="00:00:04:09" end="00:00:04:15" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:04:15" end="00:00:04:21" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:04:21" end="00:00:04:27" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:04:27" end="00:00:05:03" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:05:03" end="00:00:05:09" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:05:09" end="00:00:05:15" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:05:15" end="00:00:05:21" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:05:21" end="00:00:05:27" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:05:27" end="00:00:06:03" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:06:03" end="00:00:06:09" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:06:09" end="00:00:06:15" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:06:15" end="00:00:06:23" smpte:backgroundImage="2.png"/>
+		<div region="region1" begin="00:00:03:15" end="00:00:03:21" smpte:backgroundImage="track5-frag1-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:03:21" end="00:00:03:27" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:03:27" end="00:00:04:03" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:04:03" end="00:00:04:09" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:04:09" end="00:00:04:15" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:04:15" end="00:00:04:21" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:04:21" end="00:00:04:27" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:04:27" end="00:00:05:03" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:05:03" end="00:00:05:09" smpte:backgroundImage="track5-frag1-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:05:09" end="00:00:05:15" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:05:15" end="00:00:05:21" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:05:21" end="00:00:05:27" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:05:27" end="00:00:06:03" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:06:03" end="00:00:06:09" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:06:09" end="00:00:06:15" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:06:15" end="00:00:06:23" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
 		
-		<div region="region2" begin="00:00:06:23" end="00:00:07:01" smpte:backgroundImage="1.png"/>
-		<div region="region2" begin="00:00:07:01" end="00:00:07:09" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:07:09" end="00:00:07:17" smpte:backgroundImage="3.png"/>
-		<div region="region2" begin="00:00:07:17" end="00:00:07:25" smpte:backgroundImage="4.png"/>
-		<div region="region2" begin="00:00:07:25" end="00:00:08:03" smpte:backgroundImage="5.png"/>
-		<div region="region2" begin="00:00:08:03" end="00:00:08:11" smpte:backgroundImage="4.png"/>
-		<div region="region2" begin="00:00:08:11" end="00:00:08:19" smpte:backgroundImage="3.png"/>
-		<div region="region2" begin="00:00:08:19" end="00:00:08:27" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:08:27" end="00:00:09:05" smpte:backgroundImage="1.png"/>
-		<div region="region2" begin="00:00:09:05" end="00:00:09:13" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:09:13" end="00:00:09:21" smpte:backgroundImage="3.png"/>
+		<div region="region2" begin="00:00:06:23" end="00:00:07:01" smpte:backgroundImage="track5-frag1-sample1-subs1.png"/>
+		<div region="region2" begin="00:00:07:01" end="00:00:07:09" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:07:09" end="00:00:07:17" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region2" begin="00:00:07:17" end="00:00:07:25" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region2" begin="00:00:07:25" end="00:00:08:03" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region2" begin="00:00:08:03" end="00:00:08:11" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region2" begin="00:00:08:11" end="00:00:08:19" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region2" begin="00:00:08:19" end="00:00:08:27" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:08:27" end="00:00:09:05" smpte:backgroundImage="track5-frag1-sample1-subs1.png"/>
+		<div region="region2" begin="00:00:09:05" end="00:00:09:13" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:09:13" end="00:00:09:21" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag2-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag2-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -19,24 +19,24 @@
 	</head>
 	<body tts:backgroundColor="silver">
 		
-		<div region="Quad1" begin="00:00:10:05" end="00:00:11:09" smpte:backgroundImage="1.png"/>
-		<div region="Quad2" begin="00:00:10:11" end="00:00:11:19" smpte:backgroundImage="2.png"/>
-		<div region="Quad3" begin="00:00:10:19" end="00:00:11:29" smpte:backgroundImage="3.png"/>
-		<div region="Quad4" begin="00:00:10:29" end="00:00:12:09" smpte:backgroundImage="4.png"/>
+		<div region="Quad1" begin="00:00:10:05" end="00:00:11:09" smpte:backgroundImage="track5-frag2-sample1-subs1.png"/>
+		<div region="Quad2" begin="00:00:10:11" end="00:00:11:19" smpte:backgroundImage="track5-frag2-sample1-subs2.png"/>
+		<div region="Quad3" begin="00:00:10:19" end="00:00:11:29" smpte:backgroundImage="track5-frag2-sample1-subs3.png"/>
+		<div region="Quad4" begin="00:00:10:29" end="00:00:12:09" smpte:backgroundImage="track5-frag2-sample1-subs4.png"/>
 		
-		<div region="Quad1" begin="00:00:11:09" end="00:00:12:19" smpte:backgroundImage="5.png"/>
-		<div region="Quad2" begin="00:00:11:19" end="00:00:12:29" smpte:backgroundImage="6.png"/>
-		<div region="Quad3" begin="00:00:11:29" end="00:00:13:09" smpte:backgroundImage="7.png"/>
-		<div region="Quad4" begin="00:00:12:09" end="00:00:13:19" smpte:backgroundImage="8.png"/>
+		<div region="Quad1" begin="00:00:11:09" end="00:00:12:19" smpte:backgroundImage="track5-frag2-sample1-subs5.png"/>
+		<div region="Quad2" begin="00:00:11:19" end="00:00:12:29" smpte:backgroundImage="track5-frag2-sample1-subs6.png"/>
+		<div region="Quad3" begin="00:00:11:29" end="00:00:13:09" smpte:backgroundImage="track5-frag2-sample1-subs7.png"/>
+		<div region="Quad4" begin="00:00:12:09" end="00:00:13:19" smpte:backgroundImage="track5-frag2-sample1-subs8.png"/>
 		
-		<div region="Quad1" begin="00:00:12:19" end="00:00:13:29" smpte:backgroundImage="1.png"/>
-		<div region="Quad2" begin="00:00:12:29" end="00:00:14:09" smpte:backgroundImage="2.png"/>
-		<div region="Quad3" begin="00:00:13:09" end="00:00:14:19" smpte:backgroundImage="3.png"/>
-		<div region="Quad4" begin="00:00:13:19" end="00:00:14:19" smpte:backgroundImage="4.png"/>
+		<div region="Quad1" begin="00:00:12:19" end="00:00:13:29" smpte:backgroundImage="track5-frag2-sample1-subs1.png"/>
+		<div region="Quad2" begin="00:00:12:29" end="00:00:14:09" smpte:backgroundImage="track5-frag2-sample1-subs2.png"/>
+		<div region="Quad3" begin="00:00:13:09" end="00:00:14:19" smpte:backgroundImage="track5-frag2-sample1-subs3.png"/>
+		<div region="Quad4" begin="00:00:13:19" end="00:00:14:19" smpte:backgroundImage="track5-frag2-sample1-subs4.png"/>
 		
-		<div region="Quad1" begin="00:00:13:29" end="00:00:14:29" smpte:backgroundImage="5.png"/>
-		<div region="Quad2" begin="00:00:14:09" end="00:00:14:29" smpte:backgroundImage="6.png"/>
-		<div region="Quad3" begin="00:00:14:19" end="00:00:14:29" smpte:backgroundImage="7.png"/>
-		<div region="Quad4" begin="00:00:14:19" end="00:00:14:29" smpte:backgroundImage="8.png"/>
+		<div region="Quad1" begin="00:00:13:29" end="00:00:14:29" smpte:backgroundImage="track5-frag2-sample1-subs5.png"/>
+		<div region="Quad2" begin="00:00:14:09" end="00:00:14:29" smpte:backgroundImage="track5-frag2-sample1-subs6.png"/>
+		<div region="Quad3" begin="00:00:14:19" end="00:00:14:29" smpte:backgroundImage="track5-frag2-sample1-subs7.png"/>
+		<div region="Quad4" begin="00:00:14:19" end="00:00:14:29" smpte:backgroundImage="track5-frag2-sample1-subs8.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag3-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag3-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -19,19 +19,19 @@
 	</head>
 	<body tts:backgroundColor="blue" tts:showBackground="whenActive">
 		
-		<div region="Quad1" begin="00:00:15:09" end="00:00:16:19" tts:backgroundColor="fuchsia" smpte:backgroundImage="1.png"/>
-		<div region="Quad2" begin="00:00:15:19" end="00:00:16:29" tts:backgroundColor="fuchsia" smpte:backgroundImage="2.png"/>
-		<div region="Quad3" begin="00:00:15:29" end="00:00:17:09" tts:backgroundColor="fuchsia" smpte:backgroundImage="3.png"/>
-		<div region="Quad4" begin="00:00:16:09" end="00:00:17:19" tts:backgroundColor="fuchsia" smpte:backgroundImage="4.png"/>
+		<div region="Quad1" begin="00:00:15:09" end="00:00:16:19" tts:backgroundColor="fuchsia" smpte:backgroundImage="track5-frag3-sample1-subs1.png"/>
+		<div region="Quad2" begin="00:00:15:19" end="00:00:16:29" tts:backgroundColor="fuchsia" smpte:backgroundImage="track5-frag3-sample1-subs2.png"/>
+		<div region="Quad3" begin="00:00:15:29" end="00:00:17:09" tts:backgroundColor="fuchsia" smpte:backgroundImage="track5-frag3-sample1-subs3.png"/>
+		<div region="Quad4" begin="00:00:16:09" end="00:00:17:19" tts:backgroundColor="fuchsia" smpte:backgroundImage="track5-frag3-sample1-subs4.png"/>
 		
-		<div region="Quad1" begin="00:00:16:19" end="00:00:17:29" tts:backgroundColor="black" smpte:backgroundImage="5.png"/>
-		<div region="Quad2" begin="00:00:16:29" end="00:00:18:09" tts:backgroundColor="white" smpte:backgroundImage="6.png"/>
-		<div region="Quad3" begin="00:00:17:09" end="00:00:18:19" tts:backgroundColor="navy" smpte:backgroundImage="7.png"/>
-		<div region="Quad4" begin="00:00:17:19" end="00:00:18:29" tts:backgroundColor="yellow" smpte:backgroundImage="8.png"/>
+		<div region="Quad1" begin="00:00:16:19" end="00:00:17:29" tts:backgroundColor="black" smpte:backgroundImage="track5-frag3-sample1-subs5.png"/>
+		<div region="Quad2" begin="00:00:16:29" end="00:00:18:09" tts:backgroundColor="white" smpte:backgroundImage="track5-frag3-sample1-subs6.png"/>
+		<div region="Quad3" begin="00:00:17:09" end="00:00:18:19" tts:backgroundColor="navy" smpte:backgroundImage="track5-frag3-sample1-subs7.png"/>
+		<div region="Quad4" begin="00:00:17:19" end="00:00:18:29" tts:backgroundColor="yellow" smpte:backgroundImage="track5-frag3-sample1-subs8.png"/>
 		
-		<div region="Quad1" begin="00:00:17:29" end="00:00:19:29" tts:backgroundColor="black" smpte:backgroundImage="1.png"/>
-		<div region="Quad2" begin="00:00:18:09" end="00:00:19:29" tts:backgroundColor="white" smpte:backgroundImage="2.png"/>
-		<div region="Quad3" begin="00:00:18:19" end="00:00:19:29" tts:backgroundColor="navy" smpte:backgroundImage="3.png"/>
-		<div region="Quad4" begin="00:00:18:29" end="00:00:19:29" tts:backgroundColor="yellow" smpte:backgroundImage="4.png"/>
+		<div region="Quad1" begin="00:00:17:29" end="00:00:19:29" tts:backgroundColor="black" smpte:backgroundImage="track5-frag3-sample1-subs1.png"/>
+		<div region="Quad2" begin="00:00:18:09" end="00:00:19:29" tts:backgroundColor="white" smpte:backgroundImage="track5-frag3-sample1-subs2.png"/>
+		<div region="Quad3" begin="00:00:18:19" end="00:00:19:29" tts:backgroundColor="navy" smpte:backgroundImage="track5-frag3-sample1-subs3.png"/>
+		<div region="Quad4" begin="00:00:18:29" end="00:00:19:29" tts:backgroundColor="yellow" smpte:backgroundImage="track5-frag3-sample1-subs4.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag4-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag4-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -15,28 +15,28 @@
 		</layout>
 	</head>
 	<body tts:showBackground="whenActive">
-		<div region="region1" begin="00:00:20:05" end="00:00:20:11" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:20:11" end="00:00:20:17" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:20:17" end="00:00:20:23" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:23" end="00:00:20:29" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:20:29" end="00:00:21:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:21:05" end="00:00:21:11" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:21:11" end="00:00:21:17" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:21:17" end="00:00:21:23" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:21:23" end="00:00:21:29" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:21:29" end="00:00:22:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:22:05" end="00:00:22:11" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:22:11" end="00:00:22:17" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:22:17" end="00:00:22:23" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:22:23" end="00:00:22:29" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:22:29" end="00:00:23:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:23:05" end="00:00:23:11" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:23:11" end="00:00:23:17" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:23:17" end="00:00:23:23" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:23:23" end="00:00:23:29" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:23:29" end="00:00:24:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:24:05" end="00:00:24:11" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:24:11" end="00:00:24:17" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:24:17" end="00:00:24:23" smpte:backgroundImage="3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:20:11" smpte:backgroundImage="track5-frag4-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:20:11" end="00:00:20:17" smpte:backgroundImage="track5-frag4-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:20:17" end="00:00:20:23" smpte:backgroundImage="track5-frag4-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:23" end="00:00:20:29" smpte:backgroundImage="track5-frag4-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:20:29" end="00:00:21:05" smpte:backgroundImage="track5-frag4-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:21:05" end="00:00:21:11" smpte:backgroundImage="track5-frag4-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:21:11" end="00:00:21:17" smpte:backgroundImage="track5-frag4-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:21:17" end="00:00:21:23" smpte:backgroundImage="track5-frag4-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:21:23" end="00:00:21:29" smpte:backgroundImage="track5-frag4-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:21:29" end="00:00:22:05" smpte:backgroundImage="track5-frag4-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:22:05" end="00:00:22:11" smpte:backgroundImage="track5-frag4-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:22:11" end="00:00:22:17" smpte:backgroundImage="track5-frag4-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:22:17" end="00:00:22:23" smpte:backgroundImage="track5-frag4-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:22:23" end="00:00:22:29" smpte:backgroundImage="track5-frag4-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:22:29" end="00:00:23:05" smpte:backgroundImage="track5-frag4-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:23:05" end="00:00:23:11" smpte:backgroundImage="track5-frag4-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:23:11" end="00:00:23:17" smpte:backgroundImage="track5-frag4-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:23:17" end="00:00:23:23" smpte:backgroundImage="track5-frag4-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:23:23" end="00:00:23:29" smpte:backgroundImage="track5-frag4-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:23:29" end="00:00:24:05" smpte:backgroundImage="track5-frag4-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:24:05" end="00:00:24:11" smpte:backgroundImage="track5-frag4-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:24:11" end="00:00:24:17" smpte:backgroundImage="track5-frag4-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:24:17" end="00:00:24:23" smpte:backgroundImage="track5-frag4-sample1-subs3.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag5-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai022_854_29_640x75_MaxSdSubtitle_v7_subtitles/track5-frag5-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -17,25 +17,25 @@
 	</head>
 	<body tts:showBackground="whenActive">
 		
-		<div region="region2" begin="00:00:25:01" end="00:00:25:07" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:25:07" end="00:00:25:15" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:25:15" end="00:00:25:21" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:25:21" end="00:00:25:29" smpte:backgroundImage="4.png"/>
-		<div region="region2" begin="00:00:25:29" end="00:00:26:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:26:05" end="00:00:26:13" smpte:backgroundImage="4.png"/>
-		<div region="region2" begin="00:00:26:13" end="00:00:26:19" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:26:19" end="00:00:26:27" smpte:backgroundImage="2.png"/>
+		<div region="region2" begin="00:00:25:01" end="00:00:25:07" smpte:backgroundImage="track5-frag5-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:25:07" end="00:00:25:15" smpte:backgroundImage="track5-frag5-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:25:15" end="00:00:25:21" smpte:backgroundImage="track5-frag5-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:25:21" end="00:00:25:29" smpte:backgroundImage="track5-frag5-sample1-subs4.png"/>
+		<div region="region2" begin="00:00:25:29" end="00:00:26:05" smpte:backgroundImage="track5-frag5-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:26:05" end="00:00:26:13" smpte:backgroundImage="track5-frag5-sample1-subs4.png"/>
+		<div region="region2" begin="00:00:26:13" end="00:00:26:19" smpte:backgroundImage="track5-frag5-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:26:19" end="00:00:26:27" smpte:backgroundImage="track5-frag5-sample1-subs2.png"/>
 		
-		<div region="region1" begin="00:00:26:27" end="00:00:27:03" tts:backgroundColor="fuchsia" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:27:03" end="00:00:27:13" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:27:13" end="00:00:27:21" tts:backgroundColor="yellow" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:27:21" end="00:00:28:01" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:28:01" end="00:00:28:09" tts:backgroundColor="cyan" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:28:09" end="00:00:28:19" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:28:19" end="00:00:28:27" tts:backgroundColor="yellow" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:28:27" end="00:00:29:07" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:29:07" end="00:00:29:15" tts:backgroundColor="fuchsia" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:29:15" end="00:00:29:25" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:29:25" end="00:00:29:29" tts:backgroundColor="yellow" smpte:backgroundImage="3.png"/>
+		<div region="region1" begin="00:00:26:27" end="00:00:27:03" tts:backgroundColor="fuchsia" smpte:backgroundImage="track5-frag5-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:27:03" end="00:00:27:13" smpte:backgroundImage="track5-frag5-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:27:13" end="00:00:27:21" tts:backgroundColor="yellow" smpte:backgroundImage="track5-frag5-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:27:21" end="00:00:28:01" smpte:backgroundImage="track5-frag5-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:28:01" end="00:00:28:09" tts:backgroundColor="cyan" smpte:backgroundImage="track5-frag5-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:28:09" end="00:00:28:19" smpte:backgroundImage="track5-frag5-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:28:19" end="00:00:28:27" tts:backgroundColor="yellow" smpte:backgroundImage="track5-frag5-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:28:27" end="00:00:29:07" smpte:backgroundImage="track5-frag5-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:29:07" end="00:00:29:15" tts:backgroundColor="fuchsia" smpte:backgroundImage="track5-frag5-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:29:15" end="00:00:29:25" smpte:backgroundImage="track5-frag5-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:29:25" end="00:00:29:29" tts:backgroundColor="yellow" smpte:backgroundImage="track5-frag5-sample1-subs3.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai023_1920_23_1x1_MaxHdSubtitle_v7_subtitles/track5-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai023_1920_23_1x1_MaxHdSubtitle_v7_subtitles/track5-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -17,30 +17,30 @@
 	<body>
 		
 		
-		<div region="region1" begin="00:00:00:02" end="00:00:00:06" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:00:06" end="00:00:00:10" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:00:10" end="00:00:00:14" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:00:14" end="00:00:00:18" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:00:18" end="00:00:00:22" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:00:22" end="00:00:01:02" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:01:02" end="00:00:01:06" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:01:06" end="00:00:01:10" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:01:10" end="00:00:01:14" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:01:14" end="00:00:01:18" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:01:18" end="00:00:01:22" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:01:22" end="00:00:02:02" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:02:02" end="00:00:02:06" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:02:06" end="00:00:02:10" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:02:10" end="00:00:02:14" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:02:14" end="00:00:02:18" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:02:18" end="00:00:02:22" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:02:22" end="00:00:03:02" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:03:02" end="00:00:03:06" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:03:06" end="00:00:03:10" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:03:10" end="00:00:03:14" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:03:14" end="00:00:03:18" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:03:18" end="00:00:03:22" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:03:22" end="00:00:04:02" smpte:backgroundImage="2.png"/>
+		<div region="region1" begin="00:00:00:02" end="00:00:00:06" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:00:06" end="00:00:00:10" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:00:10" end="00:00:00:14" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:00:14" end="00:00:00:18" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:00:18" end="00:00:00:22" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:00:22" end="00:00:01:02" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:01:02" end="00:00:01:06" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:01:06" end="00:00:01:10" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:01:10" end="00:00:01:14" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:01:14" end="00:00:01:18" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:01:18" end="00:00:01:22" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:01:22" end="00:00:02:02" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:02:02" end="00:00:02:06" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:02:06" end="00:00:02:10" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:02:10" end="00:00:02:14" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:02:14" end="00:00:02:18" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:02:18" end="00:00:02:22" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:02:22" end="00:00:03:02" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:03:02" end="00:00:03:06" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:03:06" end="00:00:03:10" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:03:10" end="00:00:03:14" smpte:backgroundImage="track5-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:03:14" end="00:00:03:18" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:03:18" end="00:00:03:22" smpte:backgroundImage="track5-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:03:22" end="00:00:04:02" smpte:backgroundImage="track5-frag0-sample1-subs2.png"/>
 
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai023_1920_23_1x1_MaxHdSubtitle_v7_subtitles/track5-frag1-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai023_1920_23_1x1_MaxHdSubtitle_v7_subtitles/track5-frag1-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -21,56 +21,56 @@
 		
 		
 		
-		<div region="region2" begin="00:00:04:05" end="00:00:04:08" smpte:backgroundImage="1.png"/>
-		<div region="region2" begin="00:00:04:08" end="00:00:04:11" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:04:11" end="00:00:04:14" smpte:backgroundImage="3.png"/>
-		<div region="region2" begin="00:00:04:14" end="00:00:04:17" smpte:backgroundImage="4.png"/>
-		<div region="region2" begin="00:00:04:17" end="00:00:04:20" smpte:backgroundImage="3.png"/>
-		<div region="region2" begin="00:00:04:20" end="00:00:04:23" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:04:23" end="00:00:05:02" smpte:backgroundImage="1.png"/>
-		<div region="region2" begin="00:00:05:02" end="00:00:05:05" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:05:05" end="00:00:05:08" smpte:backgroundImage="3.png"/>
-		<div region="region2" begin="00:00:05:08" end="00:00:05:11" smpte:backgroundImage="4.png"/>
-		<div region="region2" begin="00:00:05:11" end="00:00:05:14" smpte:backgroundImage="3.png"/>
-		<div region="region2" begin="00:00:05:14" end="00:00:05:17" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:05:17" end="00:00:05:20" smpte:backgroundImage="1.png"/>
+		<div region="region2" begin="00:00:04:05" end="00:00:04:08" smpte:backgroundImage="track5-frag1-sample1-subs1.png"/>
+		<div region="region2" begin="00:00:04:08" end="00:00:04:11" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:04:11" end="00:00:04:14" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region2" begin="00:00:04:14" end="00:00:04:17" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region2" begin="00:00:04:17" end="00:00:04:20" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region2" begin="00:00:04:20" end="00:00:04:23" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:04:23" end="00:00:05:02" smpte:backgroundImage="track5-frag1-sample1-subs1.png"/>
+		<div region="region2" begin="00:00:05:02" end="00:00:05:05" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:05:05" end="00:00:05:08" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region2" begin="00:00:05:08" end="00:00:05:11" smpte:backgroundImage="track5-frag1-sample1-subs4.png"/>
+		<div region="region2" begin="00:00:05:11" end="00:00:05:14" smpte:backgroundImage="track5-frag1-sample1-subs3.png"/>
+		<div region="region2" begin="00:00:05:14" end="00:00:05:17" smpte:backgroundImage="track5-frag1-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:05:17" end="00:00:05:20" smpte:backgroundImage="track5-frag1-sample1-subs1.png"/>
 		
 		
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:05:20" end="00:00:05:23" smpte:backgroundImage="5.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:05:23" end="00:00:06:02" smpte:backgroundImage="6.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:02" end="00:00:06:05" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:05" end="00:00:06:08" smpte:backgroundImage="8.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:08" end="00:00:06:11" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:11" end="00:00:06:14" smpte:backgroundImage="6.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:14" end="00:00:06:17" smpte:backgroundImage="5.png"/>
-		
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:06:17" end="00:00:06:20" smpte:backgroundImage="5.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:06:20" end="00:00:06:23" smpte:backgroundImage="6.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:06:23" end="00:00:07:02" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:02" end="00:00:07:05" smpte:backgroundImage="8.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:05" end="00:00:07:08" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:08" end="00:00:07:11" smpte:backgroundImage="6.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:11" end="00:00:07:14" smpte:backgroundImage="5.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:05:20" end="00:00:05:23" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:05:23" end="00:00:06:02" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:02" end="00:00:06:05" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:05" end="00:00:06:08" smpte:backgroundImage="track5-frag1-sample1-subs8.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:08" end="00:00:06:11" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:11" end="00:00:06:14" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:06:14" end="00:00:06:17" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
 		
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:14" end="00:00:07:17" smpte:backgroundImage="5.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:17" end="00:00:07:20" smpte:backgroundImage="6.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:20" end="00:00:07:23" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:23" end="00:00:08:02" smpte:backgroundImage="8.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:08:02" end="00:00:08:05" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="yellow" begin="00:00:08:05" end="00:00:08:08" smpte:backgroundImage="6.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:06:17" end="00:00:06:20" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:06:20" end="00:00:06:23" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:06:23" end="00:00:07:02" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:02" end="00:00:07:05" smpte:backgroundImage="track5-frag1-sample1-subs8.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:05" end="00:00:07:08" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:08" end="00:00:07:11" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:07:11" end="00:00:07:14" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
 		
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:08" end="00:00:08:11" smpte:backgroundImage="5.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:11" end="00:00:08:14" smpte:backgroundImage="6.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:14" end="00:00:08:17" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:17" end="00:00:08:20" smpte:backgroundImage="8.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:20" end="00:00:08:23" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:23" end="00:00:09:02" smpte:backgroundImage="6.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:14" end="00:00:07:17" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:17" end="00:00:07:20" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:20" end="00:00:07:23" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:07:23" end="00:00:08:02" smpte:backgroundImage="track5-frag1-sample1-subs8.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:08:02" end="00:00:08:05" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="yellow" begin="00:00:08:05" end="00:00:08:08" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
 		
-		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:02" end="00:00:09:05" smpte:backgroundImage="5.png"/>
-		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:05" end="00:00:09:08" smpte:backgroundImage="6.png"/>
-		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:08" end="00:00:09:11" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:11" end="00:00:09:14" smpte:backgroundImage="8.png"/>
-		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:14" end="00:00:09:17" smpte:backgroundImage="7.png"/>
-		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:20" end="00:00:09:23" smpte:backgroundImage="6.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:08" end="00:00:08:11" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:11" end="00:00:08:14" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:14" end="00:00:08:17" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:17" end="00:00:08:20" smpte:backgroundImage="track5-frag1-sample1-subs8.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:20" end="00:00:08:23" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="blue" begin="00:00:08:23" end="00:00:09:02" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		
+		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:02" end="00:00:09:05" smpte:backgroundImage="track5-frag1-sample1-subs5.png"/>
+		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:05" end="00:00:09:08" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
+		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:08" end="00:00:09:11" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:11" end="00:00:09:14" smpte:backgroundImage="track5-frag1-sample1-subs8.png"/>
+		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:14" end="00:00:09:17" smpte:backgroundImage="track5-frag1-sample1-subs7.png"/>
+		<div region="region3" tts:backgroundColor="transparent" begin="00:00:09:20" end="00:00:09:23" smpte:backgroundImage="track5-frag1-sample1-subs6.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai023_1920_23_1x1_MaxHdSubtitle_v7_subtitles/track5-frag2-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai023_1920_23_1x1_MaxHdSubtitle_v7_subtitles/track5-frag2-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -21,38 +21,38 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:10:04" end="00:00:10:08" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:08" end="00:00:10:12" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:10:12" end="00:00:10:16" smpte:backgroundImage="3.png"/>
-		
-		<div region="region2" begin="00:00:10:16" end="00:00:10:20" smpte:backgroundImage="1.png"/>
-		<div region="region2" begin="00:00:10:20" end="00:00:11:00" smpte:backgroundImage="2.png"/>
-		<div region="region2" begin="00:00:11:00" end="00:00:11:03" smpte:backgroundImage="3.png"/>
+		<div region="region1" begin="00:00:10:04" end="00:00:10:08" smpte:backgroundImage="track5-frag2-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:08" end="00:00:10:12" smpte:backgroundImage="track5-frag2-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:10:12" end="00:00:10:16" smpte:backgroundImage="track5-frag2-sample1-subs3.png"/>
 		
-		<div region="region3" begin="00:00:11:03" end="00:00:11:06" tts:backgroundColor="red" smpte:backgroundImage="4.png"/>
-		<div region="region3" begin="00:00:11:06" end="00:00:11:09" smpte:backgroundImage="5.png"/>
-		<div region="region3" begin="00:00:11:09" end="00:00:11:12" tts:backgroundColor="black" smpte:backgroundImage="6.png"/>
-		<div region="region3" begin="00:00:11:12" end="00:00:11:15" smpte:backgroundImage="4.png"/>
-		<div region="region3" begin="00:00:11:15" end="00:00:11:18" tts:backgroundColor="red" smpte:backgroundImage="5.png"/>
-		<div region="region3" begin="00:00:11:18" end="00:00:11:21" smpte:backgroundImage="6.png"/>
-		<div region="region3" begin="00:00:11:21" end="00:00:12:00" tts:backgroundColor="black" smpte:backgroundImage="4.png"/>
-		<div region="region3" begin="00:00:12:00" end="00:00:12:03" tts:backgroundColor="red" smpte:backgroundImage="5.png"/>
-		<div region="region3" begin="00:00:12:03" end="00:00:12:06" tts:backgroundColor="black" smpte:backgroundImage="6.png"/>
-		<div region="region3" begin="00:00:12:06" end="00:00:12:09" tts:backgroundColor="red" smpte:backgroundImage="4.png"/>
-		<div region="region3" begin="00:00:12:09" end="00:00:12:12" tts:backgroundColor="black" smpte:backgroundImage="5.png"/>
-		<div region="region3" begin="00:00:12:12" end="00:00:12:16" tts:backgroundColor="red" smpte:backgroundImage="6.png"/>
+		<div region="region2" begin="00:00:10:16" end="00:00:10:20" smpte:backgroundImage="track5-frag2-sample1-subs1.png"/>
+		<div region="region2" begin="00:00:10:20" end="00:00:11:00" smpte:backgroundImage="track5-frag2-sample1-subs2.png"/>
+		<div region="region2" begin="00:00:11:00" end="00:00:11:03" smpte:backgroundImage="track5-frag2-sample1-subs3.png"/>
 		
-		<div region="Quad1" tts:backgroundColor="blue" begin="00:00:12:16" end="00:00:13:13" smpte:backgroundImage="7.png"/>
-		<div region="Quad2" tts:backgroundColor="white" begin="00:00:12:20" end="00:00:13:19" smpte:backgroundImage="8.png"/>
-		<div region="Quad3" tts:backgroundColor="yellow" begin="00:00:13:01" end="00:00:14:01" smpte:backgroundImage="9.png"/>
-		<div region="Quad4" tts:backgroundColor="green" begin="00:00:13:07" end="00:00:14:07" smpte:backgroundImage="10.png"/>
-		<div region="Quad1" tts:backgroundColor="blue" begin="00:00:13:13" end="00:00:13:19" smpte:backgroundImage="11.png"/>
-		<div region="Quad1" tts:backgroundColor="blue" begin="00:00:13:19" end="00:00:14:22" smpte:backgroundImage="7.png"/>
-		<div region="Quad2" tts:backgroundColor="white" begin="00:00:13:19" end="00:00:14:01" smpte:backgroundImage="11.png"/>
-		<div region="Quad3" tts:backgroundColor="yellow" begin="00:00:14:01" end="00:00:14:07" smpte:backgroundImage="11.png"/>
-		<div region="Quad2" tts:backgroundColor="white" begin="00:00:14:01" end="00:00:14:22" smpte:backgroundImage="8.png"/>
-		<div region="Quad3" tts:backgroundColor="yellow" begin="00:00:14:07" end="00:00:14:22" smpte:backgroundImage="9.png"/>
-		<div region="Quad4" tts:backgroundColor="green" begin="00:00:14:07" end="00:00:14:13" smpte:backgroundImage="11.png"/>
-		<div region="Quad4" tts:backgroundColor="green" begin="00:00:14:13" end="00:00:14:22" smpte:backgroundImage="10.png"/>
+		<div region="region3" begin="00:00:11:03" end="00:00:11:06" tts:backgroundColor="red" smpte:backgroundImage="track5-frag2-sample1-subs4.png"/>
+		<div region="region3" begin="00:00:11:06" end="00:00:11:09" smpte:backgroundImage="track5-frag2-sample1-subs5.png"/>
+		<div region="region3" begin="00:00:11:09" end="00:00:11:12" tts:backgroundColor="black" smpte:backgroundImage="track5-frag2-sample1-subs6.png"/>
+		<div region="region3" begin="00:00:11:12" end="00:00:11:15" smpte:backgroundImage="track5-frag2-sample1-subs4.png"/>
+		<div region="region3" begin="00:00:11:15" end="00:00:11:18" tts:backgroundColor="red" smpte:backgroundImage="track5-frag2-sample1-subs5.png"/>
+		<div region="region3" begin="00:00:11:18" end="00:00:11:21" smpte:backgroundImage="track5-frag2-sample1-subs6.png"/>
+		<div region="region3" begin="00:00:11:21" end="00:00:12:00" tts:backgroundColor="black" smpte:backgroundImage="track5-frag2-sample1-subs4.png"/>
+		<div region="region3" begin="00:00:12:00" end="00:00:12:03" tts:backgroundColor="red" smpte:backgroundImage="track5-frag2-sample1-subs5.png"/>
+		<div region="region3" begin="00:00:12:03" end="00:00:12:06" tts:backgroundColor="black" smpte:backgroundImage="track5-frag2-sample1-subs6.png"/>
+		<div region="region3" begin="00:00:12:06" end="00:00:12:09" tts:backgroundColor="red" smpte:backgroundImage="track5-frag2-sample1-subs4.png"/>
+		<div region="region3" begin="00:00:12:09" end="00:00:12:12" tts:backgroundColor="black" smpte:backgroundImage="track5-frag2-sample1-subs5.png"/>
+		<div region="region3" begin="00:00:12:12" end="00:00:12:16" tts:backgroundColor="red" smpte:backgroundImage="track5-frag2-sample1-subs6.png"/>
+		
+		<div region="Quad1" tts:backgroundColor="blue" begin="00:00:12:16" end="00:00:13:13" smpte:backgroundImage="track5-frag2-sample1-subs7.png"/>
+		<div region="Quad2" tts:backgroundColor="white" begin="00:00:12:20" end="00:00:13:19" smpte:backgroundImage="track5-frag2-sample1-subs8.png"/>
+		<div region="Quad3" tts:backgroundColor="yellow" begin="00:00:13:01" end="00:00:14:01" smpte:backgroundImage="track5-frag2-sample1-subs9.png"/>
+		<div region="Quad4" tts:backgroundColor="green" begin="00:00:13:07" end="00:00:14:07" smpte:backgroundImage="track5-frag2-sample1-subs10.png"/>
+		<div region="Quad1" tts:backgroundColor="blue" begin="00:00:13:13" end="00:00:13:19" smpte:backgroundImage="track5-frag2-sample1-subs11.png"/>
+		<div region="Quad1" tts:backgroundColor="blue" begin="00:00:13:19" end="00:00:14:22" smpte:backgroundImage="track5-frag2-sample1-subs7.png"/>
+		<div region="Quad2" tts:backgroundColor="white" begin="00:00:13:19" end="00:00:14:01" smpte:backgroundImage="track5-frag2-sample1-subs11.png"/>
+		<div region="Quad3" tts:backgroundColor="yellow" begin="00:00:14:01" end="00:00:14:07" smpte:backgroundImage="track5-frag2-sample1-subs11.png"/>
+		<div region="Quad2" tts:backgroundColor="white" begin="00:00:14:01" end="00:00:14:22" smpte:backgroundImage="track5-frag2-sample1-subs8.png"/>
+		<div region="Quad3" tts:backgroundColor="yellow" begin="00:00:14:07" end="00:00:14:22" smpte:backgroundImage="track5-frag2-sample1-subs9.png"/>
+		<div region="Quad4" tts:backgroundColor="green" begin="00:00:14:07" end="00:00:14:13" smpte:backgroundImage="track5-frag2-sample1-subs11.png"/>
+		<div region="Quad4" tts:backgroundColor="green" begin="00:00:14:13" end="00:00:14:22" smpte:backgroundImage="track5-frag2-sample1-subs10.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track10-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track10-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track10-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track10-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track10-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track10-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track10-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track10-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track10-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track10-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track10-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track10-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track10-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track100-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track100-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track100-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track100-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track100-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track100-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track100-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track100-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track100-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track100-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track100-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track100-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track100-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track101-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track101-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track101-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track101-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track101-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track101-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track101-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track101-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track101-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track101-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track101-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track101-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track101-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track102-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track102-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track102-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track102-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track102-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track102-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track102-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track102-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track102-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track102-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track102-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track102-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track102-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track103-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track103-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track103-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track103-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track103-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track103-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track103-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track103-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track103-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track103-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track103-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track103-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track103-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track104-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track104-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track104-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track104-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track104-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track104-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track104-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track104-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track104-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track104-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track104-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track104-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track104-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track105-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track105-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track105-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track105-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track105-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track105-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track105-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track105-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track105-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track105-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track105-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track105-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track105-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track106-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track106-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track106-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track106-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track106-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track106-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track106-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track106-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track106-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track106-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track106-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track106-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track106-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track107-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track107-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track107-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track107-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track107-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track107-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track107-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track107-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track107-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track107-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track107-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track107-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track107-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track108-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track108-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
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-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
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-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track108-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track108-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track108-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track108-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track108-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track108-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track108-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track108-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track108-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track108-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track108-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track109-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track109-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
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-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track109-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track109-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track109-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track109-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track109-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track109-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track109-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track109-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track109-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track109-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track109-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track11-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track11-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track11-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track11-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track11-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track11-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track11-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track11-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track11-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track11-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track11-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track11-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track11-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track110-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track110-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track110-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track110-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track110-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track110-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track110-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track110-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track110-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track110-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track110-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track110-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track110-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track111-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track111-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track111-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track111-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track111-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track111-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track111-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track111-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track111-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track111-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track111-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track111-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track111-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track112-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track112-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track112-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track112-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track112-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track112-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track112-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track112-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track112-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track112-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track112-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track112-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track112-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track113-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track113-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
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-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track113-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track113-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track113-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track113-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track113-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track113-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track113-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track113-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track113-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track113-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track113-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track114-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track114-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track114-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track114-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track114-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track114-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track114-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track114-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track114-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track114-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track114-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track114-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track114-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track115-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track115-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track115-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track115-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track115-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track115-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track115-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track115-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track115-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track115-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track115-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track115-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track115-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track116-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track116-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track116-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track116-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track116-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track116-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track116-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track116-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track116-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track116-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track116-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track116-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track116-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track117-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track117-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track117-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track117-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track117-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track117-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track117-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track117-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track117-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track117-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track117-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track117-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track117-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track118-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track118-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track118-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track118-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track118-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track118-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track118-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track118-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track118-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track118-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track118-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track118-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track118-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track119-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track119-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track119-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track119-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track119-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track119-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track119-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track119-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track119-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track119-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track119-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track119-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track119-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track12-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track12-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track12-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track12-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track12-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track12-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track12-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track12-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track12-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track12-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track12-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track12-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track12-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track120-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track120-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track120-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track120-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track120-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track120-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track120-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track120-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track120-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track120-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track120-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track120-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track120-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track121-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track121-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track121-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track121-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track121-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track121-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track121-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track121-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track121-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track121-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track121-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track121-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track121-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track122-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track122-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track122-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track122-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track122-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track122-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track122-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track122-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track122-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track122-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track122-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track122-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track122-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track123-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track123-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track123-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track123-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track123-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track123-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track123-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track123-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track123-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track123-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track123-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track123-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track123-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track124-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track124-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track124-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track124-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track124-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track124-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track124-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track124-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track124-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track124-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track124-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track124-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track124-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track125-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track125-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track125-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track125-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track125-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track125-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track125-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track125-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track125-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track125-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track125-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track125-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track125-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track126-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track126-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track126-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track126-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track126-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track126-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track126-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track126-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track126-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track126-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track126-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track126-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track126-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track127-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track127-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track127-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track127-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track127-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track127-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track127-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track127-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track127-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track127-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track127-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track127-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track127-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track128-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track128-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track128-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track128-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track128-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track128-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track128-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track128-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track128-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track128-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track128-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track128-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track128-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track129-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track129-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track129-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track129-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track129-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track129-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track129-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track129-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track129-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track129-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track129-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track129-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track129-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track13-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track13-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track13-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track13-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track13-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track13-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track13-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track13-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track13-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track13-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track13-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track13-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track13-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track130-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track130-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track130-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track130-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track130-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track130-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track130-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track130-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track130-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track130-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track130-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track130-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track130-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track131-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track131-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track131-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track131-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track131-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track131-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track131-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track131-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track131-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track131-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track131-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track131-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track131-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track132-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track132-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track132-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track132-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track132-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track132-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track132-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track132-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track132-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track132-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track132-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track132-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track132-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track133-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track133-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track133-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track133-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track133-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track133-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track133-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track133-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track133-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track133-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track133-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track133-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track133-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track134-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track134-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track134-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track134-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track134-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track134-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track134-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track134-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track134-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track134-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track134-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track134-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track134-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track135-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track135-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track135-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track135-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track135-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track135-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track135-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track135-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track135-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track135-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track135-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track135-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track135-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track136-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track136-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track136-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track136-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track136-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track136-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track136-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track136-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track136-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track136-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track136-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track136-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track136-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track137-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track137-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track137-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track137-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track137-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track137-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track137-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track137-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track137-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track137-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track137-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track137-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track137-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track138-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track138-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
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-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track138-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track138-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track138-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track138-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track138-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track138-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track138-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track138-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track138-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track138-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track138-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track139-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track139-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track139-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track139-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track139-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track139-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track139-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track139-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track139-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track139-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track139-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track139-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track139-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track14-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track14-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track14-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track14-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track14-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track14-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track14-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track14-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track14-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track14-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track14-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track14-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track14-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track140-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track140-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track140-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track140-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track140-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track140-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track140-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track140-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track140-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track140-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track140-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track140-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track140-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track141-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track141-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track141-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track141-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track141-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track141-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track141-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track141-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track141-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track141-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track141-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track141-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track141-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track142-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track142-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track142-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track142-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track142-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track142-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track142-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track142-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track142-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track142-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track142-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track142-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track142-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track143-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track143-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track143-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track143-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track143-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track143-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track143-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track143-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track143-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track143-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track143-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track143-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track143-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track144-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track144-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track144-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track144-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track144-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track144-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track144-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track144-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track144-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track144-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track144-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track144-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track144-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track145-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track145-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track145-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track145-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track145-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track145-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track145-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track145-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track145-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track145-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track145-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track145-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track145-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track146-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track146-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track146-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track146-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track146-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track146-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track146-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track146-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track146-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track146-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track146-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track146-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track146-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track147-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track147-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track147-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track147-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track147-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track147-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track147-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track147-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track147-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track147-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track147-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track147-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track147-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track148-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track148-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track148-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track148-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track148-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track148-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track148-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track148-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track148-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track148-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track148-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track148-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track148-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track149-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track149-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track149-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track149-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track149-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track149-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track149-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track149-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track149-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track149-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track149-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track149-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track149-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track15-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track15-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track15-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track15-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track15-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track15-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track15-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track15-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track15-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track15-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track15-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track15-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track15-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track150-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track150-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track150-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track150-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track150-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track150-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track150-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track150-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track150-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track150-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track150-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track150-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track150-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track151-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track151-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track151-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track151-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track151-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track151-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track151-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track151-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track151-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track151-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track151-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track151-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track151-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track152-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track152-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track152-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track152-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track152-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track152-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track152-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track152-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track152-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track152-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track152-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track152-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track152-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track153-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track153-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track153-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track153-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track153-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track153-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track153-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track153-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track153-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track153-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track153-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track153-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track153-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track154-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track154-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track154-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track154-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track154-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track154-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track154-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track154-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track154-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track154-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track154-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track154-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track154-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track155-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track155-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track155-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track155-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track155-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track155-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track155-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track155-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track155-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track155-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track155-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track155-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track155-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track156-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track156-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
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-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track156-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track156-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track156-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track156-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track156-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track156-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track156-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track156-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track156-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track156-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track156-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track157-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track157-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track157-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track157-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track157-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track157-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track157-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track157-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track157-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track157-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track157-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track157-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track157-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track158-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track158-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track158-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track158-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track158-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track158-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track158-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track158-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track158-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track158-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track158-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track158-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track158-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track159-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track159-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track159-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track159-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track159-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track159-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track159-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track159-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track159-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track159-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track159-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track159-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track159-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track16-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track16-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track16-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track16-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track16-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track16-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track16-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track16-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track16-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track16-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track16-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track16-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track16-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track160-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track160-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track160-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track160-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track160-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track160-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track160-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track160-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track160-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track160-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track160-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track160-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track160-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track161-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track161-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track161-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track161-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track161-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track161-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track161-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track161-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track161-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track161-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track161-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track161-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track161-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track162-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track162-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track162-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track162-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track162-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track162-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track162-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track162-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track162-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track162-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track162-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track162-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track162-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track163-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track163-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track163-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track163-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track163-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track163-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track163-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track163-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track163-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track163-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track163-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track163-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track163-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track164-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track164-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track164-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track164-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track164-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track164-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track164-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track164-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track164-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track164-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track164-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track164-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track164-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track165-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track165-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track165-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track165-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track165-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track165-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track165-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track165-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track165-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track165-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track165-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track165-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track165-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track166-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track166-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track166-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track166-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track166-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track166-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track166-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track166-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track166-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track166-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track166-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track166-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track166-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track167-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track167-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track167-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track167-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track167-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track167-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track167-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track167-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track167-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track167-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track167-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track167-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track167-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track168-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track168-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
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-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track168-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track168-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track168-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track168-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track168-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track168-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track168-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track168-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track168-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track168-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track168-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track169-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track169-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track169-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track169-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track169-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track169-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track169-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track169-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track169-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track169-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track169-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track169-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track169-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track17-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track17-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track17-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track17-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track17-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track17-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track17-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track17-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track17-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track17-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track17-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track17-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track17-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track170-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track170-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track170-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track170-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track170-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track170-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track170-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track170-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track170-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track170-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track170-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track170-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track170-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track171-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track171-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track171-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track171-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track171-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track171-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track171-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track171-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track171-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track171-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track171-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track171-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track171-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track172-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track172-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track172-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track172-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track172-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track172-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track172-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track172-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track172-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track172-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track172-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track172-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track172-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track173-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track173-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track173-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track173-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track173-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track173-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track173-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track173-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track173-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track173-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track173-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track173-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track173-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track174-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track174-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track174-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track174-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track174-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track174-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track174-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track174-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track174-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track174-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track174-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track174-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track174-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track175-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track175-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track175-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track175-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track175-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track175-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track175-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track175-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track175-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track175-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track175-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track175-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track175-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track176-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track176-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track176-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track176-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track176-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track176-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track176-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track176-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track176-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track176-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track176-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track176-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track176-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track177-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track177-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track177-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track177-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track177-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track177-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track177-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track177-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track177-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track177-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track177-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track177-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track177-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track178-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track178-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track178-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track178-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track178-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track178-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track178-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track178-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track178-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track178-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track178-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track178-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track178-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track179-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track179-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track179-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track179-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track179-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track179-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track179-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track179-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track179-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track179-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track179-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track179-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track179-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track18-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track18-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track18-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track18-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track18-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track18-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track18-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track18-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track18-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track18-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track18-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track18-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track18-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track180-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track180-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track180-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track180-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track180-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track180-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track180-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track180-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track180-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track180-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track180-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track180-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track180-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track181-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track181-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track181-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track181-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track181-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track181-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track181-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track181-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track181-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track181-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track181-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track181-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track181-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track182-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track182-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track182-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track182-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track182-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track182-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track182-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track182-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track182-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track182-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track182-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track182-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track182-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track183-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track183-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track183-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track183-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track183-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track183-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track183-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track183-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track183-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track183-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track183-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track183-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track183-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track184-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track184-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track184-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track184-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track184-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track184-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track184-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track184-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track184-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track184-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track184-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track184-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track184-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track185-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track185-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track185-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track185-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track185-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track185-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track185-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track185-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track185-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track185-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track185-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track185-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track185-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track186-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track186-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track186-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track186-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track186-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track186-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track186-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track186-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track186-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track186-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track186-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track186-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track186-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track187-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track187-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track187-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track187-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track187-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track187-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track187-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track187-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track187-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track187-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track187-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track187-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track187-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track188-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track188-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track188-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track188-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track188-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track188-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track188-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track188-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track188-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track188-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track188-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track188-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track188-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track189-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track189-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track189-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track189-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track189-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track189-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track189-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track189-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track189-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track189-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track189-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track189-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track189-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track19-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track19-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track19-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track19-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track19-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track19-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track19-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track19-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track19-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track19-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track19-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track19-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track19-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track190-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track190-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track190-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track190-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track190-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track190-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track190-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track190-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track190-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track190-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track190-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track190-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track190-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track191-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track191-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track191-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track191-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track191-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track191-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track191-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track191-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track191-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track191-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track191-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track191-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track191-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track192-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track192-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track192-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track192-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track192-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track192-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track192-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track192-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track192-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track192-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track192-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track192-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track192-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track193-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track193-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track193-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track193-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track193-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track193-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track193-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track193-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track193-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track193-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track193-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track193-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track193-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track194-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track194-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track194-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track194-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track194-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track194-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track194-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track194-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track194-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track194-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track194-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track194-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track194-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track195-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track195-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track195-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track195-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track195-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track195-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track195-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track195-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track195-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track195-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track195-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track195-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track195-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track196-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track196-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track196-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track196-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track196-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track196-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track196-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track196-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track196-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track196-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track196-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track196-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track196-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track197-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track197-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track197-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track197-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track197-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track197-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track197-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track197-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track197-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track197-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track197-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track197-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track197-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track198-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track198-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
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-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track198-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track198-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track198-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track198-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track198-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track198-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track198-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track198-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track198-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track198-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track198-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track199-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track199-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track199-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track199-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track199-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track199-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track199-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track199-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track199-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track199-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track199-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track199-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track199-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track20-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track20-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track20-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track20-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track20-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track20-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track20-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track20-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track20-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track20-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track20-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track20-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track20-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track200-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track200-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track200-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track200-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track200-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track200-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track200-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track200-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track200-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track200-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track200-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track200-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track200-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track201-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track201-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track201-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track201-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track201-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track201-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track201-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track201-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track201-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track201-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track201-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track201-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track201-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track202-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track202-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track202-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track202-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track202-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track202-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track202-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track202-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track202-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track202-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track202-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track202-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track202-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track203-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track203-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track203-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track203-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track203-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track203-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track203-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track203-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track203-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track203-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track203-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track203-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track203-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track204-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track204-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track204-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track204-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track204-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track204-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track204-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track204-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track204-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track204-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track204-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track204-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track204-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track205-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track205-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track205-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track205-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track205-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track205-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track205-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track205-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track205-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track205-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track205-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track205-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track205-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track206-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track206-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track206-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track206-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track206-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track206-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track206-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track206-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track206-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track206-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track206-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track206-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track206-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track207-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track207-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track207-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track207-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track207-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track207-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track207-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track207-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track207-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track207-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track207-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track207-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track207-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track208-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track208-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track208-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track208-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track208-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track208-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track208-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track208-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track208-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track208-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track208-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track208-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track208-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track209-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track209-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track209-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track209-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track209-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track209-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track209-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track209-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track209-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track209-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track209-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track209-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track209-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track21-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track21-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track21-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track21-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track21-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track21-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track21-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track21-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track21-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track21-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track21-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track21-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track21-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track210-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track210-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track210-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track210-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track210-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track210-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track210-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track210-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track210-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track210-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track210-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track210-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track210-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track211-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track211-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track211-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track211-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track211-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track211-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track211-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track211-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track211-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track211-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track211-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track211-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track211-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track212-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track212-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track212-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track212-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track212-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track212-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track212-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track212-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track212-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track212-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track212-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track212-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track212-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track213-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track213-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track213-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track213-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track213-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track213-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track213-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track213-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track213-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track213-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track213-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track213-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track213-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track214-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track214-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track214-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track214-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track214-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track214-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track214-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track214-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track214-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track214-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track214-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track214-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track214-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track215-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track215-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track215-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track215-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track215-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track215-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track215-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track215-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track215-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track215-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track215-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track215-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track215-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track216-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track216-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
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-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track216-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track216-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track216-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track216-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track216-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track216-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track216-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track216-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track216-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track216-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track216-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track217-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track217-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track217-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track217-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track217-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track217-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track217-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track217-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track217-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track217-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track217-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track217-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track217-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track218-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track218-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track218-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track218-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track218-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track218-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track218-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track218-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track218-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track218-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track218-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track218-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track218-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track219-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track219-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track219-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track219-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track219-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track219-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track219-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track219-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track219-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track219-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track219-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track219-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track219-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track22-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track22-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track22-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track22-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track22-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track22-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track22-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track22-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track22-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track22-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track22-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track22-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track22-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track220-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track220-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track220-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track220-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track220-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track220-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track220-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track220-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track220-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track220-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track220-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track220-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track220-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track221-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track221-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track221-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track221-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track221-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track221-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track221-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track221-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track221-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track221-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track221-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track221-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track221-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track222-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track222-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track222-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track222-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track222-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track222-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track222-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track222-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track222-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track222-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track222-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track222-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track222-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track223-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track223-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track223-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track223-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track223-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track223-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track223-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track223-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track223-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track223-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track223-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track223-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track223-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track224-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track224-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track224-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track224-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track224-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track224-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track224-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track224-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track224-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track224-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track224-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track224-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track224-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track225-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track225-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track225-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track225-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track225-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track225-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track225-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track225-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track225-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track225-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track225-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track225-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track225-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track226-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track226-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track226-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track226-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track226-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track226-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track226-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track226-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track226-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track226-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track226-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track226-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track226-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track227-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track227-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track227-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track227-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track227-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track227-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track227-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track227-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track227-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track227-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track227-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track227-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track227-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track228-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track228-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
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-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track228-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track228-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track228-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track228-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track228-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track228-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track228-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track228-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track228-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track228-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track228-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track229-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track229-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track229-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track229-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track229-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track229-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track229-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track229-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track229-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track229-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track229-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track229-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track229-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track23-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track23-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track23-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track23-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track23-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track23-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track23-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track23-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track23-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track23-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track23-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track23-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track23-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track230-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track230-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track230-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track230-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track230-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track230-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track230-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track230-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track230-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track230-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track230-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track230-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track230-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track231-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track231-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track231-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track231-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track231-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track231-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track231-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track231-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track231-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track231-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track231-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track231-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track231-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track232-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track232-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track232-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track232-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track232-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track232-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track232-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track232-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track232-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track232-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track232-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track232-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track232-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track233-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track233-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track233-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track233-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track233-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track233-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track233-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track233-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track233-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track233-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track233-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track233-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track233-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track234-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track234-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track234-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track234-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track234-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track234-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track234-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track234-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track234-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track234-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track234-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track234-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track234-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track235-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track235-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track235-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track235-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track235-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track235-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track235-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track235-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track235-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track235-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track235-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track235-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track235-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track236-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track236-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track236-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track236-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track236-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track236-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track236-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track236-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track236-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track236-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track236-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track236-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track236-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track237-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track237-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track237-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track237-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track237-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="track237-frag0-sample1-subs4.png"/>
+		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="track237-frag0-sample1-subs5.png"/>
+		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="track237-frag0-sample1-subs6.png"/>
+		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="track237-frag0-sample1-subs7.png"/>
+		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="track237-frag0-sample1-subs8.png"/>
+		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="track237-frag0-sample1-subs9.png"/>
+		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="track237-frag0-sample1-subs10.png"/>
+		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="track237-frag0-sample1-subs11.png"/>
 	</body>
 </tt>
--- a/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track238-frag0-sample1-subs0.ttml	Wed Dec 17 16:08:43 2014 -0800
+++ b/ttml-ww-profiles/testsuite/dece/Solekai032_MaxNumSubtitleTracks_v7_subtitles/track238-frag0-sample1-subs0.ttml	Thu Dec 18 07:27:12 2014 -0800
@@ -11,16 +11,16 @@
 		</layout>
 	</head>
 	<body>
-		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="1.png"/>
-		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="2.png"/>
-		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="3.png"/>
-		<div region="region1" begin="00:00:20:05" end="00:00:25:05" smpte:backgroundImage="4.png"/>
-		<div region="region1" begin="00:00:25:05" end="00:00:30:05" smpte:backgroundImage="5.png"/>
-		<div region="region1" begin="00:00:30:05" end="00:00:35:05" smpte:backgroundImage="6.png"/>
-		<div region="region1" begin="00:00:35:05" end="00:00:40:05" smpte:backgroundImage="7.png"/>
-		<div region="region1" begin="00:00:40:05" end="00:00:45:05" smpte:backgroundImage="8.png"/>
-		<div region="region1" begin="00:00:45:05" end="00:00:50:05" smpte:backgroundImage="9.png"/>
-		<div region="region1" begin="00:00:50:05" end="00:00:55:05" smpte:backgroundImage="10.png"/>
-		<div region="region1" begin="00:00:55:05" end="00:00:59:05" smpte:backgroundImage="11.png"/>
+		<div region="region1" begin="00:00:05:05" end="00:00:10:05" smpte:backgroundImage="track238-frag0-sample1-subs1.png"/>
+		<div region="region1" begin="00:00:10:05" end="00:00:15:05" smpte:backgroundImage="track238-frag0-sample1-subs2.png"/>
+		<div region="region1" begin="00:00:15:05" end="00:00:20:05" smpte:backgroundImage="track238-frag0-sample1-subs3.png"/>
+		<div region="region1" begin="00:00:20: