--- a/ttml10/spec/ttaf1-dfxp.xml	Fri Aug 09 10:13:58 2013 -0600
+++ b/ttml10/spec/ttaf1-dfxp.xml	Fri Aug 09 10:30:23 2013 -0600
@@ -697,7 +697,7 @@
 <label>Related Media Object Region</label>
 <def>
 <p>When a non-null <emph>Related Media Object</emph> exists, the region of this media object,
-expressed in the coordinate system that applies to the Document Instance that is associated with the
+expressed in the coordinate system that applies to the <emph>Document Instance</emph> that is associated with the
 related media object.</p>
 </def>
 </gitem>

--- a/ttml2/spec/ttml2.xml	Fri Aug 09 10:13:58 2013 -0600
+++ b/ttml2/spec/ttml2.xml	Fri Aug 09 10:30:23 2013 -0600
@@ -697,7 +697,7 @@
 <label>Related Media Object Region</label>
 <def>
 <p>When a non-null <emph>Related Media Object</emph> exists, the region of this media object,
-expressed in the coordinate system that applies to the Document Instance that is associated with the
+expressed in the coordinate system that applies to the <emph>Document Instance</emph> that is associated with the
 related media object.</p>
 </def>
 </gitem>