[ttml10se] add note that region area need not be contained in RC region (9.1.2)
--- a/ttml10/spec/ttaf1-dfxp.xml Wed Jul 10 17:14:27 2013 -0600
+++ b/ttml10/spec/ttaf1-dfxp.xml Thu Jul 11 10:28:51 2013 -0600
@@ -7133,6 +7133,13 @@
<head>region</head>
<p>The <el>region</el> element is used to define a rectangular space or area into which content is
to be flowed for the purpose of presentation.</p>
+<note role="elaboration">
+<p>The rectangular area of a region is explicitly not constrained to be contained within the <emph>Root Container
+Region</emph>. In particular, the origin components of a region may be negative, and the extent (width and
+height) components of a region may be greater than the width and height of the <emph>Root Contatiner Region</emph>.
+Whether a presentation processor clips such a region to the <emph>Root Contatiner Region</emph> is implementation
+dependent, and not prescribed by this specification.</p>
+</note>
<p>In addition, and in accordance with
<specref ref="semantics-style-inheritance-region"/>,
the <el>region</el> element may be used to specify inheritable style properties to be
--- a/ttml10/spec/ttml-changes.html Wed Jul 10 17:14:27 2013 -0600
+++ b/ttml10/spec/ttml-changes.html Thu Jul 11 10:28:51 2013 -0600
@@ -50,6 +50,8 @@
* In 8.1.2, remove erroneous sentence stating that style element takes metadata children (this
support was removed in the sytnax definition and schema before REC was published, but this
sentence was inadvertently left in the text).
+* In 9.1.2, add note elaborating that a region's area need not be contained in the root container
+ region and that clipping behavior on the root container region is not specified.
* In 12.1.7, clarify that agent attribute on ttm:actor must reference a "significant" ttm:agent
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.,