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Correct and clarify #extent-root-version-2 (#1027). #1110

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9 changes: 7 additions & 2 deletions spec/ttml2.xml
Original file line number Diff line number Diff line change
Expand Up @@ -20995,15 +20995,20 @@ when applied to the <loc href="#document-structure-vocabulary-tt"><el>tt</el></l
<ulist>
<item><p><loc href="#feature-extent-root"><code>#extent-root</code></loc></p></item>
<item><p><loc href="#feature-extent-auto-version-2"><code>#extent-auto-version-2</code></loc></p></item>
<item><p><loc href="#feature-extent-length-version-2"><code>#extent-length-version-2</code></loc></p></item>
<item><p><loc href="#feature-extent-contain"><code>#extent-contain</code></loc></p></item>
</ulist>
<p>The <code>#extent-root-version-2</code> feature is a syntactic and semantic extension of the
<loc href="#feature-extent-root"><code>#extent-root</code></loc> feature.</p>
<p>It is an error for a content profile to require or permit use of the <code>#extent-root-version-2</code> feature
but prohibit use of any of the following features:
<loc href="#feature-extent-root"><code>#extent-root</code></loc>,
<loc href="#feature-extent-auto-version-2"><code>#extent-auto-version-2</code></loc>, or
<loc href="#feature-extent-length-version-2"><code>#extent-length-version-2</code></loc>.</p>
<loc href="#feature-extent-contain"><code>#extent-contain</code></loc>.</p>
<note role="clarification">
<p>Support for the <code>#extent-root-version-2</code> feature is intended to imply support for the
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<code>#extent-contain</code> feature only when applied to the root <loc href="#document-structure-vocabulary-tt"><el>tt</el></loc> element,
and not other element types.</p>
</note>
</div3>
<div3 id="feature-extent-version-2">
<head>#extent-version-2</head>
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