--- a/ttml10/spec/ttaf1-dfxp.xml	Tue Aug 20 09:52:33 2013 -0600
+++ b/ttml10/spec/ttaf1-dfxp.xml	Wed Aug 21 11:11:33 2013 -0600
@@ -8515,9 +8515,7 @@
 agents that perform or are
 involved in the performance of the content.</p>
 <p>If specified, a <att>ttm:agent</att> attribute must reference <emph>significant</emph>
-<el>ttm:agent</el> element instances that appear
-as a descendent of the same <emph>Document Instance</emph> as
-that of the referring element.</p>
+<el>ttm:agent</el> element instances.</p>
 <p>The same IDREF, <emph>ID</emph>, should not appear more than once in the value of a <att>ttm:agent</att> attribute.</p>
 <note role="explanation">
 <p>This constraint is intended to discourage the use of redundant agent references.</p>

--- a/ttml10/spec/ttml-changes.html	Tue Aug 20 09:52:33 2013 -0600
+++ b/ttml10/spec/ttml-changes.html	Wed Aug 21 11:11:33 2013 -0600
@@ -71,6 +71,8 @@
   element, i.e., a ttm:agent appearing as a child of head or a child of a metadata child of head.  
 * In 12.2.1, clarify that ttm:agent attribute must reference "significant" ttm:agent elements, i.e.,
   ttm:agent elements appearing as children of head or childen of a metadata child of head.
+* In 12.2.1, remove requirement that ttm:agent must reference elements in the same document instance,
+  which is redundant given the requirement that the reference be "significant".
 * Replace "content" in the phrase "content element(s)" with a link to the "Content" module
   of Table 3 - Element Vocabulary.
 

--- a/ttml2/spec/ttml2.xml	Tue Aug 20 09:52:33 2013 -0600
+++ b/ttml2/spec/ttml2.xml	Wed Aug 21 11:11:33 2013 -0600
@@ -8570,9 +8570,7 @@
 agents that perform or are
 involved in the performance of the content.</p>
 <p>If specified, a <att>ttm:agent</att> attribute must reference <emph>significant</emph>
-<el>ttm:agent</el> element instances that appear
-as a descendent of the same <emph>Document Instance</emph> as
-that of the referring element.</p>
+<el>ttm:agent</el> element instances.</p>
 <p>The same IDREF, <emph>ID</emph>, should not appear more than once in the value of a <att>ttm:agent</att> attribute.</p>
 <note role="explanation">
 <p>This constraint is intended to discourage the use of redundant agent references.</p>