--- a/ttml-ww-profiles/ttml-ww-profiles.html Wed Oct 02 13:28:24 2013 -0700
+++ b/ttml-ww-profiles/ttml-ww-profiles.html Wed Oct 02 20:20:30 2013 -0700
@@ -1,5 +1,5 @@
<!DOCTYPE html>
-<html lang="en" dir="ltr">
+<html lang="en" dir="ltr" typeof="bibo:Document w3p:WD" about="" property="dcterms:language" content="en">
<head>
<meta charset="utf-8">
@@ -201,17 +201,17 @@
}
-</style><link href="http://www.w3.org/StyleSheets/TR/W3C-WD" rel="stylesheet"><!--[if lt IE 9]><script src='http://www.w3.org/2008/site/js/html5shiv.js'></script><![endif]--></head>
-
-<body class="h-entry"><div class="head">
+</style><link href="https://www.w3.org/StyleSheets/TR/W3C-WD" rel="stylesheet"><!--[if lt IE 9]><script src='https://www.w3.org/2008/site/js/html5shiv.js'></script><![endif]--></head>
+
+<body id="respecDocument" role="document" class="h-entry"><div id="respecHeader" role="contentinfo" class="head">
<p>
- <a href="http://www.w3.org/"><img src="http://www.w3.org/Icons/w3c_home" alt="W3C" height="48" width="72"></a>
+ <a href="http://www.w3.org/"><img src="https://www.w3.org/Icons/w3c_home" alt="W3C" height="48" width="72"></a>
</p>
- <h1 class="title p-name" id="title">TTML Text and Image Profiles for Internet Media Subtitles and Captions</h1>
+ <h1 class="title p-name" id="title" property="dcterms:title">TTML Text and Image Profiles for Internet Media Subtitles and Captions</h1>
- <h2 id="w3c-working-draft-02-october-2013"><abbr title="World Wide Web Consortium">W3C</abbr> Working Draft <time class="dt-published" datetime="2013-10-02">02 October 2013</time></h2>
+ <h2 id="w3c-working-draft-02-october-2013" property="dcterms:issued" datatype="xsd:dateTime" content="2013-10-03T03:18:30.000Z"><abbr title="World Wide Web Consortium">W3C</abbr> Working Draft <time class="dt-published" datetime="2013-10-02">02 October 2013</time></h2>
<dl>
<dt>This version:</dt>
@@ -225,11 +225,12 @@
<dt>Previous version:</dt>
- <dd><a href="http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/">http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/</a></dd>
+ <dd><a rel="dcterms:replaces" href="http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/">http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/</a></dd>
<dt>Editor:</dt>
- <dd class="p-author h-card vcard"><span class="p-name fn">Pierre Lemieux</span>, <span class="ed_mailto"><a class="u-email email" href="mailto:pal@sandflow.com">pal@sandflow.com</a></span></dd>
+ <dd class="p-author h-card vcard" rel="bibo:editor" inlist=""><span typeof="foaf:Person"><span property="foaf:name" class="p-name fn">Pierre Lemieux</span>, <span class="ed_mailto"><a class="u-email email" rel="foaf:mbox" href="mailto:pal@sandflow.com">pal@sandflow.com</a></span></span>
+</dd>
@@ -240,13 +241,16 @@
<p class="copyright">
- <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> ©
+ <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> ©
2013
- <a href="http://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup>
+ <a href="http://www.w3.org/"><abbr title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup>
(<a href="http://www.csail.mit.edu/"><abbr title="Massachusetts Institute of Technology">MIT</abbr></a>,
<a href="http://www.ercim.eu/"><abbr title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>,
- <a href="http://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved.
+ <a href="http://www.keio.ac.jp/">Keio</a>, <a href="http://ev.buaa.edu.cn/">Beihang</a>),
+
+ All Rights Reserved.
+
<abbr title="World Wide Web Consortium">W3C</abbr> <a href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
<a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a> and
<a href="http://www.w3.org/Consortium/Legal/copyright-documents">document use</a> rules apply.
@@ -255,14 +259,14 @@
<hr>
</div>
- <section class="introductory" id="abstract"><h2>Abstract</h2>
+ <section rel="bibo:chapter" resource="#abstract" typeof="bibo:Chapter" datatype="" property="dcterms:abstract" class="introductory" id="abstract"><h2 id="h2_abstract" role="heading" aria-level="1">Abstract</h2>
<p>This document specifies two profiles of [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>]: a text-only profile and an image-only
profile. These profiles are intended to be used across subtitle and caption delivery applications worldwide, thereby
simplifying interoperability, consistent rendering and conversion to other subtitling and captioning formats. The text profile
- is a superset of <a href="http://www.w3.org/TR/ttml10-sdp-us/">SDP-US</a>.</p>
+ is a superset of [<cite><a href="#bib-SDPUS" class="bibref">SDPUS</a></cite>].</p>
<p>Both profiles are based on [<cite><a href="#bib-SUBM" class="bibref">SUBM</a></cite>].</p>
- </section><section id="sotd" class="introductory"><h2>Status of This Document</h2>
+ </section><section rel="bibo:chapter" resource="#sotd" typeof="bibo:Chapter" id="sotd" class="introductory"><h2 id="h2_sotd" role="heading" aria-level="1">Status of This Document</h2>
@@ -287,10 +291,10 @@
- All comments are welcome.
+ All comments are welcome.</p>
+
-
- </p><p>
+ <p>
Publication as a Working Draft does not imply endorsement by the <abbr title="World Wide Web Consortium">W3C</abbr> Membership.
This is a draft document and may be updated, replaced or obsoleted by other documents at
any time. It is inappropriate to cite this document as other than work in progress.
@@ -300,7 +304,9 @@
<p>
This document was produced by a group operating under the
- <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 <abbr title="World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
+
+ <a id="sotd_patent" about="" rel="w3p:patentRules" href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 <abbr title="World Wide Web Consortium">W3C</abbr> Patent Policy</a>.
+
@@ -319,24 +325,24 @@
-</section><section id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a class="tocxref" href="#scope"><span class="secno">1. </span>Scope</a></li><li class="tocline"><a class="tocxref" href="#conformance"><span class="secno">2. </span>Conformance</a></li><li class="tocline"><a class="tocxref" href="#profiles"><span class="secno">3. </span>Profiles</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#general"><span class="secno">3.1 </span>General</a></li><li class="tocline"><a class="tocxref" href="#text-profile"><span class="secno">3.2 </span>Text Profile</a></li><li class="tocline"><a class="tocxref" href="#image-profile"><span class="secno">3.3 </span>Image Profile</a></li></ul></li><li class="tocline"><a class="tocxref" href="#common-constraints"><span class="secno">4. </span>Common Constraints</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#document-encoding"><span class="secno">4.1 </span>Document Encoding</a></li><li class="tocline"><a class="tocxref" href="#namespaces"><span class="secno">4.2 </span>Namespaces</a></li><li class="tocline"><a class="tocxref" href="#related-video-object"><span class="secno">4.3 </span>Related Video Object</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#general-1"><span class="secno">4.3.1 </span>General</a></li><li class="tocline"><a class="tocxref" href="#root-container"><span class="secno">4.3.2 </span>Root Container</a></li><li class="tocline"><a class="tocxref" href="#synchronization"><span class="secno">4.3.3 </span>Synchronization</a></li></ul></li><li class="tocline"><a class="tocxref" href="#language"><span class="secno">4.4 </span>Language</a></li><li class="tocline"><a class="tocxref" href="#progressively-decodable"><span class="secno">4.5 </span>Progressively Decodable</a></li><li class="tocline"><a class="tocxref" href="#region"><span class="secno">4.6 </span>Region</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#presented-region"><span class="secno">4.6.1 </span>Presented Region</a></li><li class="tocline"><a class="tocxref" href="#dimensions-and-position"><span class="secno">4.6.2 </span>Dimensions and Position</a></li><li class="tocline"><a class="tocxref" href="#maximum-number"><span class="secno">4.6.3 </span>Maximum number</a></li></ul></li><li class="tocline"><a class="tocxref" href="#hypothetical-render-model"><span class="secno">4.7 </span>Hypothetical Render Model</a></li><li class="tocline"><a class="tocxref" href="#features"><span class="secno">4.8 </span>Features</a></li></ul></li><li class="tocline"><a class="tocxref" href="#text-profile-constraints"><span class="secno">5. </span>Text Profile Constraints</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#profile-designator-and-definition-document"><span class="secno">5.1 </span>Profile Designator and Definition Document</a></li><li class="tocline"><a class="tocxref" href="#features-1"><span class="secno">5.2 </span>Features</a></li></ul></li><li class="tocline"><a class="tocxref" href="#image-profile-constraints"><span class="secno">6. </span>Image Profile Constraints</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#profile-designator-and-definition-document-1"><span class="secno">6.1 </span>Profile Designator and Definition Document</a></li><li class="tocline"><a class="tocxref" href="#presented-image"><span class="secno">6.2 </span>Presented Image</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#definition"><span class="secno">6.2.1 </span>Definition</a></li><li class="tocline"><a class="tocxref" href="#number-per-region"><span class="secno">6.2.2 </span>Number per Region</a></li></ul></li><li class="tocline"><a class="tocxref" href="#div-element"><span class="secno">6.3 </span><code>div</code> element</a></li><li class="tocline"><a class="tocxref" href="#features-2"><span class="secno">6.4 </span>Features</a></li></ul></li><li class="tocline"><a class="tocxref" href="#hypothetical-render-model-1"><span class="secno">7. </span>Hypothetical Render Model</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#performance-model"><span class="secno">7.1 </span>Performance Model</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#overview"><span class="secno">7.1.1 </span>Overview</a></li><li class="tocline"><a class="tocxref" href="#general-2"><span class="secno">7.1.2 </span>General</a></li><li class="tocline"><a class="tocxref" href="#paint-regions"><span class="secno">7.1.3 </span>Paint Regions</a></li><li class="tocline"><a class="tocxref" href="#paint-images"><span class="secno">7.1.4 </span>Paint Images</a></li><li class="tocline"><a class="tocxref" href="#paint-text"><span class="secno">7.1.5 </span>Paint Text</a></li></ul></li><li class="tocline"><a class="tocxref" href="#layout-model"><span class="secno">7.2 </span>Layout Model</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#general-3"><span class="secno">7.2.1 </span>General</a></li><li class="tocline"><a class="tocxref" href="#reference-fonts"><span class="secno">7.2.2 </span>Reference Fonts</a></li><li class="tocline"><a class="tocxref" href="#line-height-and-centering"><span class="secno">7.2.3 </span>Line Height and Centering</a></li></ul></li></ul></li><li class="tocline"><a class="tocxref" href="#recommended-unicode-code-points-per-language"><span class="secno">A. </span>Recommended Unicode Code Points per Language</a></li><li class="tocline"><a class="tocxref" href="#typical-practice-for-subtitles-per-region-informative"><span class="secno">B. </span>Typical Practice for Subtitles per Region (Informative)</a></li><li class="tocline"><a class="tocxref" href="#schema"><span class="secno">C. </span>Schema</a></li><li class="tocline"><a class="tocxref" href="#references"><span class="secno">D. </span>References</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#normative-references"><span class="secno">D.1 </span>Normative references</a></li><li class="tocline"><a class="tocxref" href="#informative-references"><span class="secno">D.2 </span>Informative references</a></li></ul></li></ul></section>
-
- <section id="scope">
- <!--OddPage--><h2><span class="secno">1. </span>Scope</h2>
+</section><section id="toc"><h2 id="h2_toc" role="heading" aria-level="1" class="introductory">Table of Contents</h2><ul id="respecContents" role="directory" class="toc"><li class="tocline"><a class="tocxref" href="#scope"><span class="secno">1. </span>Scope</a></li><li class="tocline"><a class="tocxref" href="#conformance"><span class="secno">2. </span>Conformance</a></li><li class="tocline"><a class="tocxref" href="#profiles"><span class="secno">3. </span>Profiles</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#general"><span class="secno">3.1 </span>General</a></li><li class="tocline"><a class="tocxref" href="#text-profile"><span class="secno">3.2 </span>Text Profile</a></li><li class="tocline"><a class="tocxref" href="#image-profile"><span class="secno">3.3 </span>Image Profile</a></li></ul></li><li class="tocline"><a class="tocxref" href="#common-constraints"><span class="secno">4. </span>Common Constraints</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#document-encoding"><span class="secno">4.1 </span>Document Encoding</a></li><li class="tocline"><a class="tocxref" href="#namespaces"><span class="secno">4.2 </span>Namespaces</a></li><li class="tocline"><a class="tocxref" href="#related-video-object"><span class="secno">4.3 </span>Related Video Object</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#general-1"><span class="secno">4.3.1 </span>General</a></li><li class="tocline"><a class="tocxref" href="#root-container"><span class="secno">4.3.2 </span>Root Container</a></li><li class="tocline"><a class="tocxref" href="#synchronization"><span class="secno">4.3.3 </span>Synchronization</a></li></ul></li><li class="tocline"><a class="tocxref" href="#language"><span class="secno">4.4 </span>Language</a></li><li class="tocline"><a class="tocxref" href="#progressively-decodable"><span class="secno">4.5 </span>Progressively Decodable</a></li><li class="tocline"><a class="tocxref" href="#region"><span class="secno">4.6 </span>Region</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#presented-region"><span class="secno">4.6.1 </span>Presented Region</a></li><li class="tocline"><a class="tocxref" href="#dimensions-and-position"><span class="secno">4.6.2 </span>Dimensions and Position</a></li><li class="tocline"><a class="tocxref" href="#maximum-number"><span class="secno">4.6.3 </span>Maximum number</a></li></ul></li><li class="tocline"><a class="tocxref" href="#hypothetical-render-model"><span class="secno">4.7 </span>Hypothetical Render Model</a></li><li class="tocline"><a class="tocxref" href="#features"><span class="secno">4.8 </span>Features</a></li></ul></li><li class="tocline"><a class="tocxref" href="#text-profile-constraints"><span class="secno">5. </span>Text Profile Constraints</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#profile-designator-and-definition-document"><span class="secno">5.1 </span>Profile Designator and Definition Document</a></li><li class="tocline"><a class="tocxref" href="#features-1"><span class="secno">5.2 </span>Features</a></li></ul></li><li class="tocline"><a class="tocxref" href="#image-profile-constraints"><span class="secno">6. </span>Image Profile Constraints</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#profile-designator-and-definition-document-1"><span class="secno">6.1 </span>Profile Designator and Definition Document</a></li><li class="tocline"><a class="tocxref" href="#presented-image"><span class="secno">6.2 </span>Presented Image</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#definition"><span class="secno">6.2.1 </span>Definition</a></li><li class="tocline"><a class="tocxref" href="#number-per-region"><span class="secno">6.2.2 </span>Number per Region</a></li></ul></li><li class="tocline"><a class="tocxref" href="#div-element"><span class="secno">6.3 </span><code>div</code> element</a></li><li class="tocline"><a class="tocxref" href="#features-2"><span class="secno">6.4 </span>Features</a></li></ul></li><li class="tocline"><a class="tocxref" href="#hypothetical-render-model-1"><span class="secno">7. </span>Hypothetical Render Model</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#performance-model"><span class="secno">7.1 </span>Performance Model</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#overview"><span class="secno">7.1.1 </span>Overview</a></li><li class="tocline"><a class="tocxref" href="#general-2"><span class="secno">7.1.2 </span>General</a></li><li class="tocline"><a class="tocxref" href="#paint-regions"><span class="secno">7.1.3 </span>Paint Regions</a></li><li class="tocline"><a class="tocxref" href="#paint-images"><span class="secno">7.1.4 </span>Paint Images</a></li><li class="tocline"><a class="tocxref" href="#paint-text"><span class="secno">7.1.5 </span>Paint Text</a></li></ul></li><li class="tocline"><a class="tocxref" href="#layout-model"><span class="secno">7.2 </span>Layout Model</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#general-3"><span class="secno">7.2.1 </span>General</a></li><li class="tocline"><a class="tocxref" href="#reference-fonts"><span class="secno">7.2.2 </span>Reference Fonts</a></li><li class="tocline"><a class="tocxref" href="#line-height-and-centering"><span class="secno">7.2.3 </span>Line Height and Centering</a></li></ul></li></ul></li><li class="tocline"><a class="tocxref" href="#recommended-unicode-code-points-per-language"><span class="secno">A. </span>Recommended Unicode Code Points per Language</a></li><li class="tocline"><a class="tocxref" href="#typical-practice-for-subtitles-per-region-informative"><span class="secno">B. </span>Typical Practice for Subtitles per Region (Informative)</a></li><li class="tocline"><a class="tocxref" href="#schema"><span class="secno">C. </span>Schema</a></li><li class="tocline"><a class="tocxref" href="#references"><span class="secno">D. </span>References</a><ul class="toc"><li class="tocline"><a class="tocxref" href="#normative-references"><span class="secno">D.1 </span>Normative references</a></li><li class="tocline"><a class="tocxref" href="#informative-references"><span class="secno">D.2 </span>Informative references</a></li></ul></li></ul></section>
+
+ <section rel="bibo:chapter" resource="#scope" typeof="bibo:Chapter" id="scope">
+ <!--OddPage--><h2 id="h2_scope" role="heading" aria-level="1"><span class="secno">1. </span>Scope</h2>
<p>This document specifies two profiles of [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>]: a text-only profile and an image-only profile. These profiles are
intended for subtitle and caption delivery worldwide, including dialog language translation, content description, captions for
deaf and hard of hearing, etc.</p>
</section>
- <section id="conformance"><!--OddPage--><h2><span class="secno">2. </span>Conformance</h2>
+ <section rel="bibo:chapter" resource="#conformance" typeof="bibo:Chapter" id="conformance"><!--OddPage--><h2 id="h2_conformance" role="heading" aria-level="1"><span class="secno">2. </span>Conformance</h2>
<p>
As well as sections marked as non-normative, all authoring guidelines, diagrams, examples,
and notes in this specification are non-normative. Everything else in this specification is
normative.
</p>
<p>
- The keywords <em title="MUST" class="rfc2119">MUST</em>, <em title="MUST NOT" class="rfc2119">MUST NOT</em>, <em title="SHALL" class="rfc2119">SHALL</em>, <em title="SHALL NOT" class="rfc2119">SHALL NOT</em>, <em title="REQUIRED" class="rfc2119">REQUIRED</em>, <em title="SHOULD" class="rfc2119">SHOULD</em>, <em title="SHOULD NOT" class="rfc2119">SHOULD NOT</em>, <em title="RECOMMENDED" class="rfc2119">RECOMMENDED</em>, <em title="MAY" class="rfc2119">MAY</em>,
+ The key words <em title="MUST" class="rfc2119">MUST</em>, <em title="MUST NOT" class="rfc2119">MUST NOT</em>, <em title="REQUIRED" class="rfc2119">REQUIRED</em>, <em title="SHOULD" class="rfc2119">SHOULD</em>, <em title="SHOULD NOT" class="rfc2119">SHOULD NOT</em>, <em title="RECOMMENDED" class="rfc2119">RECOMMENDED</em>, <em title="MAY" class="rfc2119">MAY</em>,
and <em title="OPTIONAL" class="rfc2119">OPTIONAL</em> in this specification are to be interpreted as described in [<cite><a href="#bib-RFC2119" class="bibref">RFC2119</a></cite>].
</p>
@@ -348,23 +354,23 @@
</section>
<section id="profiles">
- <!--OddPage--><h2><span class="secno">3. </span>Profiles</h2>
+ <!--OddPage--><h2 id="h2_profiles" role="heading" aria-level="1"><span class="secno">3. </span>Profiles</h2>
<section id="general">
- <h3><span class="secno">3.1 </span>General</h3>
+ <h3 id="h3_general" role="heading" aria-level="2"><span class="secno">3.1 </span>General</h3>
<p>A subtitle document <em title="SHALL NOT" class="rfc2119">SHALL NOT</em> conform to the Text and Image Profiles simultaneously.</p>
</section>
<section id="text-profile">
- <h3><span class="secno">3.2 </span>Text Profile</h3>
+ <h3 id="h3_text-profile" role="heading" aria-level="2"><span class="secno">3.2 </span>Text Profile</h3>
<p>A subtitle document conforming to the Text Profile <em title="SHALL" class="rfc2119">SHALL</em> conform to Sections <a class="sec-ref" href="#common-constraints"><span class="secno">4.</span> <span class="sec-title">Common Constraints</span></a> and
<a class="sec-ref" href="#text-profile-constraints"><span class="secno">5.</span> <span class="sec-title">Text Profile Constraints</span></a>.</p>
</section>
<section id="image-profile">
- <h3><span class="secno">3.3 </span>Image Profile</h3>
+ <h3 id="h3_image-profile" role="heading" aria-level="2"><span class="secno">3.3 </span>Image Profile</h3>
<p>A subtitle document conforming to the Image Profile <em title="SHALL" class="rfc2119">SHALL</em> conform to Sections <a class="sec-ref" href="#common-constraints"><span class="secno">4.</span> <span class="sec-title">Common Constraints</span></a> and
<a class="sec-ref" href="#image-profile-constraints"><span class="secno">6.</span> <span class="sec-title">Image Profile Constraints</span></a>.</p>
@@ -372,16 +378,16 @@
</section>
<section id="common-constraints">
- <!--OddPage--><h2><span class="secno">4. </span>Common Constraints</h2>
+ <!--OddPage--><h2 id="h2_common-constraints" role="heading" aria-level="1"><span class="secno">4. </span>Common Constraints</h2>
<section id="document-encoding">
- <h3><span class="secno">4.1 </span>Document Encoding</h3>
+ <h3 id="h3_document-encoding" role="heading" aria-level="2"><span class="secno">4.1 </span>Document Encoding</h3>
<p>A subtitle document <em title="SHALL" class="rfc2119">SHALL</em> use UTF-8 character encoding as specified in [<cite><a href="#bib-UNICODE" class="bibref">UNICODE</a></cite>].</p>
</section>
<section id="namespaces">
- <h3><span class="secno">4.2 </span>Namespaces</h3>
+ <h3 id="h3_namespaces" role="heading" aria-level="2"><span class="secno">4.2 </span>Namespaces</h3>
<p>The following namespaces (see [<cite><a href="#bib-xml-names" class="bibref">xml-names</a></cite>]) are used in this specification:</p>
@@ -408,19 +414,19 @@
</section>
<section id="related-video-object">
- <h3><span class="secno">4.3 </span>Related Video Object</h3>
+ <h3 id="h3_related-video-object" role="heading" aria-level="2"><span class="secno">4.3 </span>Related Video Object</h3>
<section id="general-1">
- <h4><span class="secno">4.3.1 </span>General</h4>
+ <h4 id="h4_general-1" role="heading" aria-level="3"><span class="secno">4.3.1 </span>General</h4>
<p>A subtitle document <em title="MAY" class="rfc2119">MAY</em> be associated with a related video object, which <em title="SHALL" class="rfc2119">SHALL</em> consist of a sequence of frames, each a
rectangular array of pixels.</p>
</section>
<section id="root-container">
- <h4><span class="secno">4.3.2 </span>Root Container</h4>
-
- <div class="issue"><div aria-level="5" class="issue-title" role="heading"><span>Issue 1</span></div><p class="">See <a href="http://www.w3.org/AudioVideo/TT/tracker/issues/201">ISSUE-201</a> for a discussion of aspect
+ <h4 id="h4_root-container" role="heading" aria-level="3"><span class="secno">4.3.2 </span>Root Container</h4>
+
+ <div class="issue"><div id="h_issue_1" role="heading" aria-level="4" class="issue-title"><span>Issue 1</span></div><p class="">See <a href="http://www.w3.org/AudioVideo/TT/tracker/issues/201">ISSUE-201</a> for a discussion of aspect
ratio in the context of [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>].</p></div>
<p>The root container of a subtitle document <em title="SHALL" class="rfc2119">SHALL</em> be mapped to the related video object frame according to the
@@ -451,7 +457,7 @@
<p><code>ttp:aspectRatio</code> <em title="SHALL NOT" class="rfc2119">SHALL NOT</em> be present if <code>tts:extent</code> is present.<br></p>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">As specified in Section <a class="sec-ref" href="#features"><span class="secno">4.8</span> <span class="sec-title">Features</span></a>, <code>tts:extent</code> is present if the <code>px</code>
+ <div class="note"><div id="h_note_1" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">As specified in Section <a class="sec-ref" href="#features"><span class="secno">4.8</span> <span class="sec-title">Features</span></a>, <code>tts:extent</code> is present if the <code>px</code>
length measure is used anywhere within the document.</p></div>
<p>Integer pixel positions on the related video object frame computed from real percentage length values <em title="SHALL" class="rfc2119">SHALL</em> use half-up
@@ -459,7 +465,7 @@
</section>
<section id="synchronization">
- <h4><span class="secno">4.3.3 </span>Synchronization</h4>
+ <h4 id="h4_synchronization" role="heading" aria-level="3"><span class="secno">4.3.3 </span>Synchronization</h4>
<p>Each intermediate synchronic document of the subtitle document is intended to be displayed on a specific frame and
removed on a specific frame of the related video object.</p>
@@ -478,15 +484,15 @@
</section>
<section id="language">
- <h3><span class="secno">4.4 </span>Language</h3>
+ <h3 id="h3_language" role="heading" aria-level="2"><span class="secno">4.4 </span>Language</h3>
<p>All instances of the <code>xml:lang</code> attribute within a subtitle document <em title="SHALL" class="rfc2119">SHALL</em> have identical values.</p>
- <div class="note"><div aria-level="4" class="note-title" role="heading"><span>Note</span></div><p class=""><code>xml:lang</code> can have a value of "".</p></div>
+ <div class="note"><div id="h_note_2" role="heading" aria-level="3" class="note-title"><span>Note</span></div><p class=""><code>xml:lang</code> can have a value of "".</p></div>
</section>
<section id="progressively-decodable">
- <h3><span class="secno">4.5 </span>Progressively Decodable</h3>
+ <h3 id="h3_progressively-decodable" role="heading" aria-level="2"><span class="secno">4.5 </span>Progressively Decodable</h3>
<p>A progressively decodable subtitle document is a subtitle document structured to facilitate processing before the document
is received in its entirety. It shall conform to the following:</p>
@@ -525,15 +531,15 @@
<p>A <code>imsc:progressivelyDecodable</code> attribute is considered to be significant only when specified on the
<code>tt</code> element.</p>
- <div class="note"><div aria-level="4" class="note-title" role="heading"><span>Note</span></div><p class="">The placement and use of <code>div</code>, <code>region</code> and <code>span</code> that contain time
+ <div class="note"><div id="h_note_3" role="heading" aria-level="3" class="note-title"><span>Note</span></div><p class="">The placement and use of <code>div</code>, <code>region</code> and <code>span</code> that contain time
attributes, and (ii) the use of <code>set</code>.</p></div>
</section>
<section id="region">
- <h3><span class="secno">4.6 </span>Region</h3>
+ <h3 id="h3_region" role="heading" aria-level="2"><span class="secno">4.6 </span>Region</h3>
<section id="presented-region">
- <h4><span class="secno">4.6.1 </span>Presented Region</h4>
+ <h4 id="h4_presented-region" role="heading" aria-level="3"><span class="secno">4.6.1 </span>Presented Region</h4>
<p>A region, as defined in [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>], <em title="SHALL" class="rfc2119">SHALL</em> be considered presented in a given intermediate synchronic document if both of
the following conditions are true:</p>
@@ -553,13 +559,13 @@
</li>
</ol>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">As specified in [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>], the initial value of <code>tts:opacity</code> is "1.0", the initial
+ <div class="note"><div id="h_note_4" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">As specified in [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>], the initial value of <code>tts:opacity</code> is "1.0", the initial
value of <code>tts:showBackground</code> is "always", and the initial value of <code>tts:display</code> is
"auto"</p></div>
</section>
<section id="dimensions-and-position">
- <h4><span class="secno">4.6.2 </span>Dimensions and Position</h4>
+ <h4 id="h4_dimensions-and-position" role="heading" aria-level="3"><span class="secno">4.6.2 </span>Dimensions and Position</h4>
<p>All regions <em title="SHALL" class="rfc2119">SHALL</em> be entirely contained within the root container, i.e. the intersection of the sets of coordinates belonging to a region (including its boundary) and the sets of coordinates belonging to the root container (including its boundary) is the set of coordinates belonging to the region (including its boundary).</p>
@@ -567,21 +573,21 @@
</section>
<section id="maximum-number">
- <h4><span class="secno">4.6.3 </span>Maximum number</h4>
+ <h4 id="h4_maximum-number" role="heading" aria-level="3"><span class="secno">4.6.3 </span>Maximum number</h4>
<p>The number of presented regions in a given intermediate synchronic document <em title="SHALL" class="rfc2119">SHALL</em> be smaller than or equal to 4.</p>
</section>
</section>
<section id="hypothetical-render-model">
- <h3><span class="secno">4.7 </span>Hypothetical Render Model</h3>
+ <h3 id="h3_hypothetical-render-model" role="heading" aria-level="2"><span class="secno">4.7 </span>Hypothetical Render Model</h3>
<p>Any sequence of consecutive intermediate synchronic documents <em title="SHALL" class="rfc2119">SHALL</em> be reproducible without error by the Hypothetical
Render Model specified in Section <a class="sec-ref" href="#hypothetical-render-model"><span class="secno">4.7</span> <span class="sec-title">Hypothetical Render Model</span></a>.</p>
</section>
<section id="features">
- <h3><span class="secno">4.8 </span>Features</h3>
+ <h3 id="h3_features" role="heading" aria-level="2"><span class="secno">4.8 </span>Features</h3>
<p>Unless specified otherwise, the features included in a subtitle document <em title="SHALL" class="rfc2119">SHALL</em> conform to the Table below:</p>
@@ -998,23 +1004,23 @@
</tbody>
</table>
- <div class="issue"><div aria-level="4" class="issue-title" role="heading"><span>Issue 2</span></div><p class="">See <a href="http://www.w3.org/AudioVideo/TT/tracker/issues/230">ISSUE-230</a> for a description of
+ <div class="issue"><div id="h_issue_2" role="heading" aria-level="3" class="issue-title"><span>Issue 2</span></div><p class="">See <a href="http://www.w3.org/AudioVideo/TT/tracker/issues/230">ISSUE-230</a> for a description of
<code>#forcedDisplay</code></p></div>
- <div class="note"><div aria-level="4" class="note-title" role="heading"><span>Note</span></div><p class="">The initial values specified for <code>tts:color</code>, <code>tts:displayAlign</code> and
+ <div class="note"><div id="h_note_5" role="heading" aria-level="3" class="note-title"><span>Note</span></div><p class="">The initial values specified for <code>tts:color</code>, <code>tts:displayAlign</code> and
<code>tts:textAlign</code> are those specified by [<cite><a href="#bib-ST2052-1" class="bibref">ST2052-1</a></cite>] if the selected region is the root container.</p></div>
- <div class="note"><div aria-level="4" class="note-title" role="heading"><span>Note</span></div><p class="">As specified in [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>], a <code>#time-offset-with-frames</code> expression is translated to a media time
+ <div class="note"><div id="h_note_6" role="heading" aria-level="3" class="note-title"><span>Note</span></div><p class="">As specified in [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>], a <code>#time-offset-with-frames</code> expression is translated to a media time
M according to M = 3600 · hours + 60 · minutes + seconds + (frames ÷ (<code>ttp:frameRateMultiplier</code> ·
<code>ttp:frameRate</code>)).</p></div>
</section>
</section>
<section id="text-profile-constraints">
- <!--OddPage--><h2><span class="secno">5. </span>Text Profile Constraints</h2>
+ <!--OddPage--><h2 id="h2_text-profile-constraints" role="heading" aria-level="1"><span class="secno">5. </span>Text Profile Constraints</h2>
<section id="profile-designator-and-definition-document">
- <h3><span class="secno">5.1 </span>Profile Designator and Definition Document</h3>
+ <h3 id="h3_profile-designator-and-definition-document" role="heading" aria-level="2"><span class="secno">5.1 </span>Profile Designator and Definition Document</h3>
<p>A subtitle document conforming to the Text Profile <em title="SHALL" class="rfc2119">SHALL</em> be associated with the following profile designator and profile
definition document:</p>
@@ -1028,9 +1034,9 @@
</section>
<section id="features-1">
- <h3><span class="secno">5.2 </span>Features</h3>
+ <h3 id="h3_features-1" role="heading" aria-level="2"><span class="secno">5.2 </span>Features</h3>
- <div class="issue"><div aria-level="4" class="issue-title" role="heading"><span>Issue 3</span></div><p class="">The following assumes, but does not require, the porting of the [<cite><a href="#bib-ST2052-1" class="bibref">ST2052-1</a></cite>] <code>#backgroundImage</code>
+ <div class="issue"><div id="h_issue_3" role="heading" aria-level="3" class="issue-title"><span>Issue 3</span></div><p class="">The following assumes, but does not require, the porting of the [<cite><a href="#bib-ST2052-1" class="bibref">ST2052-1</a></cite>] <code>#backgroundImage</code>
features to [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>]. See <a href="http://www.w3.org/AudioVideo/TT/tracker/issues/238">ISSUE-238</a>.</p></div>
<p>The features included in a subtitle document <em title="SHALL" class="rfc2119">SHALL</em> conform to the Table below:</p>
@@ -1339,10 +1345,10 @@
</section>
<section id="image-profile-constraints">
- <!--OddPage--><h2><span class="secno">6. </span>Image Profile Constraints</h2>
+ <!--OddPage--><h2 id="h2_image-profile-constraints" role="heading" aria-level="1"><span class="secno">6. </span>Image Profile Constraints</h2>
<section id="profile-designator-and-definition-document-1">
- <h3><span class="secno">6.1 </span>Profile Designator and Definition Document</h3>
+ <h3 id="h3_profile-designator-and-definition-document-1" role="heading" aria-level="2"><span class="secno">6.1 </span>Profile Designator and Definition Document</h3>
<p>A subtitle document conforming to the Image Profile <em title="SHALL" class="rfc2119">SHALL</em> be associated with the following profile designator and profile
definition document:</p>
@@ -1356,17 +1362,17 @@
</section>
<section id="presented-image">
- <h3><span class="secno">6.2 </span>Presented Image</h3>
+ <h3 id="h3_presented-image" role="heading" aria-level="2"><span class="secno">6.2 </span>Presented Image</h3>
<section id="definition">
- <h4><span class="secno">6.2.1 </span>Definition</h4>
+ <h4 id="h4_definition" role="heading" aria-level="3"><span class="secno">6.2.1 </span>Definition</h4>
<p>A presented image <em title="SHALL" class="rfc2119">SHALL</em> be a <code>div</code> element with a smpte:backgroundImage attribute that is contained within a
presented region.</p>
</section>
<section id="number-per-region">
- <h4><span class="secno">6.2.2 </span>Number per Region</h4><!-- start CFF-TT 1.0.7 -->
+ <h4 id="h4_number-per-region" role="heading" aria-level="3"><span class="secno">6.2.2 </span>Number per Region</h4><!-- start CFF-TT 1.0.7 -->
<p>In a given synchronic document, there shall be at most one presented image per presented region.</p>
<!-- end CFF-TT 1.0.7 -->
@@ -1374,7 +1380,7 @@
</section>
<section id="div-element">
- <h3><span class="secno">6.3 </span><code>div</code> element</h3>
+ <h3 id="h3_div-element" role="heading" aria-level="2"><span class="secno">6.3 </span><code>div</code> element</h3>
<p>If a <code>tts:backgroundImage</code> attribute is applied to a <code>div</code> element, the width and height of the
region extent associated with the <code>div</code> element <em title="SHALL" class="rfc2119">SHALL</em> be present and <em title="SHALL" class="rfc2119">SHALL</em> be equal to the width and height of the
@@ -1382,9 +1388,9 @@
</section>
<section id="features-2">
- <h3><span class="secno">6.4 </span>Features</h3>
-
- <div class="issue"><div aria-level="4" class="issue-title" role="heading"><span>Issue 4</span></div><p class="">The following assumes, but does not require, the porting of the [<cite><a href="#bib-ST2052-1" class="bibref">ST2052-1</a></cite>] <code>#backgroundImage</code>
+ <h3 id="h3_features-2" role="heading" aria-level="2"><span class="secno">6.4 </span>Features</h3>
+
+ <div class="issue"><div id="h_issue_4" role="heading" aria-level="3" class="issue-title"><span>Issue 4</span></div><p class="">The following assumes, but does not require, the porting of the [<cite><a href="#bib-ST2052-1" class="bibref">ST2052-1</a></cite>] <code>#backgroundImage</code>
features to [<cite><a href="#bib-TTML2" class="bibref">TTML2</a></cite>]. See <a href="http://www.w3.org/AudioVideo/TT/tracker/issues/238">ISSUE-238</a>.</p></div>
@@ -1552,13 +1558,13 @@
</section>
<section id="hypothetical-render-model-1">
- <!--OddPage--><h2><span class="secno">7. </span>Hypothetical Render Model</h2>
+ <!--OddPage--><h2 id="h2_hypothetical-render-model-1" role="heading" aria-level="1"><span class="secno">7. </span>Hypothetical Render Model</h2>
<section id="performance-model">
- <h3><span class="secno">7.1 </span>Performance Model</h3>
+ <h3 id="h3_performance-model" role="heading" aria-level="2"><span class="secno">7.1 </span>Performance Model</h3>
<section id="overview">
- <h4><span class="secno">7.1.1 </span>Overview</h4>
+ <h4 id="h4_overview" role="heading" aria-level="3"><span class="secno">7.1.1 </span>Overview</h4>
<p>This Section specifies the Hypothetical Render Model illustrated in <a class="fig-ref" href="#fig-hypothetical-render-model">Fig. <span class="figno">1</span> <span class="fig-title">
Hypothetical Render Model
@@ -1600,7 +1606,7 @@
</section>
<section id="general-2">
- <h4><span class="secno">7.1.2 </span>General</h4>
+ <h4 id="h4_general-2" role="heading" aria-level="3"><span class="secno">7.1.2 </span>General</h4>
<p>The Presentation Compositor <em title="SHALL" class="rfc2119">SHALL</em> render in Presentation Buffer P<sub>n</sub> each successive intermediate synchronic
document E<sub>n</sub> using the following steps in order:</p>
@@ -1651,7 +1657,7 @@
P<sub>n-1</sub> at the presentation time of intermediate synchronic document E<sub>n</sub>, making the latter available for
display.</p>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">It is possible for the contents of Presentation Buffer P<sub>n-1</sub> to never be displayed. This can
+ <div class="note"><div id="h_note_7" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">It is possible for the contents of Presentation Buffer P<sub>n-1</sub> to never be displayed. This can
happen if Presentation Buffer P<sub>n</sub> is copied twice to Presentation Buffer P<sub>n-1</sub> between two consecutive
video frame boundaries of the related video object.</p></div>
@@ -1684,15 +1690,15 @@
</tbody>
</table>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">BDraw effectively sets a limit on fillings regions - for example, assuming that the root container is
+ <div class="note"><div id="h_note_8" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">BDraw effectively sets a limit on fillings regions - for example, assuming that the root container is
ultimately rendered at 1920×1080 resolution, a BDraw of 12 s<sup>-1</sup> would correspond to a fill rate of
1920×1080×12/s=23.7×2<sup>20</sup>pixels s<sup>-1</sup>.</p></div>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">IPD effectively sets a limit on the complexity of any given intermediate synchronic document.</p></div>
+ <div class="note"><div id="h_note_9" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">IPD effectively sets a limit on the complexity of any given intermediate synchronic document.</p></div>
</section>
<section id="paint-regions">
- <h4><span class="secno">7.1.3 </span>Paint Regions</h4>
+ <h4 id="h4_paint-regions" role="heading" aria-level="3"><span class="secno">7.1.3 </span>Paint Regions</h4>
<p>The total normalized drawing area S(E<sub>n</sub>) for intermediate synchronic document E<sub>n</sub> <em title="SHALL" class="rfc2119">SHALL</em> be</p>
@@ -1700,7 +1706,7 @@
<p>where CLEAR(E<sub>0</sub>) = 0 and CLEAR(E<sub>n | n > 0</sub>) = 1, i.e. the root container in its entirety.</p>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">To ensure consistency of the Presentation Buffer, a new intermediate synchronic document requires clearing
+ <div class="note"><div id="h_note_10" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">To ensure consistency of the Presentation Buffer, a new intermediate synchronic document requires clearing
of the root container.</p></div>
<p>PAINT(E<sub>n</sub>) <em title="SHALL" class="rfc2119">SHALL</em> be the normalized area to be painted for all regions that are used in intermediate synchronic
@@ -1744,7 +1750,7 @@
</section>
<section id="paint-images">
- <h4><span class="secno">7.1.4 </span>Paint Images</h4>
+ <h4 id="h4_paint-images" role="heading" aria-level="3"><span class="secno">7.1.4 </span>Paint Images</h4>
<p>The Presentation Compositor <em title="SHALL" class="rfc2119">SHALL</em> paint into the Presentation Buffer P<sub>n</sub> all visible pixels of presented
images of intermediate synchronic document E<sub>n</sub>.</p>
@@ -1833,7 +1839,7 @@
</section>
<section id="paint-text">
- <h4><span class="secno">7.1.5 </span>Paint Text</h4>
+ <h4 id="h4_paint-text" role="heading" aria-level="3"><span class="secno">7.1.5 </span>Paint Text</h4>
<p>For each glyph displayed in intermediate synchronic document E<sub>n</sub>, the Presentation Compositor <em title="SHALL" class="rfc2119">SHALL</em>:</p>
@@ -1951,7 +1957,7 @@
</tbody>
</table>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">NRGA(G<sub>i</sub>) does not take into account glyph decorations (e.g. underline), glyph effects (e.g.
+ <div class="note"><div id="h_note_11" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">NRGA(G<sub>i</sub>) does not take into account glyph decorations (e.g. underline), glyph effects (e.g.
outline) or actual glyph aspect ratio. An implementation can determine an actual buffer size needs based on worst-case
glyph size complexity.</p></div>
@@ -1980,10 +1986,10 @@
</section><!-- start CFF-TT 1.0.7 -->
<section id="layout-model">
- <h3><span class="secno">7.2 </span>Layout Model</h3>
+ <h3 id="h3_layout-model" role="heading" aria-level="2"><span class="secno">7.2 </span>Layout Model</h3>
<section id="general-3">
- <h4><span class="secno">7.2.1 </span>General</h4>
+ <h4 id="h4_general-3" role="heading" aria-level="3"><span class="secno">7.2.1 </span>General</h4>
<p>The height and width of the area occupied by text within a region depend on line height as well as the width of, and
spacing between (kerning), individual glyphs. The following allows the area occupied by text to be precisely determined,
@@ -1991,7 +1997,7 @@
</section>
<section id="reference-fonts">
- <h4><span class="secno">7.2.2 </span>Reference Fonts</h4>
+ <h4 id="h4_reference-fonts" role="heading" aria-level="3"><span class="secno">7.2.2 </span>Reference Fonts</h4>
<p>A glyph that matches one of the combinations of computed font family and code point listed in the table below <em title="SHALL" class="rfc2119">SHALL</em> be laid out using metrics equal to the metrics of the specified reference font, unless the glyph is not defined by the
reference font.</p>
@@ -2038,14 +2044,14 @@
</tbody>
</table>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">Implementations can use use fonts other than those specified above. Two fonts with equal metrics can have a
+ <div class="note"><div id="h_note_12" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">Implementations can use use fonts other than those specified above. Two fonts with equal metrics can have a
different appearance, but flow identically.</p></div>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">proportionalSansSerif is not used in practice for Hebrew and Arabic captions and subtitles.</p></div>
+ <div class="note"><div id="h_note_13" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">proportionalSansSerif is not used in practice for Hebrew and Arabic captions and subtitles.</p></div>
</section>
<section id="line-height-and-centering">
- <h4><span class="secno">7.2.3 </span>Line Height and Centering</h4>
+ <h4 id="h4_line-height-and-centering" role="heading" aria-level="3"><span class="secno">7.2.3 </span>Line Height and Centering</h4>
<p>The computed value of <code>tts:lineHeight</code> shall be equal to 120% if tts:lineHeight="normal".</p>
@@ -2069,17 +2075,17 @@
<p>White space in excess of the largest font size on the line <em title="SHALL" class="rfc2119">SHALL</em> be allocated evenly top and bottom (half-leading). Note
that inter-baseline separation includes any leading.</p><!-- end CFF-TT 1.0.7 -->
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">Since font size can change on a line and text can wrap, it is necessary to first determine the glyphs
+ <div class="note"><div id="h_note_14" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">Since font size can change on a line and text can wrap, it is necessary to first determine the glyphs
present on a line before determining line height.</p></div>
- <div class="note"><div aria-level="5" class="note-title" role="heading"><span>Note</span></div><p class="">Glyphs that do not extend beyond the specific <code>tts:fontSize</code> value will not clip top or
+ <div class="note"><div id="h_note_15" role="heading" aria-level="4" class="note-title"><span>Note</span></div><p class="">Glyphs that do not extend beyond the specific <code>tts:fontSize</code> value will not clip top or
bottom.</p></div>
</section>
</section>
</section>
<section id="recommended-unicode-code-points-per-language" class="appendix">
- <!--OddPage--><h2><span class="secno">A. </span>Recommended Unicode Code Points per Language</h2>
+ <!--OddPage--><h2 id="h2_recommended-unicode-code-points-per-language" role="heading" aria-level="1"><span class="secno">A. </span>Recommended Unicode Code Points per Language</h2>
<p>The following table lists common code points (see [<cite><a href="#bib-UNICODE" class="bibref">UNICODE</a></cite>]) definitions used in this Appendix:</p>
@@ -2469,7 +2475,7 @@
</section>
<section id="typical-practice-for-subtitles-per-region-informative" class="appendix informative">
- <!--OddPage--><h2><span class="secno">B. </span>Typical Practice for Subtitles per Region (Informative)</h2><p><em>This section is non-normative.</em></p>
+ <!--OddPage--><h2 id="h2_typical-practice-for-subtitles-per-region-informative" role="heading" aria-level="1"><span class="secno">B. </span>Typical Practice for Subtitles per Region (Informative)</h2><p><em>This section is non-normative.</em></p>
<p>The following table summarizes subtitle languages commonly used in the listed regions. The Language Tag is as specified in
RFC 5646.</p>
@@ -2798,19 +2804,20 @@
</section>
<section id="schema" class="appendix">
- <!--OddPage--><h2><span class="secno">C. </span>Schema</h2>
+ <!--OddPage--><h2 id="h2_schema" role="heading" aria-level="1"><span class="secno">C. </span>Schema</h2>
<p><em>TBD</em></p>
</section>
-<section class="appendix" id="references"><!--OddPage--><h2><span class="secno">D. </span>References</h2><section id="normative-references"><h3><span class="secno">D.1 </span>Normative references</h3><dl class="bibliography"><dt id="bib-MHP">[MHP]</dt><dd>ETSI TS 101 812 V1.3.1, Digital Video Broadcasting (DVB); Multimedia Home
-</dd><dt id="bib-RFC2119">[RFC2119]</dt><dd>S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key words for use in RFCs to Indicate Requirement Levels.</cite></a> March 1997. Internet RFC 2119. URL: <a href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
-</dd><dt id="bib-SUBM">[SUBM]</dt><dd>World Wide Web Consortium (W3C). <a href="http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/">TTML Text and Image Profiles for Internet Media Subtitles and Captions</a> (Member Submission, 07 June 2013)
-</dd><dt id="bib-TTML2">[TTML2]</dt><dd>World Wide Web Consortium (W3C). Timed Text Markup Language 2 (TTML 2)
-</dd><dt id="bib-UNICODE">[UNICODE]</dt><dd><a href="http://www.unicode.org/versions/latest/"><cite>The Unicode Standard</cite></a>. URL: <a href="http://www.unicode.org/versions/latest/">http://www.unicode.org/versions/latest/</a>
-</dd><dt id="bib-xml-names">[xml-names]</dt><dd>Tim Bray; Dave Hollander; Andrew Layman; Richard Tobin; Henry Thompson et al. <a href="http://www.w3.org/TR/xml-names"><cite>Namespaces in XML 1.0 (Third Edition)</cite></a>. 8 December 2009. W3C Recommendation. URL: <a href="http://www.w3.org/TR/xml-names">http://www.w3.org/TR/xml-names</a>
-</dd></dl></section><section id="informative-references"><h3><span class="secno">D.2 </span>Informative references</h3><dl class="bibliography"><dt id="bib-CEA-608">[CEA-608]</dt><dd><a href="http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/Line-21-Data-Service.aspx">Line-21 Data Services</a>, ANSI/CEA Standard.
-</dd><dt id="bib-CEA-708">[CEA-708]</dt><dd><a href="http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/CEA-708-D.aspx">Digital Television (DTV) Closed Captioning</a>, ANSI/CEA Standard.
-</dd><dt id="bib-ST2052-1">[ST2052-1]</dt><dd>SMPTE ST 2052-1, Timed Text Format (SMPTE-TT)
+<section rel="bibo:chapter" resource="#references" typeof="bibo:Chapter" class="appendix" id="references"><!--OddPage--><h2 id="h2_references" role="heading" aria-level="1"><span class="secno">D. </span>References</h2><section rel="bibo:chapter" resource="#normative-references" typeof="bibo:Chapter" id="normative-references"><h3 id="h3_normative-references" role="heading" aria-level="2"><span class="secno">D.1 </span>Normative references</h3><dl about="" class="bibliography"><dt id="bib-MHP">[MHP]</dt><dd rel="dcterms:requires">ETSI TS 101 812 V1.3.1, Digital Video Broadcasting (DVB); Multimedia Home
+</dd><dt id="bib-RFC2119">[RFC2119]</dt><dd rel="dcterms:requires">S. Bradner. <a href="http://www.ietf.org/rfc/rfc2119.txt"><cite>Key words for use in RFCs to Indicate Requirement Levels.</cite></a> March 1997. Internet RFC 2119. URL: <a href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
+</dd><dt id="bib-SDPUS">[SDPUS]</dt><dd rel="dcterms:requires">World Wide Web Consortium (W3C). <a href="http://www.w3.org/TR/ttml10-sdp-us/">TTML Simple Delivery Profile for Closed Captions (US)</a> (W3C Working Group Note, 05 February 2013
+</dd><dt id="bib-SUBM">[SUBM]</dt><dd rel="dcterms:requires">World Wide Web Consortium (W3C). <a href="http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/">TTML Text and Image Profiles for Internet Media Subtitles and Captions</a> (Member Submission, 07 June 2013)
+</dd><dt id="bib-TTML2">[TTML2]</dt><dd rel="dcterms:requires">World Wide Web Consortium (W3C). Timed Text Markup Language 2 (TTML 2)
+</dd><dt id="bib-UNICODE">[UNICODE]</dt><dd rel="dcterms:requires"><a href="http://www.unicode.org/versions/latest/"><cite>The Unicode Standard</cite></a>. URL: <a href="http://www.unicode.org/versions/latest/">http://www.unicode.org/versions/latest/</a>
+</dd><dt id="bib-xml-names">[xml-names]</dt><dd rel="dcterms:requires">Tim Bray; Dave Hollander; Andrew Layman; Richard Tobin; Henry Thompson et al. <a href="http://www.w3.org/TR/xml-names"><cite>Namespaces in XML 1.0 (Third Edition)</cite></a>. 8 December 2009. W3C Recommendation. URL: <a href="http://www.w3.org/TR/xml-names">http://www.w3.org/TR/xml-names</a>
+</dd></dl></section><section rel="bibo:chapter" resource="#informative-references" typeof="bibo:Chapter" id="informative-references"><h3 id="h3_informative-references" role="heading" aria-level="2"><span class="secno">D.2 </span>Informative references</h3><dl about="" class="bibliography"><dt id="bib-CEA-608">[CEA-608]</dt><dd rel="dcterms:references"><a href="http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/Line-21-Data-Service.aspx">Line-21 Data Services</a>, ANSI/CEA Standard.
+</dd><dt id="bib-CEA-708">[CEA-708]</dt><dd rel="dcterms:references"><a href="http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/CEA-708-D.aspx">Digital Television (DTV) Closed Captioning</a>, ANSI/CEA Standard.
+</dd><dt id="bib-ST2052-1">[ST2052-1]</dt><dd rel="dcterms:references">SMPTE ST 2052-1, Timed Text Format (SMPTE-TT)
</dd></dl></section></section></body></html>
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