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+ <title>Timed Text (TT) Authoring Format 1.0 – Distribution Format Exchange
+ Profile (DFXP)</title>
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+ </head>
+ <body>
+ <div 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></p>
+ <h1><a name="title" id="title"></a>Timed Text (TT) Authoring Format 1.0 –
+ Distribution Format Exchange Profile (DFXP)</h1>
+ <h2><a name="w3c-doctype" id="w3c-doctype"></a>W3C Candidate Recommendation 10
+ November 2006</h2>
+ <dl>
+ <dt>This version:</dt>
+ <dd><a
+ href="http://www.w3.org/TR/2006/CR-ttaf1-dfxp-20061110/">http://www.w3.org/TR/2006/CR-ttaf1-dfxp-20061110/</a></dd>
+ <dt>Latest version:</dt>
+ <dd><a
+ href="http://www.w3.org/TR/ttaf1-dfxp/">http://www.w3.org/TR/ttaf1-dfxp/</a></dd>
+ <dt>Previous version:</dt>
+ <dd><a
+ href="http://www.w3.org/TR/2006/WD-ttaf1-dfxp-20060427/">http://www.w3.org/TR/2006/WD-ttaf1-dfxp-20060427/</a></dd>
+ <dt>Editor:</dt>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>Glenn Adams, Extensible Formatting Systems, Inc. (XFSI)</td>
+ <td><img src="images/ga.png" alt="glenn at x f s i dot com" /></td>
+ </tr>
+ </table>
+ </dd>
+ <dt>Contributing Authors:</dt>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>Mike Dolan, Invited Expert</td>
+ <td><img src="images/md.png" alt="m dolan at new t b t dot com" /></td>
+ </tr>
+ </table>
+ </dd>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>Geoff Freed, WGBH National Center for Accessible Media</td>
+ <td><img src="images/gf.png"
+ alt="geoff underbar freed at w g b h dot org" /></td>
+ </tr>
+ </table>
+ </dd>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>Sean Hayes, Microsoft</td>
+ <td><img src="images/sh.png"
+ alt="sean dot hayes at microsoft dot com" /></td>
+ </tr>
+ </table>
+ </dd>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>Erik Hodge, RealNetworks</td>
+ <td><img src="images/eh.png" alt="e hodge at real dot com" /></td>
+ </tr>
+ </table>
+ </dd>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>David Kirby, British Broadcasting Corporation (BBC)</td>
+ <td><img src="images/dk.png"
+ alt="david dot kirby at r d dot b b c dot c o dot u k" /></td>
+ </tr>
+ </table>
+ </dd>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>Thierry Michel, W3C</td>
+ <td><img src="images/tm.png" alt="t michel at w 3 dot org" /></td>
+ </tr>
+ </table>
+ </dd>
+ <dd>
+ <table style="margin: 0em 0em">
+ <tr>
+ <td>Dave Singer, Apple Computer</td>
+ <td><img src="images/ds.png" alt="singer at apple dot com" /></td>
+ </tr>
+ </table>
+ </dd>
+ </dl>
+<p class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a> © 2006 <a href="http://www.w3.org/"><acronym title="World Wide Web Consortium">W3C</acronym></a><sup>®</sup> (<a href="http://www.csail.mit.edu/"><acronym title="Massachusetts Institute of Technology">MIT</acronym></a>, <a href="http://www.ercim.org/"><acronym title="European Research Consortium for Informatics and Mathematics">ERCIM</acronym></a>, <a href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved. W3C <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.</p>
+ </div>
+ <hr />
+ <div>
+ <h2><a name="abstract" id="abstract"></a>Abstract</h2>
+ <p>This document specifies the distribution format exchange profile (DFXP) of the
+ timed text authoring format (TT AF) in terms of a vocabulary and semantics
+ thereof.</p>
+ <p>The timed text authoring format is a content type that represents timed text
+ media for the purpose of interchange among authoring systems. Timed text is textual
+ information that is intrinsically or extrinsically associated with timing
+ information.</p>
+ <p>The Distribution Format Exchange Profile is intended to be used for the purpose
+ of transcoding or exchanging timed text information among legacy distribution
+ content formats presently in use for subtitling and captioning functions.</p>
+ <p>In addition to being used for interchange among legacy distribution content
+ formats, DFXP content may be used directly as a distribution format, for example,
+ providing a standard content format to reference from a <code><text></code>
+ or <code><textstream></code> media object element in a <a
+ href="#smil21">[SMIL 2.1]</a> document.</p>
+ </div>
+ <div>
+ <h2><a name="status" id="status"></a>Status of this Document</h2>
+ <p><em>This section describes the status of this document at the time of its
+ publication. Other documents may supersede this document. A list of current W3C
+ publications and the latest revision of this technical report can be found in the
+ <a href="http://www.w3.org/TR/">W3C technical reports index</a> at
+ http://www.w3.org/TR/.</em></p>
+ <p>This is the 10 November 2006 Candidate Recommendation of the Timed Text
+ (TT) Authoring Format 1.0 – Distribution Format Exchange Profile (DFXP). W3C
+ publishes a Candidate Recommendation to indicate that the document is believed to
+ be stable and to encourage implementation by the developer community. The <a
+ href="http://www.w3.org/AudioVideo/TT/">Timed Text (TT) Working Group</a> expects
+ to request that the Director advance this document to Proposed Recommendation once
+ the Working Group has, for each test in the <a
+ href="http://www.w3.org/2006/DFXP/testsuite/Overview.html">DFXP
+ 1.0 Test Suite</a>,
+ demonstrated support by two interoperable implementations. The Working
+ Group, working closely with the developer community, expects to show these
+ implementations by 01 March 2007. This estimate is based in part on the preliminary
+ <a href="http://www.w3.org/2006/DFXP/DFXP-implementation-result.html">DFXP
+ Interoperability Implementation Report</a>. The Working Group does not plan to
+ request to advance to Proposed Recommendation prior to 01 April 2007.</p>
+ <p>This is a W3C Candidate Recommendation. The second Last Call Working Draft for
+ this specification resulted in a number of Last Call comments which have all been
+ addressed by the working group; a list of all Last Call comments can be found in
+ the <a href="http://www.w3.org/2005/03/21/DFXP-2ND-LastCallResponses.html">Second
+ Last Call Comments List</a>. The list of changes made since the last public Working
+ Draft is available in <a href="#change-history-lc2-to-cr"><b>M.2 Changes from
+ Second Last Call Working Draft to Candidate Recommendation</b></a>.</p>
+ <p>During the first Last Call period of this specification, there were <a
+ href="http://lists.w3.org/Archives/Public/public-tt/2005Apr/0040.html">unsatisfied
+ comments</a> that the working group was unable to resolve in a manner that satisfied
+ the commenter(s). The status of these comments has not changed during the second
+ Last Call period, as the working group continues to stand by its <a
+ href="http://lists.w3.org/Archives/Public/public-tt/2005Oct/0000.html">original
+ responses</a>. See also the <a
+ href="http://www.w3.org/2005/03/21/DFXPLastCallResponses.html#Issue11">First
+ Last Call Disposition of Comments</a> for a complete discussion.</p>
+ <p>The <em>dynamic flow processing</em> feature, as specified by the <a
+ href="#style-attribute-dynamicFlow"><code>tts:dynamicFlow</code></a> styling
+ attribute vocabulary, see also <a href="#dynamicFlowModel"><b>B Dynamic Flow
+ Processing Model</b></a>, has been determined to be <a
+ href="http://www.w3.org/2005/10/Process-20051014/tr.html#at-risk-feature">at
+ risk</a>, and is expected to be given the greatest scrutiny in the implementation
+ report.</p>
+ <p>Comments on this document should be sent to the email list <a
+ href="mailto:[email protected]">[email protected]</a>, which is the public mailing
+ list of Timed Text Working Group (<a
+ href="http://lists.w3.org/Archives/Public/public-tt/">list archives</a>). To
+ subscribe, send an email to <a
+ href="mailto:[email protected]">[email protected]</a> with the word
+ <code>subscribe</code> in the subject line.</p>
+ <p>This document has been produced by the <a
+ href="http://www.w3.org/AudioVideo/TT/">Timed Text (TT) Working Group</a> as part
+ of the W3C <a href="http://www.w3.org/AudioVideo/Activity">Synchronized Multimedia
+ Activity</a>, following the procedures set out for the W3C <a
+ href="http://www.w3.org/Consortium/Process/">Process</a>. The authors of this
+ document are listed in the header of this document.</p>
+<p> This document is governed by the <a href="http://www.w3.org/TR/2002/NOTE-patent-practice-20020124">24 January 2002 CPP</a> as amended by the <a href="http://www.w3.org/2004/02/05-pp-transition">W3C Patent Policy Transition Procedure</a>. W3C maintains a <a rel="disclosure" href="http://www.w3.org/2003/01/Timed-text-Patent-statements.html">public list of any patent disclosures</a> made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential Claim(s)</a> must disclose the information in accordance with <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section 6 of the W3C Patent Policy</a>. </p>
+ <p>Publication as a Candidate Recommendation does not imply endorsement by the W3C
+ 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.</p>
+ </div>
+ <div class="toc">
+ <h2><a name="contents" id="contents"></a>Table of Contents</h2>
+ <p class="toc">1 <a href="#intro">Introduction</a><br />
+ 1.1 <a href="#model">System Model</a><br />
+ 1.2 <a href="#example">Document Example</a><br />
+ 2 <a href="#definitions">Definitions</a><br />
+ 2.1 <a href="#acronyms">Acronyms</a><br />
+ 2.2 <a href="#terms">Terminology</a><br />
+ 2.3 <a href="#conventions">Documentation
+ Conventions</a><br />
+ 3 <a href="#conformance">Conformance</a><br />
+ 3.1 <a href="#conformance-content">Content
+ Conformance</a><br />
+ 3.2 <a href="#conformance-processor">Processor
+ Conformance</a><br />
+ 3.3 <a href="#claims">Claims</a><br />
+ 4 <a href="#doctypes">Document Types</a><br />
+ 4.1 <a href="#dfxp-content-doctype">DFXP Content</a><br />
+ 5 <a href="#vocabulary">Vocabulary</a><br />
+ 5.1 <a href="#vocabulary-namespaces">Namespaces</a><br />
+ 5.2 <a href="#vocabulary-profiles">Profiles</a><br />
+ 5.3 <a href="#vocabulary-overview">Catalog</a><br />
+ 5.3.1 <a
+ href="#core-vocabulary-overview">Core Catalog</a><br />
+ 5.3.2 <a
+ href="#extension-vocabulary-overview">Extension Catalog</a><br />
+ 6 <a href="#parameters">Parameters</a><br />
+ 6.1 <a href="#parameters-element-vocabulary">Element
+ Vocabulary</a><br />
+ 6.2 <a href="#parameters-attribute-vocabulary">Attribute
+ Vocabulary</a><br />
+ 6.2.1 <a
+ href="#parameter-attribute-cellResolution">ttp:cellResolution</a><br />
+ 6.2.2 <a
+ href="#parameter-attribute-clockMode">ttp:clockMode</a><br />
+ 6.2.3 <a
+ href="#parameter-attribute-frameRate">ttp:frameRate</a><br />
+ 6.2.4 <a
+ href="#parameter-attribute-frameRateMultiplier">ttp:frameRateMultiplier</a><br />
+ 6.2.5 <a
+ href="#parameter-attribute-markerMode">ttp:markerMode</a><br />
+ 6.2.6 <a
+ href="#parameter-attribute-pixelAspectRatio">ttp:pixelAspectRatio</a><br />
+ 6.2.7 <a
+ href="#parameter-attribute-profile">ttp:profile</a><br />
+ 6.2.8 <a
+ href="#parameter-attribute-smpteMode">ttp:smpteMode</a><br />
+ 6.2.9 <a
+ href="#parameter-attribute-subFrameRate">ttp:subFrameRate</a><br />
+ 6.2.10 <a
+ href="#parameter-attribute-tickRate">ttp:tickRate</a><br />
+ 6.2.11 <a
+ href="#parameter-attribute-timeBase">ttp:timeBase</a><br />
+ 7 <a href="#content">Content</a><br />
+ 7.1 <a href="#content-element-vocabulary">Element
+ Vocabulary</a><br />
+ 7.1.1 <a
+ href="#document-structure-vocabulary-tt">tt</a><br />
+ 7.1.2 <a
+ href="#document-structure-vocabulary-head">head</a><br />
+ 7.1.3 <a
+ href="#document-structure-vocabulary-body">body</a><br />
+ 7.1.4 <a
+ href="#content-vocabulary-div">div</a><br />
+ 7.1.5 <a
+ href="#content-vocabulary-p">p</a><br />
+ 7.1.6 <a
+ href="#content-vocabulary-span">span</a><br />
+ 7.1.7 <a
+ href="#content-vocabulary-br">br</a><br />
+ 7.2 <a href="#content-attribute-vocabulary">Attribute
+ Vocabulary</a><br />
+ 7.2.1 <a
+ href="#content-attribute-id">xml:id</a><br />
+ 7.2.2 <a
+ href="#content-attribute-lang">xml:lang</a><br />
+ 7.2.3 <a
+ href="#content-attribute-space">xml:space</a><br />
+ 8 <a href="#styling">Styling</a><br />
+ 8.1 <a href="#styling-element-vocabulary">Element
+ Vocabulary</a><br />
+ 8.1.1 <a
+ href="#styling-vocabulary-styling">styling</a><br />
+ 8.1.2 <a
+ href="#styling-vocabulary-style">style</a><br />
+ 8.2 <a href="#styling-attribute-vocabulary">Attribute
+ Vocabulary</a><br />
+ 8.2.1 <a
+ href="#style-attribute-style">style</a><br />
+ 8.2.2 <a
+ href="#style-attribute-backgroundColor">tts:backgroundColor</a><br />
+ 8.2.3 <a
+ href="#style-attribute-color">tts:color</a><br />
+ 8.2.4 <a
+ href="#style-attribute-direction">tts:direction</a><br />
+ 8.2.5 <a
+ href="#style-attribute-display">tts:display</a><br />
+ 8.2.6 <a
+ href="#style-attribute-displayAlign">tts:displayAlign</a><br />
+ 8.2.7 <a
+ href="#style-attribute-dynamicFlow">tts:dynamicFlow</a><br />
+ 8.2.8 <a
+ href="#style-attribute-extent">tts:extent</a><br />
+ 8.2.9 <a
+ href="#style-attribute-fontFamily">tts:fontFamily</a><br />
+ 8.2.10 <a
+ href="#style-attribute-fontSize">tts:fontSize</a><br />
+ 8.2.11 <a
+ href="#style-attribute-fontStyle">tts:fontStyle</a><br />
+ 8.2.12 <a
+ href="#style-attribute-fontWeight">tts:fontWeight</a><br />
+ 8.2.13 <a
+ href="#style-attribute-lineHeight">tts:lineHeight</a><br />
+ 8.2.14 <a
+ href="#style-attribute-opacity">tts:opacity</a><br />
+ 8.2.15 <a
+ href="#style-attribute-origin">tts:origin</a><br />
+ 8.2.16 <a
+ href="#style-attribute-overflow">tts:overflow</a><br />
+ 8.2.17 <a
+ href="#style-attribute-padding">tts:padding</a><br />
+ 8.2.18 <a
+ href="#style-attribute-showBackground">tts:showBackground</a><br />
+ 8.2.19 <a
+ href="#style-attribute-textAlign">tts:textAlign</a><br />
+ 8.2.20 <a
+ href="#style-attribute-textDecoration">tts:textDecoration</a><br />
+ 8.2.21 <a
+ href="#style-attribute-textOutline">tts:textOutline</a><br />
+ 8.2.22 <a
+ href="#style-attribute-unicodeBidi">tts:unicodeBidi</a><br />
+ 8.2.23 <a
+ href="#style-attribute-visibility">tts:visibility</a><br />
+ 8.2.24 <a
+ href="#style-attribute-wrapOption">tts:wrapOption</a><br />
+ 8.2.25 <a
+ href="#style-attribute-writingMode">tts:writingMode</a><br />
+ 8.2.26 <a
+ href="#style-attribute-zIndex">tts:zIndex</a><br />
+ 8.3 <a href="#styling-style-value-expressions">Style Value
+ Expressions</a><br />
+ 8.3.1 <a
+ href="#style-value-alpha"><alpha></a><br />
+ 8.3.2 <a
+ href="#style-value-color"><color></a><br />
+ 8.3.3 <a
+ href="#style-value-digit"><digit></a><br />
+ 8.3.4 <a
+ href="#style-value-duration"><duration></a><br />
+ 8.3.5 <a
+ href="#style-value-familyName"><familyName></a><br />
+ 8.3.6 <a
+ href="#style-value-genericFamilyName"><genericFamilyName></a><br />
+ 8.3.7 <a
+ href="#style-value-flowFunction"><flowFunction></a><br />
+ 8.3.8 <a
+ href="#style-value-flowIntervalFunction"><flowIntervalFunction></a><br />
+ 8.3.9 <a
+ href="#style-value-hexDigit"><hexDigit></a><br />
+ 8.3.10 <a
+ href="#style-value-integer"><integer></a><br />
+ 8.3.11 <a
+ href="#style-value-length"><length></a><br />
+ 8.3.12 <a
+ href="#style-value-namedColor"><namedColor></a><br />
+ 8.3.13 <a
+ href="#style-value-quotedString"><quotedString></a><br />
+ 8.3.14 <a
+ href="#style-value-string"><string></a><br />
+ 8.4 <a href="#semantics-style-association">Style
+ Association</a><br />
+ 8.4.1 <a
+ href="#semantics-style-association-inline">Inline Styling</a><br />
+ 8.4.2 <a
+ href="#semantics-style-association-referential">Referential Styling</a><br />
+ 8.4.3 <a
+ href="#semantics-style-association-chained-referential">Chained Referential
+ Styling</a><br />
+ 8.5 <a href="#semantics-style-inheritance">Style
+ Inheritance</a><br />
+ 8.5.1 <a
+ href="#semantics-style-inheritance-content">Content Style Inheritance</a><br />
+ 8.5.2 <a
+ href="#semantics-style-inheritance-region">Region Style Inheritance</a><br />
+ 9 <a href="#layout">Layout</a><br />
+ 9.1 <a href="#layout-element-vocabulary">Element
+ Vocabulary</a><br />
+ 9.1.1 <a
+ href="#layout-vocabulary-layout">layout</a><br />
+ 9.1.2 <a
+ href="#layout-vocabulary-region">region</a><br />
+ 9.2 <a href="#layout-attribute-vocabulary">Attribute
+ Vocabulary</a><br />
+ 9.2.1 <a
+ href="#layout-attribute-region">region</a><br />
+ 9.3 <a href="#semantics-region-layout">Region Layout and
+ Presentation</a><br />
+ 9.3.1 <a
+ href="#semantics-region-layout-step-1">Synchronic Region Construction</a><br />
+ 9.3.2 <a
+ href="#semantics-region-layout-step-2">Synchronic Flow Processing</a><br />
+ 9.3.3 <a
+ href="#semantics-region-layout-example">Elaborated Example</a><br />
+ 9.4 <a href="#semantics-line-layout">Line Layout</a><br />
+ 10 <a href="#timing">Timing</a><br />
+ 10.1 <a href="#timing-element-vocabulary">Element
+ Vocabulary</a><br />
+ 10.2 <a href="#timing-attribute-vocabulary">Attribute
+ Vocabulary</a><br />
+ 10.2.1 <a
+ href="#timing-attribute-begin">begin</a><br />
+ 10.2.2 <a
+ href="#timing-attribute-end">end</a><br />
+ 10.2.3 <a
+ href="#timing-attribute-dur">dur</a><br />
+ 10.2.4 <a
+ href="#timing-attribute-timeContainer">timeContainer</a><br />
+ 10.3 <a href="#timing-time-value-expressions">Time Value
+ Expressions</a><br />
+ 10.3.1 <a
+ href="#timing-value-timeExpression"><timeExpression></a><br />
+ 10.4 <a href="#timing-time-intervals">Time
+ Intervals</a><br />
+ 11 <a href="#animation">Animation</a><br />
+ 11.1 <a href="#animation-element-vocabulary">Element
+ Vocabulary</a><br />
+ 11.1.1 <a
+ href="#animation-vocabulary-set">set</a><br />
+ 11.2 <a href="#animation-attribute-vocabulary">Attribute
+ Vocabulary</a><br />
+ 12 <a href="#metadata">Metadata</a><br />
+ 12.1 <a href="#metadata-element-vocabulary">Element
+ Vocabulary</a><br />
+ 12.1.1 <a
+ href="#metadata-vocabulary-metadata">metadata</a><br />
+ 12.1.2 <a
+ href="#metadata-vocabulary-title">ttm:title</a><br />
+ 12.1.3 <a
+ href="#metadata-vocabulary-desc">ttm:desc</a><br />
+ 12.1.4 <a
+ href="#metadata-vocabulary-copyright">ttm:copyright</a><br />
+ 12.1.5 <a
+ href="#metadata-vocabulary-agent">ttm:agent</a><br />
+ 12.1.6 <a
+ href="#metadata-vocabulary-name">ttm:name</a><br />
+ 12.1.7 <a
+ href="#metadata-vocabulary-actor">ttm:actor</a><br />
+ 12.2 <a href="#metadata-attribute-vocabulary">Attribute
+ Vocabulary</a><br />
+ 12.2.1 <a
+ href="#metadata-attribute-agent">ttm:agent</a><br />
+ 12.2.2 <a
+ href="#metadata-attribute-role">ttm:role</a><br />
+ </p>
+ <h3><a name="appendices" id="appendices"></a>Appendices</h3>
+ <p class="toc">A <a href="#reduced-infoset">Reduced XML Infoset</a><br />
+ A.1 <a href="#reduced-infoset-document">Document
+ Information Item</a><br />
+ A.2 <a href="#reduced-infoset-element">Element Information
+ Item</a><br />
+ A.3 <a href="#reduced-infoset-attribute">Attribute
+ Information Item</a><br />
+ A.4 <a href="#reduced-infoset-character">Character
+ Information Item</a><br />
+ B <a href="#dynamicFlowModel">Dynamic Flow Processing Model</a><br />
+ B.1 <a
+ href="#dynamicFlowIntroduction">Introduction</a><br />
+ B.2 <a href="#dynamicFlowEvents">Flow Buffer</a><br />
+ B.3 <a href="#dynamicFlowIntervalTimingCalculation">Flow
+ Interval Timing Calculation</a><br />
+ B.3.1 <a
+ href="#flowIntervalFillTiming">Computed Fill Timing Interval</a><br />
+ B.3.2 <a
+ href="#flowIntervalClearTiming">Computed Clear Timing Interval</a><br />
+ B.4 <a href="#dynamicFlowOperations">Flow
+ Operations</a><br />
+ B.4.1 <a
+ href="#flowOperationFill">Fill Operation</a><br />
+ B.4.2 <a
+ href="#flowOperationReflow">Reflow Operation</a><br />
+ B.4.3 <a
+ href="#flowOperationClear">Clear Operation</a><br />
+ B.5 <a href="#dynamicFlowTimers">Flow Timers</a><br />
+ B.5.1 <a href="#flowTimerFill">Fill
+ Timer</a><br />
+ B.5.2 <a
+ href="#flowTimerClear">Clear Timer</a><br />
+ C <a href="#schemas">Schemas</a><br />
+ C.1 <a href="#dfxp-schema-rnc">Relax NG Schema</a><br />
+ C.1.1 <a
+ href="#rnc-dfxp-driver-schema">Driver</a><br />
+ C.1.2 <a
+ href="#rnc-dfxp-modules">Modules</a><br />
+ C.1.2.1 <a
+ href="#rnc-dfxp-animation-module">Animation Module</a><br />
+ C.1.2.2 <a
+ href="#rnc-dfxp-classes-module">Classes Module</a><br />
+ C.1.2.3 <a
+ href="#rnc-dfxp-content-module">Content Module</a><br />
+ C.1.2.4 <a
+ href="#rnc-dfxp-core-attribs-module">Core Attributes Module</a><br />
+ C.1.2.5 <a
+ href="#rnc-dfxp-datatypes-module">Data Types Module</a><br />
+ C.1.2.6 <a
+ href="#rnc-dfxp-document-module">Document Module</a><br />
+ C.1.2.7 <a
+ href="#rnc-dfxp-head-module">Header Module</a><br />
+ C.1.2.8 <a
+ href="#rnc-dfxp-layout-module">Layout Module</a><br />
+ C.1.2.9 <a
+ href="#rnc-dfxp-metdata-module">Metadata Module</a><br />
+ C.1.2.10 <a
+ href="#rnc-dfxp-metdata-items-module">Metadata Items Module</a><br />
+ C.1.2.11 <a
+ href="#rnc-dfxp-metadata-attribs-module">Metadata Attributes Module</a><br />
+ C.1.2.12 <a
+ href="#rnc-dfxp-parameter-attribs-module">Parameter Attributes Module</a><br />
+ C.1.2.13 <a
+ href="#rnc-dfxp-styling-attribs-module">Styling Attributes Module</a><br />
+ C.1.2.14 <a
+ href="#rnc-dfxp-styling-module">Styling Module</a><br />
+ C.1.2.15 <a
+ href="#rnc-dfxp-timing-attribs-module">Timing Attributes Module</a><br />
+ C.2 <a href="#dfxp-schema-xsd">XML Schema Definition (XSD)
+ Schema</a><br />
+ C.2.1 <a
+ href="#xsd-dfxp-driver-schema">Driver</a><br />
+ C.2.2 <a
+ href="#xsd-dfxp-modules">Modules</a><br />
+ C.2.2.1 <a
+ href="#xsd-dfxp-animation-module">Animation Module</a><br />
+ C.2.2.2 <a
+ href="#xsd-dfxp-content-module">Content Module</a><br />
+ C.2.2.3 <a
+ href="#xsd-dfxp-core-attribs-module">Core Attributes Module</a><br />
+ C.2.2.4 <a
+ href="#xsd-dfxp-datatypes-module">Data Types Module</a><br />
+ C.2.2.5 <a
+ href="#xsd-dfxp-document-module">Document Module</a><br />
+ C.2.2.6 <a
+ href="#xsd-dfxp-head-module">Header Module</a><br />
+ C.2.2.7 <a
+ href="#xsd-dfxp-layout-module">Layout Module</a><br />
+ C.2.2.8 <a
+ href="#xsd-dfxp-metdata-module">Metadata Module</a><br />
+ C.2.2.9 <a
+ href="#xsd-dfxp-metdata-items-module">Metadata Items Module</a><br />
+ C.2.2.10 <a
+ href="#xsd-dfxp-metadata-attribs-module">Metadata Attributes Module</a><br />
+ C.2.2.11 <a
+ href="#xsd-dfxp-parameter-attribs-module">Parameter Attributes Module</a><br />
+ C.2.2.12 <a
+ href="#xsd-dfxp-styling-attribs-module">Styling Attributes Module</a><br />
+ C.2.2.13 <a
+ href="#xsd-dfxp-styling-module">Styling Module</a><br />
+ C.2.2.14 <a
+ href="#xsd-dfxp-timing-attribs-module">Timing Attributes Module</a><br />
+ C.2.2.15 <a
+ href="#xsd-dfxp-xml-attrs-module">XML Attributes Module</a><br />
+ D <a href="#media-type-registration">Media Type Registration</a><br />
+ E <a href="#references">References</a><br />
+ F <a href="#other-references">Other References</a> (Non-Normative)<br />
+ G <a href="#sample-code">Sample Code</a> (Non-Normative)<br />
+ G.1 <a href="#code-rxi">Reduced XML Infoset (RXI)
+ – RXI.SCM</a><br />
+ G.2 <a href="#code-adi">Abstract Document Instance (ADI)
+ – ADI.SCM</a><br />
+ G.3 <a href="#code-tir">Time Interval Resolver (TIR)
+ – TIR.SCM</a><br />
+ G.4 <a href="#code-fox">Flow Object Transformer (FOX)
+ – FOX.SCM</a><br />
+ G.5 <a href="#code-dtf">Dynamic Text Flow Processor (DTF)
+ – DTF.SCM</a><br />
+ G.6 <a href="#code-run">Sample Compile, Load, and Run
+ Session</a><br />
+ H <a href="#requirements">Requirements</a> (Non-Normative)<br />
+ I <a href="#derivation">Vocabulary Derivation</a> (Non-Normative)<br />
+ I.1 <a href="#IDA4XGQ">Element Derivation</a><br />
+ I.2 <a href="#IDA3IHQ">Attribute Derivation</a><br />
+ J <a href="#qa">QA Framework Compliance</a> (Non-Normative)<br />
+ J.1 <a href="#IDAZMIQ">Requirements</a><br />
+ J.2 <a href="#IDA0WIQ">Guidelines</a><br />
+ K <a href="#streaming">Streaming DFXP Content</a> (Non-Normative)<br />
+ L <a href="#acknowledgements">Acknowledgments</a> (Non-Normative)<br />
+ M <a href="#change-history">Change History</a> (Non-Normative)<br />
+ M.1 <a href="#change-history-lc1-to-lc2">Changes from First
+ to Second Last Call Working Draft</a><br />
+ M.2 <a href="#change-history-lc2-to-cr">Changes from Second
+ Last Call Working Draft to Candidate Recommendation</a><br />
+ </p>
+ </div>
+ <hr />
+ <div class="body">
+ <div class="div1">
+ <h2><a name="intro" id="intro"></a>1 Introduction</h2>
+ <p><em>Unless specified otherwise, this section and its sub-sections are
+ non-normative.</em></p>
+ <p>The Timed Text Authoring Format (TT AF) Distribution Format Exchange Profile
+ (DFXP) provides a standardized representation of a particular subset of textual
+ information with which stylistic, layout, and timing semantics are associated by
+ an author or an authoring system for the purpose of interchange and potential
+ presentation.</p>
+ <p>DFXP is expressly designed to meet only a limited set of requirements
+ established by <a href="#ttaf1-req">[TTAF1-REQ]</a>, and summarized in <a
+ href="#requirements"><b>H Requirements</b></a>. In particular, only those
+ requirements which service the need of performing interchange with existing,
+ legacy distribution systems are satisfied.</p>
+ <p>In addition to being used for interchange among legacy distribution content
+ formats, DFXP content may be used directly as a distribution format, providing,
+ for example, a standard content format to reference from a
+ <code><text></code> or <code><textstream></code> media object element
+ in a <a href="#smil21">[SMIL 2.1]</a> document. Certain properties of DFXP
+ support streamability of content, as described in <a href="#streaming"><b>K
+ Streaming DFXP Content</b></a>.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>While DFXP was not expressly designed for direct (embedded) integration into
+ a SMIL document instance, such integration is not precluded.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>In some contexts of use, it may be appropriate to employ animated content to
+ depict sign language representations of the same content as expressed by a
+ Timed Text document instance. This use case is not explicitly addressed by DFXP
+ mechanisms, but may be addressed by some external multimedia integration
+ technology, such as SMIL.</p>
+ </div>
+ <div class="div2">
+ <h3><a name="model" id="model"></a>1.1 System Model</h3>
+ <p>Use of DFXP is intended to function in a wider context of Timed Text
+ Authoring and Distribution mechanisms that are based upon a system model,
+ depicted in <a href="#model-graphic"><b>Figure 1 – System Model</b></a>,
+ wherein the timed text authoring format serves as a bidirectional interchange
+ format among a heterogeneous collection of authoring systems, and as a
+ unidirectional interchange format to a heterogeneous collection of distribution
+ formats after undergoing transcoding or compilation to the target distribution
+ formats as required, and where one particular distribution format is DFXP.</p>
+ <table summary="HTML Table" id="model-graphic" class="example-images">
+ <caption>
+ Figure 1 – System Model
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/model.png"
+ alt="System Model" /></td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div2">
+ <h3><a name="example" id="example"></a>1.2 Document Example</h3>
+ <p>A DFXP document instance consists of a <code>tt</code> document element that
+ contains a header and a body, where the header specifies document level
+ metadata, styling definitions and layout definitions, and the body specifies
+ text content intermixed with references to style and layout information and
+ inline timing information.</p>
+ <table summary="HTML Table" id="dfxp-example-document-structure"
+ class="example">
+ <caption>
+ Example Fragment – DFXP Document Structure
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<tt xml:lang="" xmlns="http://www.w3.org/2006/10/ttaf1">
+ <head>
+ <metadata/>
+ <styling/>
+ <layout/>
+ </head>
+ <body/>
+</tt>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>Document level metadata may specify a document title, description, and
+ copyright information. In addition, arbitrary metadata drawn from other
+ namespaces may be specified.</p>
+ <table summary="HTML Table" id="dfxp-example-metadata" class="example">
+ <caption>
+ Example Fragment – DFXP Metadata
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<metadata xmlns:ttm="http://www.w3.org/2006/10/ttaf1#metadata">
+ <ttm:title>Timed Text DFXP Example</ttm:title>
+ <ttm:copyright>The Authors (c) 2006</ttm:copyright>
+</metadata>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>Styling information may be specified in the form of style specification
+ definitions that are referenced by layout and content information.</p>
+ <p>In <a href="#dfxp-example-styling"><b>Example Fragment – DFXP
+ Styling</b></a>, four style sets of specifications are defined, with one set
+ serving as a collection of default styles.</p>
+ <table summary="HTML Table" id="dfxp-example-styling" class="example">
+ <caption>
+ Example Fragment – DFXP Styling
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<styling xmlns:tts="http://www.w3.org/2006/10/ttaf1#style">
+ <!-- s1 specifies default color, font, and text alignment -->
+ <style xml:id="s1"
+ tts:color="white"
+ tts:fontFamily="proportionalSansSerif"
+ tts:fontSize="22px"
+ tts:textAlign="center"
+ />
+ <!-- alternative using yellow text but otherwise the same as style s1 -->
+ <style xml:id="s2" style="s1" tts:color="yellow"/>
+ <!-- a style based on s1 but justified to the right -->
+ <style xml:id="s1Right" style="s1" tts:textAlign="end" />
+ <!-- a style based on s2 but justified to the left -->
+ <style xml:id="s2Left" style="s2" tts:textAlign="start" />
+</styling>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>Layout information defines one or more regions into which content is
+ intended to be presented. A region definition may reference one or more sets of
+ style specifications in order to permit content flowed in the region to inherit
+ from these styles. In <a href="#dfxp-example-layout"><b>Example Fragment – DFXP
+ Layout</b></a>, the region definition makes reference to style specification
+ <code>s1</code> which allows all content flowed into the region to inherit from
+ the region's styles (in the case that a style is not already explicitly
+ specified on content or inherited via the content hierarchy.)</p>
+ <table summary="HTML Table" id="dfxp-example-layout" class="example">
+ <caption>
+ Example Fragment – DFXP Layout
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<layout xmlns:tts="http://www.w3.org/2006/10/ttaf1#style">
+ <region xml:id="subtitleArea"
+ style="s1"
+ tts:extent="560px 62px"
+ tts:padding="5px 3px"
+ tts:backgroundColor="black"
+ tts:displayAlign="after"
+ />
+</layout>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The content of a DFXP document instance is expressed in its body, which is
+ organized in terms of block and inline text elements. The hierarchical
+ organization of content elements serves a primary role in determining both
+ spatial and temporal relationships. For example, in <a
+ href="#dfxp-example-body"><b>Example Fragment – DFXP Body</b></a>, each
+ paragraph (<code>p</code> element) is flowed into its target region in the
+ specified lexical order; furthermore, the active time interval of each
+ paragraph is timed in accordance to its parent or sibling according to the
+ applicable time containment semantics — in this case, the division parent is
+ interpreted as a parallel time container.</p>
+ <table summary="HTML Table" id="dfxp-example-body" class="example">
+ <caption>
+ Example Fragment – DFXP Body
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<body region="subtitleArea">
+ <div>
+ <p xml:id="subtitle1" begin="0.76s" end="3.45s">
+ It seems a paradox, does it not,
+ </p>
+ <p xml:id="subtitle2" begin="5.0s" end="10.0s">
+ that the image formed on<br/>
+ the Retina should be inverted?
+ </p>
+ <p xml:id="subtitle3" begin="10.0s" end="16.0s" style="s2">
+ It is puzzling, why is it<br/>
+ we do not see things upside-down?
+ </p>
+ <p xml:id="subtitle4" begin="17.2s" end="23.0s">
+ You have never heard the Theory,<br/>
+ then, that the Brain also is inverted?
+ </p>
+ <p xml:id="subtitle5" begin="23.0s" end="27.0s" style="s2">
+ No indeed! What a beautiful fact!
+ </p>
+ <p xml:id="subtitle6a" begin="28.0s" end="34.6s" style="s2Left">
+ But how is it proved?
+ </p>
+ <p xml:id="subtitle6b" begin="28.0s" end="34.6s" style="s1Right">
+ Thus: what we call
+ </p>
+ <p xml:id="subtitle7" begin="34.6s" end="45.0s" style="s1Right">
+ the vertex of the Brain<br/>
+ is really its base
+ </p>
+ <p xml:id="subtitle8" begin="45.0s" end="52.0s" style="s1Right">
+ and what we call its base<br/>
+ is really its vertex,
+ </p>
+ <p xml:id="subtitle9a" begin="53.5s" end="58.7s">
+ it is simply a question of nomenclature.
+ </p>
+ <p xml:id="subtitle9b" begin="53.5s" end="58.7s" style="s2">
+ How truly delightful!
+ </p>
+ </div>
+</body>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The first subtitle <a href="#dfxp-example-subtitle-1"><b>Subtitle 1 – Time
+ Interval [0.76, 3.45)</b></a> is presented during the time interval 0.76 to
+ 3.45 seconds. In this example, the default metric for time expressions is
+ seconds since no metric is specified in the expressions. This subtitle inherits
+ its font family, font size, foreground color, and text alignment from the
+ region into which it is presented. Since no region is explicitly specified on
+ the paragraph, the nearest ancestor that specifies a region determines the
+ region. Note also that content is presented at the bottom (after edge) of the
+ containing region due to the <code>tts:displayAlign="after"</code> being
+ specified on the region definition.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The notation "[<em>X</em>,<em>Y</em>]" denotes a closed interval from
+ <em>X</em> to <em>Y</em>, including <em>X</em> and <em>Y</em>;
+ "[<em>X</em>,<em>Y</em>)" denotes a right half-open interval from <em>X</em>
+ to <em>Y</em>, including <em>X</em> but not including <em>Y</em>;
+ "(<em>X</em>,<em>Y</em>]" denotes a left half-open interval from <em>X</em>
+ to <em>Y</em>, not including <em>X</em> but including <em>Y</em>;
+ "(<em>X</em>,<em>Y</em>)" denotes an open interval from <em>X</em> to
+ <em>Y</em>, not including <em>X</em> or <em>Y</em>.</p>
+ </div>
+ <table summary="HTML Table" id="dfxp-example-subtitle-1"
+ class="example-images">
+ <caption>
+ Subtitle 1 – Time Interval [0.76, 3.45)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle1.png"
+ alt="Subtitle 1" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The second subtitle continues with the default style, except that it
+ contains two lines of text with an intervening author-specified line break.
+ Note the effects of the use of <code>tts:textAlign="center"</code> to specify
+ the paragraph's alignment in the inline progression direction.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-2"
+ class="example-images">
+ <caption>
+ Subtitle 2 – Time Interval [5.0, 10.0)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle2.png"
+ alt="Subtitle 2" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The third subtitle continues, using a variant style which overrides the
+ default style's foreground color with a different color.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-3"
+ class="example-images">
+ <caption>
+ Subtitle 3 – Time Interval [10.0, 16.0)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle3.png"
+ alt="Subtitle 3" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The fourth subtitle reverts to the default style.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-4"
+ class="example-images">
+ <caption>
+ Subtitle 4 – Time Interval [17.2, 23.0)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle4.png"
+ alt="Subtitle 4" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The fifth subtitle continues, again using a variant style which overrides
+ the default style's foreground color with a different color.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-5"
+ class="example-images">
+ <caption>
+ Subtitle 5 – Time Interval [23.0, 27.0)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle5.png"
+ alt="Subtitle 5" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>During the next active time interval, two distinct subtitles are
+ simultaneously active, with the paragraph expressing each subtitle using a
+ different style that overrides color and paragraph text alignment of the
+ default style. Note that the flow order is determined by the lexical order of
+ elements as they appear in the content hierarchy.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-6"
+ class="example-images">
+ <caption>
+ Subtitles 6a and 6b – Time Interval [28.0, 34.6)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle6.png"
+ alt="Subtitles 6a and 6b" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The next subtitle is specified in a similar manner using a style override to
+ give a paragraph right (end) justified in the inline progression direction.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-7"
+ class="example-images">
+ <caption>
+ Subtitle 7 – Time Interval [34.6, 45.0)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle7.png"
+ alt="Subtitles 7a and 7b" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The eighth subtitle uses the same style override as the previous subtitle in
+ order to maintain the right (end) justification of the paragraph.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-8"
+ class="example-images">
+ <caption>
+ Subtitle 8 – Time Interval [47.3, 49.0)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle8.png"
+ alt="Subtitle 8" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>During the final (ninth) active time interval, two distinct subtitles are
+ again simultaneously active, but with a different style applied to the second
+ paragraph to override the default color. Note that the flow order is determined
+ by the lexical order of elements as they appear in the content hierarchy.</p>
+ <table summary="HTML Table" id="dfxp-example-subtitle-9"
+ class="example-images">
+ <caption>
+ Subtitles 9a and 9b – Time Interval [53.5, 58.7)
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/subtitle9.png"
+ alt="Subtitles 9a and 9b" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The examples shown above demonstrate the primary types of information that
+ may be authored using DFXP: metadata, styling, layout, timing, and content. In
+ typical cases, styling and layout information are separately specified in a
+ document instance. Content information is expressed in a hierarchical fashion
+ that embodies the organization of both spatial (flow) and timing information.
+ Content makes direct or indirect references to styling and layout information
+ and may specify inline overrides to styling.</p>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="definitions" id="definitions"></a>2 Definitions</h2>
+ <div class="div2">
+ <h3><a name="acronyms" id="acronyms"></a>2.1 Acronyms</h3>
+ <table class="acronyms" summary="Glossary List">
+ <tr>
+ <td class="label"><b>DFXP</b></td>
+ <td class="def">
+ <p>Distribution Format Exchange Profile</p>
+ </td>
+ </tr>
+ <tr>
+ <td class="label"><b>TT</b></td>
+ <td class="def">
+ <p>Timed Text</p>
+ </td>
+ </tr>
+ <tr>
+ <td class="label"><b>TT AS</b></td>
+ <td class="def">
+ <p>Timed Text Authoring System</p>
+ </td>
+ </tr>
+ <tr>
+ <td class="label"><b>TT AF</b></td>
+ <td class="def">
+ <p>Timed Text Authoring Format</p>
+ </td>
+ </tr>
+ <tr>
+ <td class="label"><b>TT WG</b></td>
+ <td class="def">
+ <p>Timed Text Working Group</p>
+ </td>
+ </tr>
+ </table>
+ </div>
+ <div class="div2">
+ <h3><a name="terms" id="terms"></a>2.2 Terminology</h3>
+ <dl>
+ <dt class="label">Abstract Document Instance</dt>
+ <dd>
+ <p>An instance of an abstract data set as represented by a <em>Reduced XML
+ Infoset</em>.</p>
+ </dd>
+ <dt class="label">Abstract Document Type</dt>
+ <dd>
+ <p>A set of constraints that defines a class of <em>XML Information
+ Set</em>s <a href="#infoset">[XML InfoSet]</a>.</p>
+ </dd>
+ <dt class="label">Attribute Information Item</dt>
+ <dd>
+ <p>Each specified or defaulted attribute of an XML document corresponds
+ with an attribute information item as defined by <a href="#infoset">[XML
+ InfoSet]</a>, §2.3.</p>
+ </dd>
+ <dt class="label">Character Information Item</dt>
+ <dd>
+ <p>Each data character appearing in an XML document corresponds with a
+ character information item as defined by <a href="#infoset">[XML
+ InfoSet]</a>, §2.6.</p>
+ </dd>
+ <dt class="label">Content Region</dt>
+ <dd>
+ <p>A logical region into which rendered content is placed when modeling or
+ performing presentation processing.</p>
+ </dd>
+ <dt class="label">Element Information Item</dt>
+ <dd>
+ <p>Each element appearing in an XML document corresponds with an element
+ information item as defined by <a href="#infoset">[XML InfoSet]</a>,
+ §2.2.</p>
+ </dd>
+ <dt class="label">Exchange Profile</dt>
+ <dd>
+ <p>A profile (subset) of the TT AF that serves a set of needs for content
+ exchange.</p>
+ </dd>
+ <dt class="label">Region</dt>
+ <dd>
+ <p>A logical construct that models authorial intention regarding desired or
+ potential presentation processing, and which is represented as a
+ rectangular area of a presentation surface into which content is composed
+ and rendered during presentation processing.</p>
+ </dd>
+ <dt class="label">Reduced XML Infoset</dt>
+ <dd>
+ <p>An XML Information Set <a href="#infoset">[XML InfoSet]</a> that
+ satisfieds the constraints specify by <a href="#reduced-infoset"><b>A
+ Reduced XML Infoset</b></a>.</p>
+ </dd>
+ <dt class="label">Root Container Region</dt>
+ <dd>
+ <p>A logical region that establishes a coordinate system into which content
+ regions are placed and optionally clipped.</p>
+ </dd>
+ <dt class="label">Timed Text</dt>
+ <dd>
+ <p>Textual information that is intrinsically or extrinsically associated
+ with timing information.</p>
+ </dd>
+ <dt class="label">Timed Text Authoring Format</dt>
+ <dd>
+ <p>A content type that represents timed text media for the purpose of
+ interchange among authoring systems.</p>
+ </dd>
+ <dt class="label">Timed Text Authoring System</dt>
+ <dd>
+ <p>A content authoring system capable of importing and exporting timed text
+ authoring format content.</p>
+ </dd>
+ </dl>
+ </div>
+ <div class="div2">
+ <h3><a name="conventions" id="conventions"></a>2.3 Documentation
+ Conventions</h3>
+ <p>Within normative prose in this specification, the words <em>may</em>,
+ <em>should</em>, and <em>must</em> are defined as follows:</p>
+ <dl class="conformance-keywords">
+ <dt class="label">may</dt>
+ <dd>
+ <p>Conforming documents and/or TT AF processors are permitted to, but need
+ not behave as described.</p>
+ </dd>
+ <dt class="label">should</dt>
+ <dd>
+ <p>Conforming documents and/or TT AF processors are strongly recommended
+ to, but need not behave as described.</p>
+ </dd>
+ <dt class="label">must</dt>
+ <dd>
+ <p>Conforming documents and/or TT AF processors are required to behave as
+ described; otherwise, they are in error.</p>
+ </dd>
+ </dl>
+ <p>All normative syntactic definitions of XML representations and other related
+ terms are depicted with a light orange background color and labeled as "XML
+ Representation" or "Syntax Representation", such as in the following:</p>
+ <table summary="HTML Table" id="elt-syntax-example" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: example
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<example
+ <span class="reqattr">count</span> = integer
+ size = (<em>large</em>|<em>medium</em>|<em>small</em>) : medium>
+ <em>Content:</em> (all | any*)
+</example>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>In an XML representation, bold-face attribute names (e.g. <span
+ class="strong">count</span> above) indicate a required attribute information
+ item, and the rest are optional. Where an attribute information item has an
+ enumerated type definition, the values are shown separated by vertical bars, as
+ for <code>size</code> above; if there is a default value, it is shown following
+ a colon. Where an attribute information item has a built-in simple type
+ definition defined in <a href="#xsd-2">[XML Schema Part 2]</a>, a hyperlink to
+ its definition therein is given.</p>
+ <p>The allowed content of the information item is shown as a grammar fragment,
+ using the Kleene operators <code>?</code>, <code>*</code> and <code>+</code>.
+ Each element name therein is a hyperlink to its own illustration.</p>
+ <p>All content of this specification that is not explicitly marked as
+ non-normative is considered to be normative. If a section or appendix header
+ contains the the expression "Non-Normative", then the entirety of the section
+ or appendix is considered non-normative.</p>
+ <p>All paragraphs marked as a <span class="strong">Note</span> are considered
+ non-normative.</p>
+ <p>Example code fragments are depicted with a light blue-green background color
+ and labeled as "Example Fragment", such as in the following:</p>
+ <table summary="HTML Table" id="example-fragment-1" class="example">
+ <caption>
+ Example Fragment – Sample
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<tt xml:lang="" xmlns="http://www.w3.org/2006/10/ttaf1">
+ <head>
+ <metadata/>
+ <styling/>
+ <layout/>
+ </head>
+ <body/>
+</tt>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="conformance" id="conformance"></a>3 Conformance</h2>
+ <p>This section specifies the general conformance requirements for TT AF content
+ and processors.</p>
+ <div class="div2">
+ <h3><a name="conformance-content" id="conformance-content"></a>3.1 Content
+ Conformance</h3>
+ <p>A TT AF document instance conforms to this specification if the following
+ criteria are satisfied:</p>
+ <ol type="1">
+ <li>
+ <p>When transporting a document instance in a context in which a MIME Media
+ Type <a href="#mime-media">[MIME]</a> identifies the content type of the
+ interchanged document instance, then the specified media type is
+ <code>application/ttaf+xml</code> in conformance with <a
+ href="#rfc3023">[XML Media Types]</a> § 7, with which an optional
+ <code>profile</code> parameter may appear, the value of which conforms to
+ the values defined by <a href="#vocabulary-profiles"><b>5.2
+ Profiles</b></a>.</p>
+ </li>
+ <li>
+ <p>The document instance is or can be represented as a Reduced XML Infoset
+ as defined by <a href="#reduced-infoset"><b>A Reduced XML
+ Infoset</b></a>.</p>
+ </li>
+ <li>
+ <p>The Reduced XML Infoset that corresponds to the document instance is or
+ can be associated with one of the TT AF Abstract Document Types defined by
+ <a href="#doctypes"><b>4 Document Types</b></a>.</p>
+ </li>
+ <li>
+ <p>The Reduced XML Infoset that corresponds to the document instance is a
+ Valid Abstract Document Instance of the associated Abstract Document
+ Type.</p>
+ </li>
+ <li>
+ <p>The Reduced XML Infoset satisfies all additional mandatory syntactic and
+ semantic constraints defined by this specification. In addition, this
+ Infoset should satisfy the web content accessibility guidelines specified
+ by <a href="#wcag">[WCAG]</a>.</p>
+ </li>
+ </ol>
+ </div>
+ <div class="div2">
+ <h3><a name="conformance-processor" id="conformance-processor"></a>3.2
+ Processor Conformance</h3>
+ <p>A TT AF processor conforms to this specification if the following criteria
+ are satisfied:</p>
+ <ol type="1">
+ <li>
+ <p>The processor provides at least one mechanism for notionally
+ instantiating a Reduced XML Infoset representation of a conformant TT AF
+ document instance.</p>
+ </li>
+ <li>
+ <p>If a process does or can perform validation of a candidate TT AF
+ document instance, then it provides at least one mechanism to implicitly or
+ explicitly associate the Reduced XML Infoset representation of a conformant
+ TT AF document instance with one of the TT AF Abstract Document Types
+ defined by <a href="#doctypes"><b>4 Document Types</b></a>.</p>
+ </li>
+ <li>
+ <p>The processor does not <em>a priori</em> reject or abort the processing
+ of a conformant TT AF document instance.</p>
+ </li>
+ <li>
+ <p>The processor supports all mandatory processing semantics defined by
+ this specification.</p>
+ </li>
+ <li>
+ <p>If the processor claims to support presentation processing in order to
+ produce a rendition of TT AF content on a visual medium, then it must
+ implement the region and line layout semantics defined by <a
+ href="#semantics-region-layout"><b>9.3 Region Layout and
+ Presentation</b></a> and <a href="#semantics-line-layout"><b>9.4 Line
+ Layout</b></a>, respectively. In addition, the processor should satisfy the
+ user agent accessibility guidelines specified by <a
+ href="#uaag">[UAAG]</a>.</p>
+ </li>
+ <li>
+ <p>If the processor supports some optional processing semantics defined by
+ this specification, then it does so in a manner consistent with the defined
+ semantics.</p>
+ </li>
+ </ol>
+ </div>
+ <div class="div2">
+ <h3><a name="claims" id="claims"></a>3.3 Claims</h3>
+ <p>Any claim of compliance with respect to TT AF content or processor
+ conformance must make reference to an implementation compliance statement
+ (ICS).</p>
+ <p>An implementation compliance statement must identify all mandatory and
+ optional features of this specification that are satisfied by the content or
+ processor implementation. In particular, the statement must identify the
+ utilized or supported TT AF vocabulary profile(s) as defined by <a
+ href="#vocabulary-profiles"><b>5.2 Profiles</b></a>, and, if a subset or
+ superset profile is used or supported, then what features are excluded or
+ included in the subset or superset profile.</p>
+ <p>A TT AF document instance for which a compliance claim is made must specify
+ a <code>ttp:profile</code> attribute on its root element as defined by <a
+ href="#parameter-attribute-profile"><b>6.2.7 ttp:profile</b></a>.</p>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="doctypes" id="doctypes"></a>4 Document Types</h2>
+ <p>This section defines the following TT AF Abstract Document Types:</p>
+ <ul>
+ <li>
+ <p><a href="#dfxp-content-doctype"><b>4.1 DFXP Content</b></a></p>
+ </li>
+ </ul>
+ <p>Each abstract document type consists of the following constraints:</p>
+ <ul>
+ <li>
+ <p>a non-empty collection of element types, where each element type consists
+ of a name, a (possibly empty) collection of attributes, and a content
+ specification</p>
+ </li>
+ <li>
+ <p>a non-empty collection of element types that may appear as the document
+ element</p>
+ </li>
+ </ul>
+ <p>An Abstract Document Instance may be assessed in terms of validity, and is
+ considered to be a Valid Abstract Document Instance if it satisfies the following
+ condition: if after</p>
+ <ol type="1">
+ <li>
+ <p>pruning all element information items whose names are not members of the
+ collection of element types defined by the associated abstract document type,
+ then</p>
+ </li>
+ <li>
+ <p>pruning character information item children from any remaining element in
+ case that all character children of the element denote XML whitespace
+ characters and the element's type is defined as empty in the associated
+ Abstract Document Type, and then</p>
+ </li>
+ <li>
+ <p>pruning all attribute information items having expanded names such that
+ the namespace URI of the expanded names are not listed in <a
+ href="#namespace-vocab-table"><b>Table 1 – Namespaces</b></a>,</p>
+ </li>
+ </ol>
+ <p>then the document element is one of the document element types permitted by
+ the associated abstract document type, the descendants of the document element
+ satisfy their respective element type's content specifications, all required
+ attributes are present, and the declared value of each attribute satisfies the
+ type declared by the associated abstract document type.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>While a conformant processor may not <em>a priori</em> reject a conformant
+ document instance, a given document instance may be constrained by the author
+ or authoring tool to satisfy a more restrictive definition of validity.</p>
+ </div>
+ <div class="div2">
+ <h3><a name="dfxp-content-doctype" id="dfxp-content-doctype"></a>4.1 DFXP
+ Content</h3>
+ <p>DFXP Content is an abstract document type of the Timed Text Authoring Format
+ intended to be used for interchange among distribution systems. This document
+ type is defined in terms of the element and attribute vocabulary specified in
+ <a href="#vocabulary"><b>5 Vocabulary</b></a>.</p>
+ <p>This specification defines two types of normative schemas that may be used
+ to validate a subset of conformant DFXP document instances:</p>
+ <ul>
+ <li>
+ <p><a href="#dfxp-schema-rnc"><b>C.1 Relax NG Schema</b></a></p>
+ </li>
+ <li>
+ <p><a href="#dfxp-schema-xsd"><b>C.2 XML Schema Definition (XSD)
+ Schema</b></a></p>
+ </li>
+ </ul>
+ <p>The (root) document element of a DFXP document instance must be a
+ <code>tt</code> element, as defined by <a
+ href="#document-structure-vocabulary-tt"><b>7.1.1 tt</b></a>.</p>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="vocabulary" id="vocabulary"></a>5 Vocabulary</h2>
+ <p>This section defines the namespaces, profiles, and vocabulary (as an element
+ an attribute catalog) of the Timed Text Authoring Format (TT AF) as follows:</p>
+ <ul>
+ <li>
+ <p><a href="#vocabulary-namespaces"><b>5.1 Namespaces</b></a></p>
+ </li>
+ <li>
+ <p><a href="#vocabulary-profiles"><b>5.2 Profiles</b></a></p>
+ </li>
+ <li>
+ <p><a href="#vocabulary-overview"><b>5.3 Catalog</b></a></p>
+ </li>
+ </ul>
+ <div class="div2">
+ <h3><a name="vocabulary-namespaces" id="vocabulary-namespaces"></a>5.1
+ Namespaces</h3>
+ <p>The Timed Text Authoring Format (TT AF) employs a number of namespaces for
+ elements and certain global attributes. The following table specifies this set
+ of namespaces and indicates the default prefix used within this specification
+ and the normative URI that denotes each namespace.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>In a specific document instance, it is not required that the default
+ prefixes shown below are used. Any prefix or namespace binding that satisfies
+ the constraints of XML Namespaces may be used that is associated with the
+ specified namespace URI.</p>
+ </div>
+ <table summary="HTML Table" id="namespace-vocab-table" class="common">
+ <caption>
+ Table 1 – Namespaces
+ </caption>
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <th rowspan="1" colspan="1">Name</th>
+ <th rowspan="1" colspan="1">Prefix</th>
+ <th rowspan="1" colspan="1">Value</th>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">TT</td>
+ <td rowspan="1" colspan="1"><code>tt:</code></td>
+ <td rowspan="1" colspan="1">
+ <code>http://www.w3.org/2006/10/ttaf1</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">TT Parameter</td>
+ <td rowspan="1" colspan="1"><code>ttp:</code></td>
+ <td rowspan="1" colspan="1">
+ <code>http://www.w3.org/2006/10/ttaf1#parameter</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">TT Style</td>
+ <td rowspan="1" colspan="1"><code>tts:</code></td>
+ <td rowspan="1" colspan="1">
+ <code>http://www.w3.org/2006/10/ttaf1#style</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">TT Style Extensions</td>
+ <td rowspan="1" colspan="1"><code>ttsx:</code></td>
+ <td rowspan="1" colspan="1">
+ <code>http://www.w3.org/2006/10/ttaf1#style-extension</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">TT Metadata</td>
+ <td rowspan="1" colspan="1"><code>ttm:</code></td>
+ <td rowspan="1" colspan="1">
+ <code>http://www.w3.org/2006/10/ttaf1#metadata</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">TT Metadata Extensions</td>
+ <td rowspan="1" colspan="1"><code>ttmx:</code></td>
+ <td rowspan="1" colspan="1">
+ <code>http://www.w3.org/2006/10/ttaf1#metadata-extension</code></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>If a reference to an element type is used in this specification and the
+ name of the element type is not namespace qualified, then the TT Namespace
+ applies.</p>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="vocabulary-profiles" id="vocabulary-profiles"></a>5.2
+ Profiles</h3>
+ <p>The Timed Text Authoring Format (TT AF) employs a number of profiles of its
+ vocabulary and associated semantics. The following table specifies this set of
+ profiles and indicates a normative name for each profile.</p>
+ <table summary="HTML Table" id="profile-vocab-table" class="common">
+ <caption>
+ Table 2 – Profiles
+ </caption>
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <th rowspan="1" colspan="1">Name</th>
+ <th rowspan="1" colspan="1">Value</th>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">DFXP</td>
+ <td rowspan="1" colspan="1">
+ <code>http://www.w3.org/2006/10/ttaf1#profile-dfxp</code></td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <p>A convention is defined for use by content authors to indicate use of a
+ subtractive or additive delta to a predefined profile by using an optional
+ <em>sub-profile</em> suffix of a profile URI: if a sub-profile is subtractive
+ (results in a proper subset), then the <em>sub-profile</em> is expressed as
+ "-token"; if additive (results in a proper superset), then it is expressed as
+ "+token", where <em>token</em> expresses an author determined sub-profile that
+ adheres to the <code>xsd:NCName</code> data type defined in <a
+ href="#xsd-2">[XML Schema Part 2]</a>, §3.3.7.</p>
+ <p>All tokens used in a sub-profile suffix that do not start with the prefix
+ <code>x-</code> are reserved for future standardization.</p>
+ <p>The profile of a document instance is specified using a
+ <code>ttp:profile</code> attribute as defined by <a
+ href="#parameter-attribute-profile"><b>6.2.7 ttp:profile</b></a>.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>A TT AF authoring system may indicate the profile of TT AF used in a
+ document instance by specifying a <code>ttp:profile</code> attribute. A TT AF
+ content processor may make use of this profile value to associate a document
+ instance with a schema or processing functions.</p>
+ </div>
+ <p>An example of an author defined "tiny" subtractive sub-profile of DFXP is
+ shown below in <a href="#dfxp-example-sub-profile"><b>Example Fragment – DFXP
+ Subtractive Profile</b></a>.</p>
+ <table summary="HTML Table" id="dfxp-example-sub-profile" class="example">
+ <caption>
+ Example Fragment – DFXP Subtractive Profile
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<tt
+ ttp:profile="http://www.w3.org/2006/10/ttaf1#profile-dfxp-x-tiny"
+ xml:lang=""
+ xmlns="http://www.w3.org/2006/10/ttaf1"
+ xmlns:ttp="http://www.w3.org/2006/10/ttaf1#parameter">
+ ...
+</tt>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Because the above example is an author defined sub-profile (as opposed to
+ a future W3C defined profile), the sub-profile token contains the prefix
+ <code>x-</code>.</p>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="vocabulary-overview" id="vocabulary-overview"></a>5.3 Catalog</h3>
+ <p>The vocabulary of the Timed Text Authoring Format (TT AF) is defined in the
+ following major catalogs (divisions of vocabulary):</p>
+ <ul>
+ <li>
+ <p><a href="#core-vocabulary-overview"><b>5.3.1 Core Catalog</b></a></p>
+ </li>
+ <li>
+ <p><a href="#extension-vocabulary-overview"><b>5.3.2 Extension
+ Catalog</b></a></p>
+ </li>
+ </ul>
+ <p>The core catalog defines the baseline, core vocabulary of the TT AF, and, in
+ particular, the vocabulary of DFXP. The extensions catalog serves as a
+ placeholder for extensions to the core vocabulary defined by DFXP.</p>
+ <div class="div3">
+ <h4><a name="core-vocabulary-overview"
+ id="core-vocabulary-overview"></a>5.3.1 Core Catalog</h4>
+ <p>The core vocabulary catalog is intended to satisfy the needs of DFXP while
+ providing a baseline vocabulary for future profiles. This vocabulary is
+ divided into distinct categories, specified in detail in the following
+ sections:</p>
+ <ul>
+ <li>
+ <p><a href="#parameters"><b>6 Parameters</b></a></p>
+ </li>
+ <li>
+ <p><a href="#content"><b>7 Content</b></a></p>
+ </li>
+ <li>
+ <p><a href="#styling"><b>8 Styling</b></a></p>
+ </li>
+ <li>
+ <p><a href="#layout"><b>9 Layout</b></a></p>
+ </li>
+ <li>
+ <p><a href="#timing"><b>10 Timing</b></a></p>
+ </li>
+ <li>
+ <p><a href="#animation"><b>11 Animation</b></a></p>
+ </li>
+ <li>
+ <p><a href="#metadata"><b>12 Metadata</b></a></p>
+ </li>
+ </ul>
+ <p>The core element vocabulary specified for use with a TT AF document
+ instance is enumerated in <a href="#element-vocab-table"><b>Table 3 – Element
+ Vocabulary</b></a>.</p>
+ <table summary="HTML Table" id="element-vocab-table" class="common">
+ <caption>
+ Table 3 – Element Vocabulary
+ </caption>
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <th rowspan="1" colspan="1">Module</th>
+ <th rowspan="1" colspan="1">Elements</th>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Animation</td>
+ <td rowspan="1" colspan="1"><a
+ href="#animation-vocabulary-set">set</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Content</td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-body">body</a>, <a
+ href="#content-vocabulary-div">div</a>, <a
+ href="#content-vocabulary-p">p</a>, <a
+ href="#content-vocabulary-span">span</a>, <a
+ href="#content-vocabulary-br">br</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Document</td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-tt">tt</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Head</td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-head">head</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Layout</td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-layout">layout</a>, <a
+ href="#layout-vocabulary-region">region</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Metadata</td>
+ <td rowspan="1" colspan="1"><a
+ href="#metadata-vocabulary-metadata">metadata</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Metadata Items</td>
+ <td rowspan="1" colspan="1"><a
+ href="#metadata-vocabulary-actor">ttm:actor</a>, <a
+ href="#metadata-vocabulary-agent">ttm:agent</a>, <a
+ href="#metadata-vocabulary-copyright">ttm:copyright</a>, <a
+ href="#metadata-vocabulary-desc">ttm:desc</a>, <a
+ href="#metadata-vocabulary-name">ttm:name</a>, <a
+ href="#metadata-vocabulary-title">ttm:title</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Styling</td>
+ <td rowspan="1" colspan="1"><a
+ href="#styling-vocabulary-styling">styling</a>, <a
+ href="#styling-vocabulary-style">style</a></td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <p>Element vocabulary groups that are used in defining content models for TT
+ AF element types are enumerated in <a
+ href="#element-vocab-group-table"><b>Table 4 – Element Vocabulary
+ Groups</b></a>.</p>
+ <table summary="HTML Table" id="element-vocab-group-table" class="common">
+ <caption>
+ Table 4 – Element Vocabulary Groups
+ </caption>
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <th rowspan="1" colspan="1">Group</th>
+ <th rowspan="1" colspan="1">Elements</th>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Animation.class</td>
+ <td rowspan="1" colspan="1"><a
+ href="#animation-vocabulary-set">set</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Block.class</td>
+ <td rowspan="1" colspan="1"><a href="#content-vocabulary-div">div</a> |
+ <a href="#content-vocabulary-p">p</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Inline.class</td>
+ <td rowspan="1" colspan="1"><a href="#content-vocabulary-span">span</a>
+ | <a href="#content-vocabulary-span">br</a> | <code>#PCDATA</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Metadata.class</td>
+ <td rowspan="1" colspan="1"><a
+ href="#metadata-vocabulary-metadata">metadata</a> | <a
+ href="#metadata-vocabulary-copyright">ttm:agent</a> | <a
+ href="#metadata-vocabulary-copyright">ttm:copyright</a> | <a
+ href="#metadata-vocabulary-desc">ttm:desc</a> | <a
+ href="#metadata-vocabulary-title">ttm:title</a></td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <p>The attribute vocabulary specified for use with the core vocabulary
+ catalog is enumerated in <a href="#attribute-vocab-table"><b>Table 5 –
+ Attribute Vocabulary</b></a>.</p>
+ <table summary="HTML Table" id="attribute-vocab-table" class="common">
+ <caption>
+ Table 5 – Attribute Vocabulary
+ </caption>
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <th rowspan="1" colspan="1">Module</th>
+ <th rowspan="1" colspan="1">Attributes</th>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Core Attributes</td>
+ <td rowspan="1" colspan="1"><a href="#content-attribute-id">xml:id</a>,
+ <a href="#content-attribute-lang">xml:lang</a>, <a
+ href="#content-attribute-space">xml:space</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Layout</td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-attribute-region">region</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Metadata Attributes</td>
+ <td rowspan="1" colspan="1"><a
+ href="#metadata-attribute-agent">ttm:agent</a>, <a
+ href="#metadata-attribute-role">ttm:role</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Parameter Attributes</td>
+ <td rowspan="1" colspan="1"><a
+ href="#parameter-attribute-cellResolution">ttp:cellResolution</a>, <a
+ href="#parameter-attribute-clockMode">ttp:clockMode</a>, <a
+ href="#parameter-attribute-frameRate">ttp:frameRate</a>, <a
+ href="#parameter-attribute-frameRateMultiplier">ttp:frameRateMultipler</a>,
+ <a href="#parameter-attribute-markerMode">ttp:markerMode</a>, <a
+ href="#parameter-attribute-pixelAspectRatio">ttp:pixelAspectRatio</a>,
+ <a href="#parameter-attribute-profile">ttp:profile</a>, <a
+ href="#parameter-attribute-smpteMode">ttp:smpteMode</a>, <a
+ href="#parameter-attribute-subFrameRate">ttp:subFrameRate</a>, <a
+ href="#parameter-attribute-tickRate">ttp:tickRate</a>, <a
+ href="#parameter-attribute-timeBase">ttp:timeBase</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Styling</td>
+ <td rowspan="1" colspan="1"><a
+ href="#style-attribute-style">style</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Styling Attributes</td>
+ <td rowspan="1" colspan="1"><a
+ href="#style-attribute-backgroundColor">tts:backgroundColor</a>, <a
+ href="#style-attribute-color">tts:color</a>, <a
+ href="#style-attribute-direction">tts:direction</a>, <a
+ href="#style-attribute-display">tts:display</a>, <a
+ href="#style-attribute-displayAlign">tts:displayAlign</a>, <a
+ href="#style-attribute-dynamicFlow">tts:dynamicFlow</a>, <a
+ href="#style-attribute-extent">tts:extent</a>, <a
+ href="#style-attribute-fontFamily">tts:fontFamily</a>, <a
+ href="#style-attribute-fontSize">tts:fontSize</a>, <a
+ href="#style-attribute-fontStyle">tts:fontStyle</a>, <a
+ href="#style-attribute-fontWeight">tts:fontWeight</a>, <a
+ href="#style-attribute-lineHeight">tts:lineHeight</a>, <a
+ href="#style-attribute-opacity">tts:opacity</a>, <a
+ href="#style-attribute-origin">tts:origin</a>, <a
+ href="#style-attribute-overflow">tts:overflow</a>, <a
+ href="#style-attribute-padding">tts:padding</a>, <a
+ href="#style-attribute-showBackground">tts:showBackground</a>, <a
+ href="#style-attribute-textAlign">tts:textAlign</a>, <a
+ href="#style-attribute-textDecoration">tts:textDecoration</a>, <a
+ href="#style-attribute-textOutline">tts:textOutline</a>, <a
+ href="#style-attribute-unicodeBidi">tts:unicodeBidi</a>, <a
+ href="#style-attribute-visibility">tts:visibility</a>, <a
+ href="#style-attribute-wrapOption">tts:wrapOption</a>, <a
+ href="#style-attribute-writingMode">tts:writingMode</a>, <a
+ href="#style-attribute-zIndex">tts:zIndex</a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1">Timing Attributes</td>
+ <td rowspan="1" colspan="1"><a
+ href="#timing-attribute-begin">begin</a>, <a
+ href="#timing-attribute-dur">dur</a>, <a
+ href="#timing-attribute-end">end</a>, <a
+ href="#timing-attribute-timeContainer">timeContainer</a></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>All vocabulary defined by the TT AF consistently makes use of the
+ so-called <em>lowerCamelCase</em> naming convention. In some cases, this
+ results in the change of a name when the name was based upon another
+ specification that used a different naming convention.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="extension-vocabulary-overview"
+ id="extension-vocabulary-overview"></a>5.3.2 Extension Catalog</h4>
+ <p>The extension vocabulary catalog is intended for use by future profiles of
+ the TT AF.</p>
+ <p>In this version of this specification, no standardized extension
+ vocabulary is defined. Two namespaces are specifically reserved by <a
+ href="#namespace-vocab-table"><b>Table 1 – Namespaces</b></a> for metadata
+ and style extension vocabulary:</p>
+ <ul>
+ <li>
+ <p>TT Style Extensions</p>
+ </li>
+ <li>
+ <p>TT Metadata Extensions</p>
+ </li>
+ </ul>
+ <p>In addition to standardized extension vocabulary, a conforming TT AF
+ document instance may contain arbitrary namespace qualified elements that
+ reside in any namespace other than those namespaces defined for use with this
+ specification. Furthermore, a conforming TT AF document instance may contain
+ arbitrary namespace qualified attributes on TT AF defined vocabulary where
+ such attributes reside in any namespace other than those defined for use with
+ this specification.</p>
+ </div>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="parameters" id="parameters"></a>6 Parameters</h2>
+ <p>This section specifies the <em>parameters</em> matter of the core vocabulary
+ catalog, where parameters are to be understood as information that is either (1)
+ essential or (2) of significant importance for the purpose of interpreting the
+ semantics of other types of information expressed by core vocabulary items or for
+ establishing a processing context by means of which TT AF content can be related
+ to an external environment.</p>
+ <div class="div2">
+ <h3><a name="parameters-element-vocabulary"
+ id="parameters-element-vocabulary"></a>6.1 Element Vocabulary</h3>
+ <p>No parameters related element vocabulary is defined for use in the core
+ vocabulary catalog.</p>
+ </div>
+ <div class="div2">
+ <h3><a name="parameters-attribute-vocabulary"
+ id="parameters-attribute-vocabulary"></a>6.2 Attribute Vocabulary</h3>
+ <p>The following attributes are defined in the TT Parameter Namespace.</p>
+ <ul>
+ <li>
+ <p><a href="#parameter-attribute-cellResolution"><b>6.2.1
+ ttp:cellResolution</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-clockMode"><b>6.2.2
+ ttp:clockMode</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-frameRate"><b>6.2.3
+ ttp:frameRate</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-frameRateMultiplier"><b>6.2.4
+ ttp:frameRateMultiplier</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-markerMode"><b>6.2.5
+ ttp:markerMode</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-pixelAspectRatio"><b>6.2.6
+ ttp:pixelAspectRatio</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-profile"><b>6.2.7 ttp:profile</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-smpteMode"><b>6.2.8
+ ttp:smpteMode</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-subFrameRate"><b>6.2.9
+ ttp:subFrameRate</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-tickRate"><b>6.2.10
+ ttp:tickRate</b></a></p>
+ </li>
+ <li>
+ <p><a href="#parameter-attribute-timeBase"><b>6.2.11
+ ttp:timeBase</b></a></p>
+ </li>
+ </ul>
+ <p>Unless explicitly stated otherwise, linear white-space (LWSP) may appear
+ between tokens of a value of a TT Parameter.</p>
+ <div class="div3">
+ <h4><a name="parameter-attribute-cellResolution"
+ id="parameter-attribute-cellResolution"></a>6.2.1 ttp:cellResolution</h4>
+ <p>The <code>ttp:cellResolution</code> attribute may be used by an author to
+ express the number of horizontal and vertical cells into which the root
+ container region area is divided for the purpose of expressing presentation
+ semantics in terms of a uniform grid.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-cellResolution-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:cellResolution
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:cellResolution
+ : columns rows // <em>columns</em> != 0; <em>rows</em> != 0
+columns | rows
+ : <a href="#style-value-digit"><digit></a>+
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If not specified, the number of columns and rows must be considered to be
+ 32 and 15, respectively. If specified, then columns or rows must not be zero
+ (0).</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The choice of values 32 and 15 are based on this being the maximum
+ number of columns and rows defined by <a
+ href="#cea608c">[CEA-608-C]</a>.</p>
+ </div>
+ <p>A <code>ttp:cellResolution</code> attribute is considered to be
+ significant only when specified on the <code>tt</code> element.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The use of a uniform grid is employed only for the purpose of measuring
+ lengths and expressing coordinates. In particular, it is not assumed that
+ the presentation of text or the alignment of individual glyph areas is
+ coordinated with this grid. Such alignment is possible, but requires the
+ use of a monospaced font and a font size whose EM square exactly matches
+ the cell size.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-clockMode"
+ id="parameter-attribute-clockMode"></a>6.2.2 ttp:clockMode</h4>
+ <p>The <code>ttp:clockMode</code> attribute is used to specify the
+ interpretation of time expressions as real-time time coordinates when
+ operating with time base of <code>clock</code> as defined by <a
+ href="#parameter-attribute-timeBase"><b>6.2.11 ttp:timeBase</b></a>.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>See <a href="#timing-time-value-expressions"><b>10.3 Time Value
+ Expressions</b></a> for the specification of time expression syntax.</p>
+ </div>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-clockMode-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:clockMode
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:clockMode
+ : "local"
+ | "gps"
+ | "utc"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the time base, defined by <a
+ href="#parameter-attribute-timeBase"><b>6.2.11 ttp:timeBase</b></a>, is
+ designated as <code>clock</code>, then this parameter applies as follows: if
+ the parameter's value is <code>local</code>, then time expressions are
+ interpreted as local wall-clock time coordinates; if <code>utc</code>, then
+ time expressions are interpreted as UTC time coordinates <a
+ href="#utc">[UTC]</a>; if <code>gps</code>, then time expressions are
+ interpreted as GPS time coordinates <a href="#gps">[GPS]</a>.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The primary difference between GPS time and UTC time is that GPS time is
+ not adjusted for leap seconds, while UTC time is adjusted as follows: UTC =
+ TAI (<em>Temp Atomique International</em>) + <em>leap seconds accumulated
+ since 1972</em>. TAI is maintained by the <em>Bureau International des
+ Poids et Mesures</em> (BIPM) in Sevres, France. The GPS system time is
+ steered to a Master Clock (MC) at the US Naval Observatory which is kept
+ within a close but unspecified tolerance of TAI.</p>
+ </div>
+ <p>If not specified, the value of this parameter must be considered to be
+ <code>utc</code>.</p>
+ <p>A <code>ttp:clockMode</code> attribute is considered to be significant
+ only when specified on the <code>tt</code> element.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-frameRate"
+ id="parameter-attribute-frameRate"></a>6.2.3 ttp:frameRate</h4>
+ <p>The <code>ttp:frameRate</code> attribute is used to specify the frame rate
+ of a related media object or the intrinsic frame rate of a document instance
+ in case it is intended to function as an independent media object.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-frameRate-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:frameRate
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:frameRate
+ : <a
+href="#style-value-digit"><digit></a>+ // <em>value</em> > 0
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The frame rate that applies to a document instance is used to interpret
+ time expressions that are expressed in <em>frames</em> as defined by <a
+ href="#timing-value-timeExpression"><b>10.3.1
+ <timeExpression></b></a>.</p>
+ <p>A frame is interpreted as a division of a second of media time, such that
+ if the frame rate is specified as <em>F</em>, then a second of media time is
+ divided into <em>F</em> intervals of equal duration, where each interval is
+ labeled as frame <em>f</em>, with <em>f</em> ∈ [0…<em>F−1</em>].</p>
+ <p>If not specified, the frame rate must be considered to be equal to some
+ application defined frame rate, or if no application defined frame rate
+ applies, then thirty (30) frames per second. If specified, then the frame
+ rate must be greater than zero (0).</p>
+ <p>A <code>ttp:frameRate</code> attribute is considered to be significant
+ only when specified on the <code>tt</code> element.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-frameRateMultiplier"
+ id="parameter-attribute-frameRateMultiplier"></a>6.2.4
+ ttp:frameRateMultiplier</h4>
+ <p>The <code>ttp:frameRateMultiplier</code> attribute is used to specify a
+ multiplier to be applied to the frame rate specified by a
+ <code>ttp:frameRate</code> attribute in order to compute the effective frame
+ rate.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table"
+ id="parameter-attribute-frameRateMultiplier-syntax" class="syntax">
+ <caption>
+ Syntax Representation – ttp:frameRateMultiplier
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:frameRateMultiplier
+ : numerator ( ":" denominator )? // <em>denominator</em> != 0
+numerator | denominator
+ : <a href="#style-value-digit"><digit></a>+
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>A frame rate multiplier is used when the desired frame rate cannot be
+ expressed as an integral number of frames per second.</p>
+ <p>If not specified, the frame rate multiplier must be considered to be equal
+ to one (1:1). If a denominator is specified, then it must not be zero
+ (0).</p>
+ <p>A <code>ttp:frameRateMultiplier</code> attribute is considered to be
+ significant only when specified on the <code>tt</code> element.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The frame rate multiplier used for synchronizing with NTSC <a
+ href="#smpte170m">[SMPTE 170M]</a> formatted video objects at 30 frames per
+ second is nominally 1000:1001. The nominal frame rate of NTSC video is
+ defined as the chrominance sub-carrier frequency of 3,579,545.45…Hz (=
+ 5.0MHz × 63/88) times the ratio 2/455 divided by the number of horizontal
+ lines per frame of 525, which yields a frame rate of 29.970029970029… (= 30
+ × 1000/1001) frames per second. Other frame rate multipliers apply to
+ different regions of usage and video format standards.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Except in the case of PAL/M, the frame rate multiplier used for
+ synchronizing with PAL formatted video objects at 25 frames per second is
+ nominally 1:1.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-markerMode"
+ id="parameter-attribute-markerMode"></a>6.2.5 ttp:markerMode</h4>
+ <p>The <code>ttp:markerMode</code> attribute is used to specify constraints
+ on the interpretation and use of time expressions that correspond with <a
+ href="#smpte12m">[SMPTE 12M]</a> time coordinates when operating with time
+ base of <code>smpte</code> as defined by <a
+ href="#parameter-attribute-timeBase"><b>6.2.11 ttp:timeBase</b></a>.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-markerMode-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:markerMode
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:markerMode
+ : "continuous"
+ | "discontinuous"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the time base, defined by <a
+ href="#parameter-attribute-timeBase"><b>6.2.11 ttp:timeBase</b></a>, is
+ designated as <code>smpte</code>, then this parameter applies as follows: if
+ the parameter's value is <code>continuous</code>, then <a
+ href="#smpte12m">[SMPTE 12M]</a> time coordinates may be assumed to be linear
+ and either monotonically increasing or decreasing; however, if
+ <code>discontinuous</code>, then any assumption must not be made regarding
+ linearity or monotonicity of time coordinates.</p>
+ <p>If not specified, the value of this parameter must be considered to be
+ <code>continuous</code>.</p>
+ <p>A <code>ttp:markerMode</code> attribute is considered to be significant
+ only when specified on the <code>tt</code> element.</p>
+ <p>If a value of <code>discontinuous</code> applies, then time expressions
+ must not be converted to either media time or real time coordinates,
+ arithmetical operators (addition, multiplication) are not defined on time
+ expressions, and, consequently, any expression of a duration must be
+ ignored.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>When operating with <code>smpte</code> time base and
+ <code>discontinuous</code> marker mode, there is no effective time
+ coordinate space; rather, all time expressions are interpreted as labeled
+ synchronization events (markers), where some external synchronization
+ context emits these events, which, when they correspond with time
+ expressions that denote the same label, cause a temporal interval to begin
+ or end accordingly.</p>
+ <p>An additional side-effect of operating in <code>discontinuous</code>
+ mode is that time expressions of children have no necessary relationship
+ with time expressions of their temporal container; that is, temporal
+ containers and children of these containers are temporally activated and
+ inactivated independently based on the occurrence of a labeled
+ synchronization (marker) event.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The notion of marker discontinuity as captured by this parameter is
+ logically independent from the method used to count frames as expressed by
+ the <code>ttp:smpteMode</code> parameter. In particular, even if the
+ <code>ttp:smpteMode</code> parameter is specified as <code>dropNTSC</code>
+ or <code>dropPAL</code>, the marker mode may be specified as
+ <code>continuous</code>, even in the presence of frame count
+ discontinuities induced by the frame counting method, unless there were
+ some other non-linearity or discontinuity in marker labeling, for example,
+ two consecutive frames labeled as <code>10:00:00:00</code> and
+ <code>10:00:01:00</code>.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-pixelAspectRatio"
+ id="parameter-attribute-pixelAspectRatio"></a>6.2.6 ttp:pixelAspectRatio</h4>
+ <p>The <code>ttp:pixelAspectRatio</code> attribute may be used by a content
+ author to express the aspect ratio of non-square pixels in the production of
+ content that makes use of pixel coordinates.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-pixelAspectRatio-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:pixelAspectRatio
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:pixelAspectRatio
+ : width ":" height // <em>width</em> != 0; <em>height</em> != 0
+width | height
+ : <a href="#style-value-digit"><digit></a>+
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If not specified, then square pixels (i.e., aspect ratio 1:1) must be
+ assumed to apply. If specified, then width or height must not be zero.</p>
+ <p>A <code>ttp:pixelAspectRatio</code> attribute is considered to be
+ significant only when specified on the <code>tt</code> element.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>This parameter may be used by a content transcoder or translator in
+ order to convert pixel measurements between different pixel aspect ratios
+ while still maintaining authorial layout intentions.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-profile"
+ id="parameter-attribute-profile"></a>6.2.7 ttp:profile</h4>
+ <p>The <code>ttp:profile</code> attribute may be used by a content author to
+ express the profile of the Timed Text Authoring Format (TT AF) used in a
+ document instance.</p>
+ <p>If specified, the value of this attribute must adhere to the
+ <code>xsd:anyURI</code> data type defined by <a href="#xsd-2">[XML Schema
+ Part 2]</a>, §3.2.17, and, further, must specify a profile URI as defined by
+ <a href="#vocabulary-profiles"><b>5.2 Profiles</b></a>.</p>
+ <p>If not specified, then the Distribution Format Exchange Profile (DFXP)
+ must be assumed to apply.</p>
+ <p>A <code>ttp:profile</code> attribute is considered to be significant only
+ when specified on the <code>tt</code> element.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-smpteMode"
+ id="parameter-attribute-smpteMode"></a>6.2.8 ttp:smpteMode</h4>
+ <p>The <code>ttp:smpteMode</code> attribute is used to specify constraints on
+ the interpretation and use of frame counts that correspond with <a
+ href="#smpte12m">[SMPTE 12M]</a> time coordinates when operating with time
+ base of <code>smpte</code> as defined by <a
+ href="#parameter-attribute-timeBase"><b>6.2.11 ttp:timeBase</b></a>.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-smpteMode-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:smpteMode
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:smpteMode
+ : "dropNTSC"
+ | "dropPAL"
+ | "nonDrop"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the time base, defined by <a
+ href="#parameter-attribute-timeBase"><b>6.2.11 ttp:timeBase</b></a>, is
+ designated as <code>smpte</code>, then this parameter applies as follows: if
+ the parameter's value is <code>nonDrop</code>, then, within any given second
+ of a time expression, frames count from 0 to <em>N−1</em>, where <em>N</em>
+ is the value specified by the <code>ttp:frameRate</code> parameter, but while
+ ignoring any value specified by the <code>ttp:frameRateMultiplier</code>
+ parameter.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>When operating in <code>nonDrop</code> mode, a second of a time
+ expression may or may not be equal to a second of real time during normal
+ (1x speed) forward playback. If the <code>ttp:frameRateMultiplier</code>
+ parameter is specified and is not equal to 1:1, then a second of a time
+ expression will either be shorter or longer than a second of elapsed play
+ in real time.</p>
+ </div>
+ <p>If this parameter's value is <code>dropNTSC</code>, then, within any given
+ second of a time expression except the second <code>00</code>, frames count
+ from 0 to <em>N−1</em>, where <em>N</em> is the value specified by the
+ <code>ttp:frameRate</code> parameter, but while ignoring any value specified
+ by the <code>ttp:frameRateMultiplier</code> parameter. If the second of a
+ time expression is <code>00</code> and the minute of the time expression is
+ not <code>00</code>, <code>10</code>, <code>20</code>, <code>30</code>,
+ <code>40</code>, or <code>50</code>, then frame codes <code>00</code> and
+ <code>01</code> are dropped during that second; otherwise, these frame codes
+ are not dropped.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For example, when operating in <code>dropNTSC</code> mode with
+ <code>ttp:frameRate</code> of <code>30</code>, a discontinuity in frame
+ count occurs between consecutive frames as shown in the following sequence
+ of time expressions: <code>01:08:59:28</code>, <code>01:08:59:29</code>,
+ <code>01:09:00:02</code>, <code>01:09:00:03</code>.</p>
+ </div>
+ <p>If this parameter's value is <code>dropPAL</code>, then, within any given
+ second of a time expression except the second <code>00</code>, frames count
+ from 0 to <em>N−1</em>, where <em>N</em> is the value specified by the
+ <code>ttp:frameRate</code> parameter, but while ignoring any value specified
+ by the <code>ttp:frameRateMultiplier</code> parameter. If the second of a
+ time expression is <code>00</code> and the minute of the time expression is
+ even but not <code>00</code>, <code>20</code>, or <code>40</code>, then frame
+ codes <code>00</code> through <code>03</code> are dropped during that second;
+ otherwise, these frame codes are not dropped.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For example, when operating in <code>dropPAL</code> mode with
+ <code>ttp:frameRate</code> of <code>30</code>, a discontinuity in frame
+ count occurs between consecutive frames as shown in the following sequence
+ of time expressions: <code>01:09:59:28</code>, <code>01:09:59:29</code>,
+ <code>01:10:00:04</code>, <code>01:10:00:04</code>.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The <code>dropPAL</code> mode is also known as the <em>M/PAL</em> or
+ <em>PAL (M)</em> drop-frame code, which uses PAL modulation with the NTSC
+ frame rate of ~29.97 frames/second. The M/PAL system is used primarily in
+ Brazil.</p>
+ </div>
+ <p>If not specified, then <code>nonDrop</code> must be assumed to apply.</p>
+ <p>A <code>ttp:smpteMode</code> attribute is considered to be significant
+ only when specified on the <code>tt</code> element.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-subFrameRate"
+ id="parameter-attribute-subFrameRate"></a>6.2.9 ttp:subFrameRate</h4>
+ <p>The <code>ttp:subFrameRate</code> attribute is used to specify the
+ sub-frame rate of a related media object or the intrinsic sub-frame rate of a
+ document instance in case it is intended to function as an independent media
+ object.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-subFrameRate-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:subFrameRate
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:subFrameRate
+ : <a
+href="#style-value-digit"><digit></a>+ // <em>value</em> > 0
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The sub-frame rate that applies to a document instance is used to
+ interpret time expressions that are expressed in <em>sub-frames</em> as
+ defined by <a href="#timing-value-timeExpression"><b>10.3.1
+ <timeExpression></b></a>.</p>
+ <p>A sub-frame is interpreted as a division of a frame of media time, such
+ that if the sub-frame rate is specified as <em>S</em>, then a frame of media
+ time is divided into <em>S</em> intervals of equal duration, where each
+ interval is labeled as sub-frame <em>s</em>, with <em>s</em> ∈
+ [0…<em>S−1</em>].</p>
+ <p>If not specified, the sub-frame rate must be considered to be equal to one
+ (1). If specified, then the sub-frame rate must be greater than zero (0).</p>
+ <p>A <code>ttp:subFrameRate</code> attribute is considered to be significant
+ only when specified on the <code>tt</code> element.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The sub-frame is sometimes referred to as a <em>field</em> in the
+ context of synchronization with an interlaced video media object.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-tickRate"
+ id="parameter-attribute-tickRate"></a>6.2.10 ttp:tickRate</h4>
+ <p>The <code>ttp:tickRate</code> attribute is used to specify the tick rate
+ of a related media object or the intrinsic tick rate of content of a document
+ instance in case it is intended to function as an independent media
+ object.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-tickRate-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:tickRate
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:tickRate
+ : <a
+href="#style-value-digit"><digit></a>+ // <em>value</em> > 0
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The tick rate that applies to a document instance is used to interpret
+ time expressions that are expressed in <em>ticks</em> by using the
+ <code>t</code> metric as defined by <a
+ href="#timing-value-timeExpression"><b>10.3.1
+ <timeExpression></b></a>.</p>
+ <p>A tick is interpreted as an integral division of a second of media time,
+ such that if the tick rate is specified as <em>T</em>, then a second of media
+ time is divided into <em>T</em> intervals of equal duration, where each
+ interval is labeled as tick <em>t</em>, with <em>t</em> ∈
+ [0…<em>T−1</em>].</p>
+ <p>If not specified, then if a frame rate is specified, the tick rate must be
+ considered to be the effective frame rate multiplied by the sub-frame rate
+ (i.e., ticks are interpreted as sub-frames); or, if no frame rate is
+ specified, the tick rate must be considered to be one (1) tick per second of
+ media time. If specified, then the tick rate must not be zero (0).</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>There is no predefined relationship between ticks and frames or
+ sub-frames. Ticks are an arbitrary division of seconds that permit use of
+ fixed point arithmetic rather than fractional (and potentially inexact)
+ expressions of seconds.</p>
+ </div>
+ <p>A <code>ttp:tickRate</code> attribute is considered to be significant only
+ when specified on the <code>tt</code> element.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="parameter-attribute-timeBase"
+ id="parameter-attribute-timeBase"></a>6.2.11 ttp:timeBase</h4>
+ <p>The <code>ttp:timeBase</code> attribute is used to specify the temporal
+ coordinate system by means of which time expressions are interpreted in a
+ document instance.</p>
+ <p>If specified, the value of this attribute must adhere to the following
+ syntax:</p>
+ <table summary="HTML Table" id="parameter-attribute-timeBase-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – ttp:timeBase
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+ttp:timeBase
+ : "media"
+ | "smpte"
+ | "clock"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the time base is designated as <code>media</code>, then a time
+ expression denotes a coordinate in some media object's time line, where the
+ media object may be an external media object with which the content of a
+ document instance is to be synchronized, or it may be the content of a
+ document instance itself in a case where the timed text content is intended
+ to establish an independent time line.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>When using a media time base, if that time base is paused or scaled
+ positively or negatively, then it is expected that the presentation of
+ associated Timed Text content will be similarly paused, accelerated, or
+ decelerated, respectively. The means for controlling an external media time
+ base is outside the scope of this specification.</p>
+ </div>
+ <p>If the time base is designated as <code>smpte</code>, then a time
+ expression denotes a <a href="#smpte12m">[SMPTE 12M]</a> time coordinate with
+ which the content of a document instance is to be synchronized. In this case,
+ the value of the <code>ttp:markerMode</code> and <code>ttp:smpteMode</code>
+ parameters apply, as defined by <a
+ href="#parameter-attribute-markerMode"><b>6.2.5 ttp:markerMode</b></a> and <a
+ href="#parameter-attribute-smpteMode"><b>6.2.8 ttp:smpteMode</b></a>,
+ respectively</p>
+ <p>If the time base is designated as <code>clock</code>, then the time
+ expression denotes a coordinate in some real-world time line as established
+ by some real-time clock, such as the local wall-clock time or UTC
+ (Coordinated Universal Time) or GPS (Global Positioning System) time
+ lines.</p>
+ <p>If not specified, the default time base must be considered to be
+ <code>media</code>.</p>
+ <p>A <code>ttp:timeBase</code> attribute is considered to be significant only
+ when specified on the <code>tt</code> element.</p>
+ <p>When operating with either <code>media</code> or <code>smpte</code> time
+ bases, a diachronic presentation of a document instance may be subject to
+ transformations of the controlling time line, such as temporal reversal,
+ dilation (expansion), or constriction (compression); however, when operating
+ with the <code>clock</code> time base, no transformations are permitted, and
+ diacrhonic presentation proceeds on a linear, monotonically increasing time
+ line based on the passage of real time.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Due to there being only one time base parameter that applies to a given
+ document instance, the interpretation of time expressions is uniform
+ throughout the document instance.</p>
+ </div>
+ </div>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="content" id="content"></a>7 Content</h2>
+ <p>This section specifies the <em>content</em> matter of the core vocabulary
+ catalog.</p>
+ <div class="div2">
+ <h3><a name="content-element-vocabulary"
+ id="content-element-vocabulary"></a>7.1 Element Vocabulary</h3>
+ <p>The following elements specify the structure and principal content aspects
+ of a document instance:</p>
+ <ul>
+ <li>
+ <p><a href="#document-structure-vocabulary-tt"><b>7.1.1 tt</b></a></p>
+ </li>
+ <li>
+ <p><a href="#document-structure-vocabulary-head"><b>7.1.2 head</b></a></p>
+ </li>
+ <li>
+ <p><a href="#document-structure-vocabulary-body"><b>7.1.3 body</b></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-div"><b>7.1.4 div</b></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-p"><b>7.1.5 p</b></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-span"><b>7.1.6 span</b></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-br"><b>7.1.7 br</b></a></p>
+ </li>
+ </ul>
+ <div class="div3">
+ <h4><a name="document-structure-vocabulary-tt"
+ id="document-structure-vocabulary-tt"></a>7.1.1 tt</h4>
+ <p>The <code>tt</code> element serves as the root, document element of a
+ document instance.</p>
+ <p>The <code>tt</code> element accepts as its children zero or one
+ <code>head</code> element followed by zero or one <code>body</code>
+ element.</p>
+ <table summary="HTML Table" id="elt-syntax-tt" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: tt
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<tt
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang"><span class="reqattr">xml:lang</span></a> = string
+ <a
+href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>) : default
+ {<em>any attribute in TT Parameter namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#document-structure-vocabulary-head">head</a>?, <a
+href="#document-structure-vocabulary-body">body</a>?
+</tt>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The temporal beginning and ending of a document instance represented by a
+ <code>tt</code> element is defined in relationship with some external
+ application or presentation context. The temporal interval defined by these
+ points is referred to subsequently as the <em>external time
+ interval</em>.</p>
+ <p>A document instance has an implicit duration that is equal to the implicit
+ duration of the <code>body</code> element of the document, if present, or
+ zero, if not present.</p>
+ <p>An <code>xml:lang</code> attribute must be specified on the
+ <code>tt</code> element. If the attribute value is empty, it signifies that
+ there is no default language that applies to the text contained within the
+ document instance.</p>
+ <p>If no <code>xml:space</code> attribute is specified upon the
+ <code>tt</code> element, then it must be considered as if the attribute had
+ been specified with a value of <code>default</code>.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="document-structure-vocabulary-head"
+ id="document-structure-vocabulary-head"></a>7.1.2 head</h4>
+ <p>The <code>head</code> element is a container element used to group header
+ matter, including metadata, styling, and layout information.</p>
+ <p>The <code>head</code> element accepts as its children zero or more
+ elements in the <code>Metadata.class</code> element group, followed by zero
+ or one <code>styling</code> element, followed by zero or one
+ <code>layout</code> element.</p>
+ <p>Any metadata specified by children in the <code>Metadata.class</code>
+ element group applies semantically to the document instance as a whole, and
+ not just the <code>head</code> element.</p>
+ <p>A <code>styling</code> child element is used to specify style constructs
+ that are referenced from other style constructs, by layout constructs, and by
+ content elements.</p>
+ <p>A <code>layout</code> child element is used to specify layout constructs
+ that are referenced by content elements.</p>
+ <table summary="HTML Table" id="elt-syntax-head" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: head
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<head
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a
+href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#styling-vocabulary-styling">styling</a>?, <a
+href="#layout-vocabulary-layout">layout</a>?
+</head>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>To the extent that time semantics apply to the content of the
+ <code>head</code> element, the implied time interval of this element is
+ defined to be coterminous with the external time interval.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="document-structure-vocabulary-body"
+ id="document-structure-vocabulary-body"></a>7.1.3 body</h4>
+ <p>The <code>body</code> element functions as a logical container and a
+ temporal structuring element for a sequence of textual content units
+ represented as logical divisions.</p>
+ <p>The <code>body</code> element accepts as its children zero or more
+ elements in the <code>Metadata.class</code> element group, followed by zero
+ or more elements in the <code>Animation.class</code> element group, followed
+ by zero or more <code>div</code> elements.</p>
+ <p>Any metadata specified by children in the <code>Metadata.class</code>
+ element group applies semantically to the <code>body</code> element and its
+ descendants as a whole.</p>
+ <p>Any animation elements specified by children in the
+ <code>Animation.class</code> element group apply semantically to the
+ <code>body</code> element.</p>
+ <table summary="HTML Table" id="elt-syntax-body" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: body
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<body
+ <a href="#timing-attribute-begin">begin</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-dur">dur</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-end">end</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#layout-attribute-region">region</a> = IDREF
+ <a href="#style-attribute-style">style</a> = IDREFS
+ <a
+href="#timing-attribute-timeContainer">timeContainer</a> = (<em>par</em>|<em>seq</em>)
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute in TT Metadata namespace ...</em>}
+ {<em>any attribute in TT Style namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#element-vocab-group-table">Animation.class</a>*, <a
+href="#content-vocabulary-div">div</a>*
+</body>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>An author may specify a temporal interval for a <code>body</code> element
+ using the <code>begin</code>, <code>dur</code>, and <code>end</code>
+ attributes. If the begin point of this interval remains unspecified, then the
+ begin point is interpreted as the begin point of the external time interval.
+ Similarly, if the end point of this interval remains unspecified, then the
+ end point is interpreted as the end point of the external time interval.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>A TT AF document instance referenced from a SMIL presentation is
+ expected to follow the same timing rules as apply to other SMIL media
+ objects.</p>
+ </div>
+ <p>If relative begin or end times are specified on the <code>body</code>
+ element, then these times are resolved by reference to the begin and end time
+ of the external time interval.</p>
+ <p>If the external time interval is shorter than the computed duration of the
+ <code>body</code> element, then the active time interval of a document
+ instance is truncated to the active end point of the external time
+ interval.</p>
+ <p>If no <code>timeContainer</code> attribute is specified, then a
+ <code>body</code> element must be interpreted as having <em>sequential</em>
+ time containment semantics.</p>
+ <p>If the <code>tts:extent</code> attribute is specified on the
+ <code>body</code> element, then it specifies the spatial extent of the root
+ container region in which content regions are located and presented. If no
+ <code>tts:extent</code> attribute is specified, then the spatial extent of
+ the root container region is considered to be determined by the external
+ authoring or presentation context.</p>
+ <p>An author may associate a set of style properties with a <code>body</code>
+ element by means of either the <code>style</code> attribute or inline style
+ attributes or a combination thereof.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Style properties that are associated with a <code>body</code> element in
+ a document instance are available for style inheritance by descendant
+ content elements such as <code>div</code>, <code>p</code>, and
+ <code>span</code>.</p>
+ </div>
+ <p>The declared value of an inline style attribute on a <code>body</code>
+ element must not be <code>inherit</code>.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="content-vocabulary-div" id="content-vocabulary-div"></a>7.1.4
+ div</h4>
+ <p>The <code>div</code> element functions as a logical container and a
+ temporal structuring element for a sequence of textual content units
+ represented as logical paragraphs.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>When rendered on a continuous (non-paged) visual presentation medium, a
+ <code>div</code> element is expected to generate a single block area that
+ contains zero or more child block areas generated by the <code>div</code>
+ element's child <code>p</code> elements.</p>
+ <p>If the single block area generated by a <code>div</code> element does
+ not contain any child areas, then it is not expected to be presented.</p>
+ </div>
+ <p>The <code>div</code> element accepts as its children zero or more elements
+ in the <code>Metadata.class</code> element group, followed by zero or more
+ elements in the <code>Animation.class</code> element group, followed by zero
+ or more <code>p</code> elements.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The core vocabulary intentionally does not support nested divisions in
+ order to reduce the complexity of the profile to match that of the legacy
+ distribution formats with which the core vocabulary was designed to
+ interoperate.</p>
+ </div>
+ <p>Any metadata specified by children in the <code>Metadata.class</code>
+ element group applies semantically to the <code>div</code> element and its
+ descendants as a whole.</p>
+ <p>Any animation elements specified by children in the
+ <code>Animation.class</code> element group apply semantically to the
+ <code>div</code> element.</p>
+ <table summary="HTML Table" id="elt-syntax-div" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: div
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<div
+ <a href="#timing-attribute-begin">begin</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-dur">dur</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-end">end</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#layout-attribute-region">region</a> = IDREF
+ <a href="#style-attribute-style">style</a> = IDREFS
+ <a
+href="#timing-attribute-timeContainer">timeContainer</a> = (<em>par</em>|<em>seq</em>)
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute in TT Metadata namespace ...</em>}
+ {<em>any attribute in TT Style namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#element-vocab-group-table">Animation.class</a>*, <a
+href="#element-vocab-group-table">Block.class</a>*
+</div>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If no <code>timeContainer</code> attribute is specified, then a
+ <code>div</code> element must be interpreted as having <em>parallel</em> time
+ containment semantics.</p>
+ <p>An author may associate a set of style properties with a <code>div</code>
+ element by means of either the <code>style</code> attribute or inline style
+ attributes or a combination thereof.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Style properties that are associated to a <code>div</code> element in a
+ document instance are available for style inheritance by descendant content
+ elements such as <code>p</code> and <code>span</code>.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="content-vocabulary-p" id="content-vocabulary-p"></a>7.1.5 p</h4>
+ <p>A <code>p</code> element represents a logical paragraph, serving as a
+ transition between block level and inline level formatting semantics.</p>
+ <p>The <code>p</code> element accepts as its children zero or more elements
+ in the <code>Metadata.class</code> element group, followed by zero or more
+ elements in the <code>Animation.class</code> element group, followed by zero
+ or more <code>span</code> element, <code>br</code> element, or text nodes
+ interpreted as anonymous spans.</p>
+ <p>Any metadata specified by children in the <code>Metadata.class</code>
+ element group applies semantically to the <code>p</code> element and its
+ descendants as a whole.</p>
+ <p>Any animation elements specified by children in the
+ <code>Animation.class</code> element group apply semantically to the
+ <code>p</code> element.</p>
+ <table summary="HTML Table" id="elt-syntax-p" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: p
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<p
+ <a href="#timing-attribute-begin">begin</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-dur">dur</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-end">end</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#layout-attribute-region">region</a> = IDREF
+ <a href="#style-attribute-style">style</a> = IDREFS
+ <a
+href="#timing-attribute-timeContainer">timeContainer</a> = (<em>par</em>|<em>seq</em>)
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute in TT Metadata namespace ...</em>}
+ {<em>any attribute in TT Style namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#element-vocab-group-table">Animation.class</a>*, <a
+href="#element-vocab-group-table">Inline.class</a>*
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If a sequence of children of a <code>p</code> element consists solely of
+ character information items, then that sequence must be considered to be an
+ <em>anonymous span</em> for the purpose of applying style properties that
+ apply to <code>span</code> elements.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="content-vocabulary-span" id="content-vocabulary-span"></a>7.1.6
+ span</h4>
+ <p>The <code>span</code> element functions as a logical container and a
+ temporal structuring element for a sequence of textual content units having
+ inline level formatting semantics.</p>
+ <p>When presented on a visual medium, a <code>span</code> element is intended
+ to generate a sequence of inline areas, each containing one or more glyph
+ areas.</p>
+ <p>The <code>span</code> element accepts as its children zero or more
+ elements in the <code>Metadata.class</code> element group, followed by zero
+ or more elements in the <code>Animation.class</code> element group, followed
+ by zero or more <code>br</code> element or text nodes interpreted as
+ anonymous spans.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The core vocabulary intentionally does not support nested spans in order
+ to reduce the complexity of the profile to match that of the legacy
+ distribution formats with which the core vocabulary was designed to
+ interoperate.</p>
+ </div>
+ <p>Any metadata specified by children in the <code>Metadata.class</code>
+ element group applies semantically to the <code>span</code> element and its
+ descendants as a whole.</p>
+ <p>Any animation elements specified by children in the
+ <code>Animation.class</code> element group apply semantically to the
+ <code>span</code> element.</p>
+ <table summary="HTML Table" id="elt-syntax-span" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: span
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<span
+ <a href="#timing-attribute-begin">begin</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-dur">dur</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-end">end</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#layout-attribute-region">region</a> = IDREF
+ <a href="#style-attribute-style">style</a> = IDREFS
+ <a
+href="#timing-attribute-timeContainer">timeContainer</a> = (<em>par</em>|<em>seq</em>)
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute in TT Metadata namespace ...</em>}
+ {<em>any attribute in TT Style namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#element-vocab-group-table">Animation.class</a>*, <a
+href="#element-vocab-group-table">Inline.class</a>*
+</span>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="content-vocabulary-br" id="content-vocabulary-br"></a>7.1.7
+ br</h4>
+ <p>The <code>br</code> element denotes an explicit line break.</p>
+ <table summary="HTML Table" id="elt-syntax-br" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: br
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<br
+ <a href="#style-attribute-style">style</a> = IDREFS
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute in TT Metadata namespace ...</em>}
+ {<em>any attribute in TT Style namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#element-vocab-group-table">Animation.class</a>*
+</br>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>When presented on a visual medium, the presence of a <code>br</code>
+ element must be interpreted as a forced line break.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The visual presentation of a <code>br</code> element is intended to
+ produce the same effect as the ASCII control code <code>CR</code> followed
+ by the control code <code>NL</code> when presented on a teletype device.
+ Therefore, two <code>br</code> elements in sequence will produce a
+ different effect than a single <code>br</code> element.</p>
+ </div>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="content-attribute-vocabulary"
+ id="content-attribute-vocabulary"></a>7.2 Attribute Vocabulary</h3>
+ <p>This section defines the following common attributes used with many or all
+ element types in the core vocabulary catalog:</p>
+ <ul>
+ <li>
+ <p><a href="#content-attribute-id"><b>7.2.1 xml:id</b></a></p>
+ </li>
+ <li>
+ <p><a href="#content-attribute-lang"><b>7.2.2 xml:lang</b></a></p>
+ </li>
+ <li>
+ <p><a href="#content-attribute-space"><b>7.2.3 xml:space</b></a></p>
+ </li>
+ </ul>
+ <div class="div3">
+ <h4><a name="content-attribute-id" id="content-attribute-id"></a>7.2.1
+ xml:id</h4>
+ <p>The <code>xml:id</code> attribute is used as defined by <a
+ href="#xmlid">[XML ID]</a>.</p>
+ <p>The <code>xml:id</code> attribute may be used with any element in the core
+ vocabulary catalog.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="content-attribute-lang" id="content-attribute-lang"></a>7.2.2
+ xml:lang</h4>
+ <p>The <code>xml:lang</code> attribute is used as defined by <a
+ href="#xml11">[XML 1.1]</a>, §2.12, <em>Language Identification</em>.</p>
+ <p>The <code>xml:lang</code> attribute must be specified on the
+ <code>tt</code> element and may be specified by an instance of any other
+ element type in the core vocabulary catalog.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="content-attribute-space" id="content-attribute-space"></a>7.2.3
+ xml:space</h4>
+ <p>The <code>xml:space</code> attribute is used as defined by <a
+ href="#xml11">[XML 1.1]</a>, §2.10, <em>White Space Handling</em>.</p>
+ <p>The <code>xml:space</code> attribute may be used with any element in the
+ core vocabulary catalog.</p>
+ <p>The semantics of the value <code>default</code> are fixed to mean that
+ when performing presentation processing of a document instance as described
+ by <a href="#semantics-region-layout-step-2"><b>9.3.2 Synchronic Flow
+ Processing</b></a>, processing must occur as if the following properties were
+ specified on the affected elements of the intermediate XSL-FO document:</p>
+ <ul>
+ <li>
+ <p><code>suppress-at-line-break="auto"</code></p>
+ </li>
+ <li>
+ <p><code>linefeed-treatment="treat-as-space"</code></p>
+ </li>
+ <li>
+ <p><code>white-space-collapse="true"</code></p>
+ </li>
+ <li>
+ <p>
+ <code>white-space-treatment="ignore-if-surrounding-linefeed"</code></p>
+ </li>
+ </ul>
+ <p>Similarly, the semantics of the value <code>preserve</code> are fixed to
+ mean that when performing presentation processing, processing must occur as
+ if the following properties were specified on the affected elements of the
+ intermediate XSL-FO document:</p>
+ <ul>
+ <li>
+ <p><code>suppress-at-line-break="retain"</code></p>
+ </li>
+ <li>
+ <p><code>linefeed-treatment="preserve"</code></p>
+ </li>
+ <li>
+ <p><code>white-space-collapse="false"</code></p>
+ </li>
+ <li>
+ <p><code>white-space-treatment="preserve"</code></p>
+ </li>
+ </ul>
+ <p>When performing other types of processing intended to eventually result in
+ a visual presentation by means other than those described in this
+ specification, the semantics of space collapsing and preservation as
+ described above should be respected. For other types of processing, the
+ treatment of the <code>xml:space</code> attribute is processor dependent, but
+ should respect the semantics described above if possible.</p>
+ </div>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="styling" id="styling"></a>8 Styling</h2>
+ <p>This section specifies the <em>styling</em> matter of the core vocabulary
+ catalog, where styling is to be understood as a separable layer of information
+ that applies to content and that denotes authorial intentions about the
+ presentation of that content.</p>
+ <p>No normative use of an <code><?xml-stylesheet ... ?></code> processing
+ instruction is defined by this specification.</p>
+ <div class="div2">
+ <h3><a name="styling-element-vocabulary"
+ id="styling-element-vocabulary"></a>8.1 Element Vocabulary</h3>
+ <p>The following elements specify the structure and principal styling aspects
+ of a document instance:</p>
+ <ul>
+ <li>
+ <p><a href="#styling-vocabulary-styling"><b>8.1.1 styling</b></a></p>
+ </li>
+ <li>
+ <p><a href="#styling-vocabulary-style"><b>8.1.2 style</b></a></p>
+ </li>
+ </ul>
+ <div class="div3">
+ <h4><a name="styling-vocabulary-styling"
+ id="styling-vocabulary-styling"></a>8.1.1 styling</h4>
+ <p>The <code>styling</code> element is a container element used to group
+ styling matter, including metadata that applies to styling matter.</p>
+ <p>The <code>styling</code> element accepts as its children zero or more
+ elements in the <code>Metadata.class</code> element group, followed by zero
+ or more <code>style</code> elements.</p>
+ <table summary="HTML Table" id="elt-syntax-styling" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: styling
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<styling
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#styling-vocabulary-style">style</a>*
+</styling>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>To the extent that time semantics apply to the content of the
+ <code>styling</code> element, the implied time interval of this element is
+ defined to be coterminous with the external time interval.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="styling-vocabulary-style"
+ id="styling-vocabulary-style"></a>8.1.2 style</h4>
+ <p>The <code>style</code> element is used to define a single style
+ specification or a set of style specifications.</p>
+ <p>The <code>style</code> element accepts as its children zero or more
+ <code>metadata</code> elements.</p>
+ <table summary="HTML Table" id="elt-syntax-style" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: style
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<style
+ <a href="#style-attribute-style">style</a> = IDREFS
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute in TT Style namespace ...</em>}
+ {<em>any attribute in TT Style Extension namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*
+</style>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The declared value of an inline style attribute on a <code>style</code>
+ element must not be <code>inherit</code>.</p>
+ <p>A <code>style</code> element is considered to define a <em>computed style
+ specification set</em>, where the set is determined using the following
+ ordered rules:</p>
+ <ol type="1">
+ <li>
+ <p>If a <code>style</code> attribute is specified on the
+ <code>style</code> element, then the set must be initialized so as to
+ include each style specification contained in the <em>computed style
+ specification set</em> of each element referenced by the
+ <code>style</code> attribute. If the same named style property is
+ specified by more than one such referenced computed style specification
+ set, then the value of the named style property in following referenced
+ sets takes precedence over the value of the named style property in prior
+ referenced sets, where following and prior are determined according to
+ the order of the referenced ID in the IDREFS value of the
+ <code>style</code> attribute.</p>
+ </li>
+ <li>
+ <p>If the <code>style</code> element specifies an attribute from the TT
+ Style Namespace or TT Style Extension Namespace, then each style
+ specification defined by that attribute either overrides an existing
+ style specification already contained within the set or augments the set
+ with a new style specification according to whether or not the named
+ style property of the style specification matches the named style
+ property of an existing style specification already included in the
+ set.</p>
+ </li>
+ </ol>
+ <p>Two named style properties are considered to match if their expanded names
+ match, where <em>expanded name</em> is defined by <a href="#xmlns11">[XML
+ Namespaces 1.1]</a>, §2.1, and the expanded name of a named style property is
+ the expanded name of the attribute that specifies the named style
+ property.</p>
+ <p>If a <code>style</code> element appears as a descendant of a
+ <code>region</code> element, then the <code>style</code> element must be
+ ignored for the purpose of computing referential styles as defined by <a
+ href="#semantics-style-association-referential"><b>8.4.2 Referential
+ Styling</b></a> and <a
+ href="#semantics-style-association-chained-referential"><b>8.4.3 Chained
+ Referential Styling</b></a>.</p>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="styling-attribute-vocabulary"
+ id="styling-attribute-vocabulary"></a>8.2 Attribute Vocabulary</h3>
+ <p>This section defines the <a href="#style-attribute-style"><b>8.2.1
+ style</b></a> attribute used with both style definition elements as well as
+ content elements.</p>
+ <p>In addition, this section specifies the following attributes in the TT Style
+ Namespace for use with style definition elements, certain layout elements, and
+ content elements that support inline style specifications:</p>
+ <ul>
+ <li>
+ <p><a href="#style-attribute-backgroundColor"><b>8.2.2
+ tts:backgroundColor</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-color"><b>8.2.3 tts:color</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-direction"><b>8.2.4 tts:direction</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-display"><b>8.2.5 tts:display</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-displayAlign"><b>8.2.6
+ tts:displayAlign</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-dynamicFlow"><b>8.2.7
+ tts:dynamicFlow</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-extent"><b>8.2.8 tts:extent</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-fontFamily"><b>8.2.9
+ tts:fontFamily</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-fontSize"><b>8.2.10 tts:fontSize</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-fontStyle"><b>8.2.11 tts:fontStyle</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-fontWeight"><b>8.2.12
+ tts:fontWeight</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-lineHeight"><b>8.2.13
+ tts:lineHeight</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-opacity"><b>8.2.14 tts:opacity</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-origin"><b>8.2.15 tts:origin</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-overflow"><b>8.2.16 tts:overflow</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-padding"><b>8.2.17 tts:padding</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-showBackground"><b>8.2.18
+ tts:showBackground</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-textAlign"><b>8.2.19 tts:textAlign</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-textDecoration"><b>8.2.20
+ tts:textDecoration</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-textOutline"><b>8.2.21
+ tts:textOutline</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-unicodeBidi"><b>8.2.22
+ tts:unicodeBidi</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-visibility"><b>8.2.23
+ tts:visibility</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-wrapOption"><b>8.2.24
+ tts:wrapOption</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-writingMode"><b>8.2.25
+ tts:writingMode</b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-attribute-zIndex"><b>8.2.26 tts:zIndex</b></a></p>
+ </li>
+ </ul>
+ <p>Unless explicitly stated otherwise, linear white-space (LWSP) may appear
+ between tokens of a value of a TT Style Property.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>This specification makes use of <em>lowerCamelCased</em> local names for
+ style attributes that are based upon like-named properties defined by <a
+ href="#xsl10">[XSL 1.0]</a>. This convention is likewise extended to token
+ values of such properties.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>A style property may be expressed as a specified attribute on any content
+ element type independently of whether the property applies to that element
+ type. This capability permits the expression of an inheritable style property
+ on ancestor elements to which the property property does not apply.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-style" id="style-attribute-style"></a>8.2.1
+ style</h4>
+ <p>The <code>style</code> attribute is used to reference one or more
+ <code>style</code> elements each of which define a computed style
+ specification set.</p>
+ <p>The <code>style</code> attribute may be specified by an instance of the
+ following element types:</p>
+ <ul>
+ <li>
+ <p><a
+ href="#document-structure-vocabulary-body"><code>body</code></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-div"><code>div</code></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-p"><code>p</code></a></p>
+ </li>
+ <li>
+ <p><a href="#layout-vocabulary-region"><code>region</code></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-span"><code>span</code></a></p>
+ </li>
+ <li>
+ <p><a href="#styling-vocabulary-style"><code>style</code></a></p>
+ </li>
+ </ul>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>See the specific element type definitions that permit use of the
+ <code>style</code> attribute for further information on its semantics.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-backgroundColor"
+ id="style-attribute-backgroundColor"></a>8.2.2 tts:backgroundColor</h4>
+ <p>The <code>tts:backgroundColor</code> attribute is used to specify a style
+ property that defines the background color of a region or an area generated
+ by content flowed into a region.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-backgroundColor"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#style-value-color"><color></a> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>transparent</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-body"><code>body</code></a>, <a
+ href="#content-vocabulary-div"><code>div</code></a>, <a
+ href="#content-vocabulary-p"><code>p</code></a>, <a
+ href="#layout-vocabulary-region"><code>region</code></a>, <a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The <code>tts:backgroundColor</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-backgroundColor-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Background Color
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="306px 114px"/>
+ <style <span class="strong">tts:backgroundColor="red"</span>/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:padding="3px 40px"/>
+</region>
+...
+<p region="r1" <span
+class="strong">tts:backgroundColor="purple"</span> tts:textAlign="center">
+ Twinkle, twinkle, little bat!<br/>
+ How <span <span
+class="strong">tts:backgroundColor="green"</span>>I wonder</span> where you're at!
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table"
+ id="style-attribute-backgroundColor-example-1-images" class="example-images">
+ <caption>
+ Example Rendition – Background Color
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/backgroundColor.png"
+ alt="TT AF backgroundColor style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.7.2.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-color" id="style-attribute-color"></a>8.2.3
+ tts:color</h4>
+ <p>The <code>tts:color</code> attribute is used to specify a style property
+ that defines the foreground color of marks associated with an area generated
+ by content flowed into a region.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-color" class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#style-value-color"><color></a> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>transparent</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For the purpose of determining applicability of this style property,
+ each character child of a <code>p</code> element is considered to be
+ enclosed in an anonymous span.</p>
+ </div>
+ <p>The <code>tts:color</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-color-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Color
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:backgroundColor="black"/>
+ <style <span class="strong">tts:color="white"</span>/>
+ <style tts:displayAlign="after"/>
+ <style tts:textAlign="center"/>
+</region>
+...
+<p region="r1">
+ In spring, when woods are <span <span
+class="strong">tts:color="green"</span>>getting green</span>,<br/>
+ I'll try and tell you what I mean.
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-color-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Color
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/color.png"
+ alt="DFXP color style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.17.1.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-direction"
+ id="style-attribute-direction"></a>8.2.4 tts:direction</h4>
+ <p>The <code>tts:direction</code> attribute is used to specify a style
+ property that defines the directionality of an embedding or override
+ according to the Unicode bidirectional algorithm.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-direction"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>ltr</code> | <code>rtl</code> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>ltr</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-p"><code>p</code></a>, <a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <p>The <code>tts:direction</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-direction-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Direction
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="265px 84px"/>
+ <style tts:padding="5px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:textAlign="center"/>
+</region>
+...
+<p region="r1">
+ Little birds are playing<br/>
+ Bagpipes on the shore,<br/>
+ <span tts:unicodeBidi="bidiOverride" <span
+class="strong">tts:direction="rtl"</span>>where the tourists snore.</span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-direction-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Direction
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/direction.png"
+ alt="DFXP direction style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.27.1.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-display" id="style-attribute-display"></a>8.2.5
+ tts:display</h4>
+ <p>The <code>tts:display</code> attribute is used to specify a style property
+ that defines whether an element is a candidate for layout and composition in
+ a region.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-display"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code> | <code>none</code> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-body"><code>body</code></a>, <a
+ href="#content-vocabulary-div"><code>div</code></a>, <a
+ href="#content-vocabulary-p"><code>p</code></a>, <a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute is <code>auto</code>, then the affected
+ element is a candidate for region layout and presentation; however, if the
+ value is <code>none</code>, then the affected element and its descendants
+ must be considered ineligible for region layout and presentation.</p>
+ <p>The <code>tts:display</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-display-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Display
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="369px 119px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="before"/>
+ <style tts:textAlign="start"/>
+</region>
+...
+<div region="r1">
+ <p dur="5s">
+ [[[
+ <span <span class="strong">tts:display="none"</span>>
+ <set begin="1s" dur="1s" <span class="strong">tts:display="auto"</span>/>
+ Beautiful soup,
+ </span>
+ <span <span class="strong">tts:display="none"</span>>
+ <set begin="2s" dur="1s" <span class="strong">tts:display="auto"</span>/>
+ so rich and green,
+ </span>
+ <span <span class="strong">tts:display="none"</span>>
+ <set begin="3s" dur="1s" <span class="strong">tts:display="auto"</span>/>
+ waiting in a hot tureen!
+ </span>
+ ]]]
+ </p>
+</div>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-display-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Display
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/display_0.png"
+ alt="DFXP display style property - [0,1)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/display_1.png"
+ alt="DFXP display style property - [1,2)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/display_2.png"
+ alt="DFXP display style property - [2,3)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/display_3.png"
+ alt="DFXP display style property - [3,4)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/display_4.png"
+ alt="DFXP display style property - [4,5)" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#css2">[CSS2]</a>, § 9.2.5.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-displayAlign"
+ id="style-attribute-displayAlign"></a>8.2.6 tts:displayAlign</h4>
+ <p>The <code>tts:displayAlign</code> attribute is used to specify a style
+ property that defines the alignment of block areas in the block progression
+ direction.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-displayAlign"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>before</code> | <code>center</code> |
+ <code>after</code> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>before</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <p>The <code>tts:displayAlign</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-displayAlign-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Display Align
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="128px 66px"/>
+ <style tts:origin="0px 0px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:displayAlign="before"</span>/>
+ <style tts:textAlign="start"/>
+</region>
+<region xml:id="r2">
+ <style tts:extent="192px 66px"/>
+ <style tts:origin="128px 66px"/>
+ <style tts:backgroundColor="green"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:displayAlign="after"</span>/>
+ <style tts:textAlign="start"/>
+</region>
+<region xml:id="r3">
+ <style tts:extent="128px 66px"/>
+ <style tts:origin="0px 132px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:displayAlign="before"</span>/>
+ <style tts:textAlign="start"/>
+</region>
+<region xml:id="r4">
+ <style tts:extent="192px 66px"/>
+ <style tts:origin="128px 198px"/>
+ <style tts:backgroundColor="green"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:displayAlign="after"</span>/>
+ <style tts:textAlign="start"/>
+</region>
+...
+<div>
+ <p region="r1">I sent a message to the fish:</p>
+ <p region="r2">I told them<br/> "This is what I wish."</p>
+ <p region="r3">The little fishes of the sea,</p>
+ <p region="r4">They sent an<br/> answer back to me.</p>
+</div>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table"
+ id="style-attribute-displayAlign-example-1-images" class="example-images">
+ <caption>
+ Example Rendition – Display Align
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/displayAlign.png"
+ alt="DFXP displayAlign style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.13.4.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-dynamicFlow"
+ id="style-attribute-dynamicFlow"></a>8.2.7 tts:dynamicFlow</h4>
+ <p>The <code>tts:dynamicFlow</code> attribute is used to specify a style
+ property that defines how to dynamically flow content into and out of a
+ region over some time interval.</p>
+ <p>This style property applies only to a region when the
+ <code>tts:overflow</code> property for that region has the value
+ <code>scroll</code>.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-dynamicFlow"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>none</code> | <a
+ href="#style-value-flowFunction"><flowFunction></a>+ <a
+ href="#style-value-flowIntervalFunction"><flowIntervalFunction></a>*</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>none</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute is <code>none</code>, then no dynamic flow
+ semantics apply.</p>
+ <p>If the value of this attribute contains a single <a
+ href="#style-value-flowFunction"><flowFunction></a>, then that flow
+ function applies equally to <em>fill into</em>, <em>reflow within</em>, and
+ <em>clear from</em> dynamic flow operations.</p>
+ <p>If a reflow <code>within()</code> flow function is specified, but no clear
+ <code>out()</code> flow function is specified, or vice-versa, then the
+ function applies equally to both <em>reflow within</em> and <em>clear
+ from</em> dynamic flow operations.</p>
+ <p>If either <code>intra()</code> or <code>inter()</code> <a
+ href="#style-value-flowIntervalFunction"><flowIntervalFunction></a> is
+ not specified, then the <code>auto</code> value for the missing <a
+ href="#style-value-flowIntervalFunction"><flowIntervalFunction></a>
+ applies.</p>
+ <p>The normative processing model for dynamic flow behavior is specified in
+ <a href="#dynamicFlowModel"><b>B Dynamic Flow Processing Model</b></a>.</p>
+ <p>The <code>tts:dynamicFlow</code> style is illustrated by the following
+ example, and depicted in an <a href="images/dynamicFlow_RU_animated.svg">SVG
+ Animation</a>.</p>
+ <table summary="HTML Table" id="style-attribute-dynamicFlow-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Dynamic Flow
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="140px 70px"/>
+ <style tts:displayAlign="after"/>
+ <style tts:backgroundColor="transparent"/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+ <style tts:fontSize="18px"/>
+ <style <span class="strong">tts:overflow="scroll"</span>/>
+ <style <span
+class="strong">tts:dynamicFlow="in(word,jump) out(line,smooth) inter(3s)"</span>/>
+</region>
+...
+<p region="r1">
+ <span tts:backgroundColor="black" tts:color="white">
+ Five o'clock tea!<br/>
+ Ever to thee,<br/>
+ Faithful I'll be,<br/>
+ Five o'clock tea!<br/>
+ <br/>
+ <br/>
+ <br/>
+ </span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-dynamicFlow-example-2-images"
+ class="example-images-bordered">
+ <caption>
+ Example Rendition – Dynamic Flow – Discrete Frames
+ </caption>
+ <col width="136px" span="1" />
+ <col width="136px" span="1" />
+ <col width="136px" span="1" />
+ <col width="136px" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_0.png"
+ alt="DFXP dynamic flow style property - frame 0" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_1.png"
+ alt="DFXP dynamic flow style property - frame 1" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_2.png"
+ alt="DFXP dynamic flow style property - frame 2" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_3.png"
+ alt="DFXP dynamic flow style property - frame 3" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_4.png"
+ alt="DFXP dynamic flow style property - frame 4" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_5.png"
+ alt="DFXP dynamic flow style property - frame 5" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_6.png"
+ alt="DFXP dynamic flow style property - frame 6" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_7.png"
+ alt="DFXP dynamic flow style property - frame 7" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_8.png"
+ alt="DFXP dynamic flow style property - frame 8" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_9.png"
+ alt="DFXP dynamic flow style property - frame 9" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_10.png"
+ alt="DFXP dynamic flow style property - frame 10" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_11.png"
+ alt="DFXP dynamic flow style property - frame 11" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_12.png"
+ alt="DFXP dynamic flow style property - frame 12" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_13.png"
+ alt="DFXP dynamic flow style property - frame 13" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_14.png"
+ alt="DFXP dynamic flow style property - frame 14" /></td>
+ <td rowspan="1" colspan="1"><img src="images/dynamicFlow_snake_15.png"
+ alt="DFXP dynamic flow style property - frame 15" /></td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-extent" id="style-attribute-extent"></a>8.2.8
+ tts:extent</h4>
+ <p>The <code>tts:extent</code> attribute is used to specify the
+ <em>width</em> and <em>height</em> of a region area (which may be the root
+ container region).</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-extent"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code> | <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-body"><code>body</code></a>, <a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">relative to width and height of root
+ container region</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute consists of two <a
+ href="#style-value-length"><length></a> specifications, then they must
+ be interpreted as <em>width</em> and <em>height</em>, where the first
+ specification is the <em>width</em>, and the second specification is the
+ <em>height</em>.</p>
+ <p>If the value of this attribute is <code>auto</code>, then the initial
+ value of the style property must be considered to be the same as the root
+ container extent. The root container extent is determined either by a
+ <code>tts:extent</code> specified on the <code>body</code> element, if
+ present, or by the external authoring context, if not present. In the former
+ case, if the width and height is expressed in terms of two <a
+ href="#style-value-length"><length></a> specifications, then these
+ specifications must be expressed as non-percentage, definite lengths using
+ pixel units.</p>
+ <p>The <code>tts:extent</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-extent-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Extent
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style <span class="strong">tts:extent="330px 122px"</span>/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:textAlign="center"/>
+</region>
+...
+<p region="r1">
+ 'Tis the voice of the Lobster:<br/>
+ I heard him declare,<br/>
+ "You have baked me too brown,<br/>
+ I must sugar my hair."
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-extent-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Extent
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/extent.png"
+ alt="DFXP extent style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-fontFamily"
+ id="style-attribute-fontFamily"></a>8.2.9 tts:fontFamily</h4>
+ <p>The <code>tts:fontFamily</code> attribute is used to specify a style
+ property that defines the font family from which glyphs are selected for
+ glyph areas generated by content flowed into a region.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-fontFamily"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1">(<a
+ href="#style-value-familyName"><familyName></a> | <a
+ href="#style-value-genericFamilyName"><genericFamilyName></a>)
+ (<code>","</code> (<a
+ href="#style-value-familyName"><familyName></a> | <a
+ href="#style-value-genericFamilyName"><genericFamilyName></a>))*
+ | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>default</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For the purpose of determining applicability of this style property,
+ each character child of a <code>p</code> element is considered to be
+ enclosed in an anonymous span.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The initial value, <code>default</code>, is a generic font family name,
+ and is further described in <a
+ href="#style-value-genericFamilyName"><b>8.3.6
+ <genericFamilyName></b></a> below.</p>
+ </div>
+ <p>The <code>tts:fontFamily</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-fontFamily-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Font Family
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="474px 146px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="center"/>
+ <style tts:textAlign="start"/>
+ <style <span class="strong">tts:fontFamily="proportionalSansSerif"</span>/>
+</region>
+...
+<div region="r1">
+ <p>
+ "The time has come," the Walrus said,<br/>
+ "to talk of many things:
+ </p>
+ <p tts:textAlign="end" <span
+class="strong">tts:fontFamily="monospaceSerif"</span>>
+ Of shoes, and ships, and sealing wax,<br/>
+ Of cabbages and kings,
+ </p>
+ <p>
+ And why the sea is boiling hot,<br/>
+ and whether pigs have wings."
+ </p>
+</div>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-fontFamily-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Font Family
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/fontFamily.png"
+ alt="DFXP fontFamily style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.8.2.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-fontSize"
+ id="style-attribute-fontSize"></a>8.2.10 tts:fontSize</h4>
+ <p>The <code>tts:fontSize</code> attribute is used to specify a style
+ property that defines the font size for glyphs that are selected for glyph
+ areas generated by content flowed into a region, where font size is
+ interpreted as a scaling transform to the font's design EM square.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-fontSize"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a>? |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>1c</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">relative to parent element's font size</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If a single <a href="#style-value-length"><length></a> value is
+ specified, then this length applies equally to horizontal and vertical
+ scaling of a glyph's EM square; if two <a
+ href="#style-value-length"><length></a> values are specified, then the
+ first expresses the horizontal scaling and the second expresses vertical
+ scaling.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Use of independent horizontal and vertical font sizes is expected to be
+ used with cell based metrics in order to denote fonts that are two rows in
+ height and one column in width.</p>
+ </div>
+ <p>If horizontal and vertical sizes are expressed independently, then the
+ metrics of the <a href="#style-value-length"><length></a> values must
+ be the same.</p>
+ <p>The <a href="#style-value-length"><length></a> value(s) used to
+ express font size must be non-negative.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For the purpose of determining applicability of this style property,
+ each character child of a <code>p</code> element is considered to be
+ enclosed in an anonymous span.</p>
+ </div>
+ <p>The <code>tts:fontSize</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-fontSize-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Font Size
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="299px 97px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="center"/>
+ <style tts:textAlign="center"/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+ <style <span class="strong">tts:fontSize="18px"</span>/>
+</region>
+...
+<p region="r1">
+ Then fill up the glasses<br/>
+ with treacle and ink,<br/>
+ Or anything else<br/>
+ that is <span <span
+class="strong">tts:fontSize="24px"</span>>pleasant</span> to drink.
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-fontSize-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Font Size
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/fontSize.png"
+ alt="DFXP fontSize style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.8.4.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-fontStyle"
+ id="style-attribute-fontStyle"></a>8.2.11 tts:fontStyle</h4>
+ <p>The <code>tts:fontStyle</code> attribute is used to specify a style
+ property that defines the font style to apply to glyphs that are selected for
+ glyph areas generated by content flowed into a region, where the mapping from
+ font style value to specific font face or style parameterization is not
+ determined by this specification.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-fontStyle"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code> | <code>italic</code> |
+ <code>oblique</code> | <code>reverseOblique</code> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For the purpose of determining applicability of this style property,
+ each character child of a <code>p</code> element is considered to be
+ enclosed in an anonymous span.</p>
+ </div>
+ <p>Use of values <code>oblique</code> and <code>reverseOblique</code> denote
+ a shear and reverse shear transformation (at an unspecified angle) in the
+ inline progression dimension. A conformant processor may perform such a
+ transform on a font in order to satisfy this authorial intent for the purpose
+ of presentation processing. If a specified font style is not available or a
+ shear or reverse shear transformation is not supported, then the processor
+ must interpret the font style as if the value <code>normal</code> were
+ specified for the purpose of presentation processing.</p>
+ <p>The <code>tts:fontStyle</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-fontStyle-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Font Style
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="331px 84px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:textAlign="center"/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+</region>
+...
+<p region="r1">
+ In autumn, when the leaves are brown,<br/>
+ Take pen and ink, and <span <span
+class="strong">tts:fontStyle="italic"</span>>write it down.</span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-fontStyle-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Font Style
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/fontStyle.png"
+ alt="DFXP fontStyle style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.8.7.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-fontWeight"
+ id="style-attribute-fontWeight"></a>8.2.12 tts:fontWeight</h4>
+ <p>The <code>tts:fontWeight</code> attribute is used to specify a style
+ property that defines the font weight to apply to glyphs that are selected
+ for glyph areas generated by content flowed into a region, where the mapping
+ from font weight value to specific font face or weight parameterization is
+ not determined by this specification.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-fontWeight"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code> | <code>bold</code> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For the purpose of determining applicability of this style property,
+ each character child of a <code>p</code> element is considered to be
+ enclosed in an anonymous span.</p>
+ </div>
+ <p>If a specified font weight is not available, then a conformant processor
+ must interpret the font weight as if the value <code>normal</code> were
+ specified for the purpose of presentation processing.</p>
+ <p>The <code>tts:fontWeight</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-fontWeight-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Font Weight
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="376px 95px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="center"/>
+ <style tts:textAlign="center"/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+</region>
+...
+<p region="r1">
+ They told me you had been to her,<br/>
+ <span <span
+class="strong">tts:fontWeight="bold"</span>>and mentioned me to him:</span><br/>
+ She gave me a good character<br/>
+ <span <span
+class="strong">tts:fontWeight="bold"</span>>but said I could not swim.</span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-fontWeight-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Font Weight
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/fontWeight.png"
+ alt="DFXP fontWeight style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.8.9.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-lineHeight"
+ id="style-attribute-lineHeight"></a>8.2.13 tts:lineHeight</h4>
+ <p>The <code>tts:lineHeight</code> attribute is used to specify a style
+ property that defines the inter-baseline separation between line areas
+ generated by content flowed into a region.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-lineHeight"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code> | <a
+ href="#style-value-length"><length></a> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-p"><code>p</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">relative to this element's font size</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute is <code>normal</code>, then the initial
+ value of the style property must be considered to be the same as the largest
+ font size that applies to any child element.</p>
+ <p>If specified as a <a href="#style-value-length"><length></a>, then
+ the length must be non-negative.</p>
+ <p>The <code>tts:lineHeight</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-lineHeight-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Line Height
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="255px 190px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="center"/>
+ <style tts:textAlign="start"/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+ <style tts:fontSize="16px"/>
+ <style <span class="strong">tts:lineHeight="32px"</span>/>
+</region>
+...
+<p region="r1">
+ He thought he saw an elephant,<br/>
+ That practised on a fife:<br/>
+ He looked again, and found it was<br/>
+ A letter from his wife.<br/>
+ "At length I realise," he said,<br/>
+ "The bitterness of Life.
+"</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-lineHeight-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Line Height
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/lineHeight.png"
+ alt="DFXP lineHeight style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.15.4.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-opacity" id="style-attribute-opacity"></a>8.2.14
+ tts:opacity</h4>
+ <p>The <code>tts:opacity</code> attribute is used to specify a style property
+ that defines the opacity (or transparency) of marks associated with a region
+ (such as a region's background color) or marks associated with areas
+ generated by a given content element to which opacity applies.</p>
+ <p>When presented onto a visual medium, the opacity of the affacted element
+ is applied uniformly and on a linear scale to all marks produced by the
+ affected element (and its descendants).</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-opacity"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#style-value-alpha"><alpha></a> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>1.0</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>An <a href="#style-value-alpha"><alpha></a> value greater than 1.0
+ must be considered equivalent to an <a
+ href="#style-value-alpha"><alpha></a> value of 1.0.</p>
+ <p>The <code>tts:opacity</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-opacity-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Opacity
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1" dur="5s">
+ <set begin="0s" dur="1s" <span class="strong">tts:opacity="1.00"</span>/>
+ <set begin="1s" dur="1s" <span class="strong">tts:opacity="0.75"</span>/>
+ <set begin="2s" dur="1s" <span class="strong">tts:opacity="0.50"</span>/>
+ <set begin="3s" dur="1s" <span class="strong">tts:opacity="0.25"</span>/>
+ <set begin="4s" dur="1s" <span class="strong">tts:opacity="0.00"</span>/>
+ <style tts:extent="304px 77px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:textAlign="center"/>
+</region>
+...
+<p region="r1">
+ The sun was shining on the sea
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-opacity-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Opacity
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/opacity_0.png"
+ alt="DFXP opacity style property - [0,1)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/opacity_1.png"
+ alt="DFXP opacity style property - [1,2)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/opacity_2.png"
+ alt="DFXP opacity style property - [2,3)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/opacity_3.png"
+ alt="DFXP opacity style property - [3,4)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/opacity_4.png"
+ alt="DFXP opacity style property - [4,5)" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#css3-color">[CSS3 Color]</a>, §
+ 3.2.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-origin" id="style-attribute-origin"></a>8.2.15
+ tts:origin</h4>
+ <p>The <code>tts:origin</code> attribute is used to specify the <em>x</em>
+ and <em>y</em> coordinates of the origin of a region area with respect to the
+ origin of the root container extent, if specified, or the external authoring
+ context, if not specified.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-origin"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code> | <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">relative to width and height of root
+ container region</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute consists of two <a
+ href="#style-value-length"><length></a> specifications, then they must
+ be interpreted as <em>x</em> and <em>y</em> coordinates, where the first
+ specification is the <em>x</em> coordinate, and the second specification is
+ the <em>y</em> coordinate.</p>
+ <p>If the value of this attribute is <code>auto</code>, then the initial
+ value of the style property must be considered to be the same as the root
+ container origin. The root container origin is determined by the external
+ authoring context.</p>
+ <p>The <code>tts:origin</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-origin-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Origin
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style <span class="strong">tts:origin="40px 40px"</span>/>
+ <style tts:extent="308px 92px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="center"/>
+ <style tts:textAlign="center"/>
+</region>
+...
+<p region="r1">
+ "To dine!" she shrieked in dragon-wrath.<br/>
+ "To swallow wines all foam and froth!<br/>
+ To simper at a table-cloth!"
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-origin-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Origin
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/origin.png"
+ alt="DFXP origin style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-overflow"
+ id="style-attribute-overflow"></a>8.2.16 tts:overflow</h4>
+ <p>The <code>tts:overflow</code> attribute is used to specify a style
+ property that defines whether a region area is clipped or not if the
+ descendant areas of the region overflow its extent.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-overflow"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>visible</code> | <code>hidden</code>
+ | <code>scroll</code> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>hidden</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute is <code>visible</code>, then content
+ should not be clipped outside of the affected region, and region composition
+ and layout must be performed as if the region's width and height were
+ infinite, but with a well-defined origin. If the value is
+ <code>hidden</code>, then content should be clipped outside of the affected
+ region.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Unless a manual line break element <code>br</code> is used by the
+ content author, a paragraph of a given region will generate no more than
+ one line area in that region if the value of the <code>tts:overflow</code>
+ style that applies to the region is <code>visible</code> and if the
+ applicable <code>tts:wrapOption</code> style is <code>noWrap</code>.</p>
+ </div>
+ <p>If the value of this attribute is <code>scroll</code>, then content is
+ dynamically flowed into and out of the affected region according to the
+ values of the <code>tts:dynamicFlow</code> style property; in this case, the
+ semantics of the <code>tts:dynamicFlow</code> apply whether or not the
+ affected region has overflowed.</p>
+ <p>The <code>tts:overflow</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-overflow-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Overflow
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="232px 40px"/>
+ <style tts:origin="0px 0px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="red"/>
+ <style tts:displayAlign="before"/>
+ <style tts:textAlign="start"/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+ <style tts:fontSize="18px"/>
+ <style tts:wrapOption="noWrap"/>
+ <style <span class="strong">tts:overflow="visible"</span>/>
+</region>
+<region xml:id="r2">
+ <style tts:extent="232px 40px"/>
+ <style tts:origin="0px 43px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="red"/>
+ <style tts:displayAlign="before"/>
+ <style tts:textAlign="start"/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+ <style tts:fontSize="18px"/>
+ <style tts:wrapOption="noWrap"/>
+ <style <span class="strong">tts:overflow="hidden"</span>/>
+</region>
+...
+<p region="r1">
+ "But wait a bit," the Oysters cried,<br/>
+ "Before we have our chat;
+</p>
+<p region="r2">
+ For some of us are out of breath,<br/>
+ And all of us are fat!"
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-overflow-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Overflow
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/overflow.png"
+ alt="DFXP overflow style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>In the above example, the <code>tts:noWrap</code> is set to
+ <code>noWrap</code> to prevent automatic line wrapping (breaking); if this
+ were not specified, then overflow would occur in the block progression
+ direction as opposed to the inline progression direction.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.20.2.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-padding" id="style-attribute-padding"></a>8.2.17
+ tts:padding</h4>
+ <p>The <code>tts:padding</code> attribute is used to specify padding (or
+ inset) space on all sides of a region area or a content area produced by a
+ content element.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-padding"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#style-value-length"><length></a> | <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> | <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> | <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>0</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">relative to width and height of region</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute consists of one <a
+ href="#style-value-length"><length></a> specification, then that length
+ applies to all edges of the affected areas. If the value consists of two <a
+ href="#style-value-length"><length></a> specifications, then the first
+ applies to the before and after edges, and the second applies to the start
+ and end edges. If three <a href="#style-value-length"><length></a>
+ specifications are provided, then the first applies to the before edge, the
+ second applies to the start and end edges, and the third applies to the after
+ edge. If four <a href="#style-value-length"><length></a> specifications
+ are provided, then they apply to before, end, after, and start edges,
+ respectively.</p>
+ <p>The <code>tts:padding</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-padding-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Padding
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="446px 104px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:textAlign="center"/>
+ <style <span class="strong">tts:padding="10px 40px"</span>/>
+</region>
+...
+<p region="r1" tts:backgroundColor="red">
+ Just the place for a Snark! I have said it twice:<br/>
+ That alone should encourage the crew.<br/>
+ Just the place for a Snark! I have said it thrice:<br/>
+ What I tell you three times is true.
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>When rendering an area to which padding applies, the background color that
+ applies to the area is rendered into the padded portion of the area.</p>
+ <table summary="HTML Table" id="style-attribute-padding-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Padding
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/padding.png"
+ alt="DFXP padding style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.29.15,
+ except that individual shorthand values map to writing mode relative
+ padding values as defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.7.31,
+ 7.7.32, 7.7.33, and 7.7.34.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-showBackground"
+ id="style-attribute-showBackground"></a>8.2.18 tts:showBackground</h4>
+ <p>The <code>tts:showBackground</code> attribute is used to specify
+ constraints on when the background color of a region is intended to be
+ presented.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-showBackground"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>always</code> |
+ <code>whenActive</code> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>always</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If the value of this attribute is <code>always</code>, then the background
+ color of a region is always rendered when performing presentation processing
+ on a visual medium; if the value is <code>whenActive</code>, then the
+ background color of a region is rendered only when some content is selected
+ into the region.</p>
+ <p>The <code>tts:showBackground</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-showBackground-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Show Background
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:origin="0px 0px"/>
+ <style tts:extent="265px 100px"/>
+ <style tts:backgroundColor="black"/>
+ <style <span class="strong">tts:showBackground="always"</span>/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="before"/>
+ <style tts:textAlign="start"/>
+</region>
+<region xml:id="r2">
+ <style tts:origin="205px 60px"/>
+ <style tts:extent="290px 100px"/>
+ <style tts:backgroundColor="red"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="before"/>
+ <style tts:textAlign="end"/>
+ <style <span class="strong">tts:showBackground="whenActive"</span>/>
+</region>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#smil21">[SMIL 2.1]</a>, § 5.3.1.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-textAlign"
+ id="style-attribute-textAlign"></a>8.2.19 tts:textAlign</h4>
+ <p>The <code>tts:textAlign</code> attribute is used to specify a style
+ property that defines how inline areas are aligned within a containing block
+ area in the inline progression direction.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-textAlign"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>left</code> | <code>center</code> |
+ <code>right</code> | <code>start</code> | <code>end</code> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>start</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-p"><code>p</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The <code>tts:textAlign</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-textAlign-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Text Align
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="355px 43px"/>
+ <style tts:origin="0px 0px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:textAlign="start"</span>/>
+</region>
+<region xml:id="r2">
+ <style tts:extent="355px 43px"/>
+ <style tts:origin="0px 47px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:textAlign="end"</span>/>
+</region>
+...
+<p region="r1">
+ Beware the Jabberwock, my son!<br/>
+ The jaws that bite, the claws that catch!
+</p>
+<p region="r2">
+ Beware the Jubjub bird, and shun<br/>
+ The frumious Bandersnatch!
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-textAlign-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Text Align
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/textAlign.png"
+ alt="DFXP textAlign style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.15.9.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-textDecoration"
+ id="style-attribute-textDecoration"></a>8.2.20 tts:textDecoration</h4>
+ <p>The <code>tts:textDecoration</code> attribute is used to specify a style
+ property that defines a text decoration effect to apply to glyph areas or
+ other inline areas that are generated by content flowed into a region.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-textDecoration"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>none</code> | [ [
+ <code>underline</code> | <code>noUnderline</code> ] || [
+ <code>throughline</code> | <code>noThroughline</code> ] || [
+ <code>overline</code> | <code>noOverline</code> ] ] |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>none</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-body"><code>body</code></a>, <a
+ href="#content-vocabulary-div"><code>div</code></a>, <a
+ href="#content-vocabulary-p"><code>p</code></a>, <a
+ href="#layout-vocabulary-region"><code>region</code></a>, <a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no, but see prose of <a href="#xsl10">[XSL
+ 1.0]</a>, § 7.16.4</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The <code>tts:textDecoration</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-textDecoration-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Text Decoration
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="385px 82px"/>
+ <style tts:origin="0px 0px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:padding="5px 2px"/>
+ <style <span class="strong">tts:textDecoration="underline"</span>/>
+</region>
+...
+<p region="r1">
+ The sea was wet<span <span
+class="strong">tts:textDecoration="noUnderline"</span>> as </span>wet<span
+ <span class="strong">tts:textDecoration="noUnderline"</span>>
+ could be,<br/>
+ The sand was dry as dry.<br/>
+ <span <span
+class="strong">tts:textDecoration="lineThrough"</span>>There weren't any</span>
+ You
+ <span <span
+class="strong">tts:textDecoration="lineThrough"</span>>couldn't</span>
+ could not see a cloud<br/>
+ Because no cloud was in the sky.
+ </span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table"
+ id="style-attribute-textDecoration-example-1-images" class="example-images">
+ <caption>
+ Example Rendition – Text Decoration
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/textDecoration.png"
+ alt="DFXP textDecoration style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.16.4.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-textOutline"
+ id="style-attribute-textOutline"></a>8.2.21 tts:textOutline</h4>
+ <p>The <code>tts:textOutline</code> attribute is used to specify a style
+ property that defines a text outline effect to apply to glyphs that are
+ selected for glyph areas generated by content flowed into a region.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-textOutline"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>none</code> | <a
+ href="#style-value-color"><color></a>? <a
+ href="#style-value-length"><length></a> <a
+ href="#style-value-length"><length></a>? |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>none</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">relative to this element's font size</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>For the purpose of determining applicability of this style property,
+ each character child of a <code>p</code> element is considered to be
+ enclosed in an anonymous span.</p>
+ </div>
+ <p>The value of this attribute consists of an optional <a
+ href="#style-value-color"><color></a> term followed by one or two <a
+ href="#style-value-length"><length></a> terms. If a <em>color</em> term
+ is present, then it denotes the outline color; if no <em>color</em> term is
+ present, the computed value of the <code>tts:color</code> applies. The first
+ <em>length</em> term denotes the outline thickness and the second length
+ term, if present, indicates the blur radius.</p>
+ <p>The <code>tts:textOutline</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-textOutline-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Text Outline
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:backgroundColor="transparent"/>
+ <style tts:color="yellow"/>
+ <style <span class="strong">tts:textOutline="black 2px 0px"</span>/>
+ <style tts:fontFamily="proportionalSansSerif"/>
+ <style tts:fontSize="24px"/>
+</region>
+...
+<p>
+ How doth the little crocodile<br/>
+ Improve its shining tail,<br/>
+ And pour the waters of the Nile<br/>
+ On every golden scale!<br/>
+ How cheerfully he seems to grin,<br/>
+ How neatly spreads his claws,<br/>
+ And welcomes little fishes in,<br/>
+ With gently smiling jaws!
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-textOutline-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Text Outline
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/textOutline.png"
+ alt="backgroundColor style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-unicodeBidi"
+ id="style-attribute-unicodeBidi"></a>8.2.22 tts:unicodeBidi</h4>
+ <p>The <code>tts:unicodeBidi</code> attribute is used to specify a style
+ property that defines a directional embedding or override according to the
+ Unicode bidirectional algorithm.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-unicodeBidi"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code> | <code>embed</code> |
+ <code>bidiOverride</code> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>normal</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-p"><code>p</code></a>, <a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <p>The <code>tts:unicodeBidi</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-unicodeBidi-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Unicode Bidirectionality
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="265px 84px"/>
+ <style tts:padding="5px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:textAlign="center"/>
+</region>
+...
+<p region="r1">
+ Little birds are playing<br/>
+ Bagpipes on the shore,<br/>
+ <span <span
+class="strong">tts:unicodeBidi="bidiOverride"</span> tts:direction="rtl">where the tourists snore.</span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-unicodeBidi-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Unicode Bidirectionality
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/unicodeBidi.png"
+ alt="DFXP unicodeBidi style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.27.6.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-visibility"
+ id="style-attribute-visibility"></a>8.2.23 tts:visibility</h4>
+ <p>The <code>tts:visibility</code> attribute is used to specify a style
+ property that defines whether generated areas are visible or not when
+ rendered on a visual presentation medium.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-visibility"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>visible</code> | <code>hidden</code>
+ | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>visible</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#document-structure-vocabulary-body"><code>body</code></a>, <a
+ href="#content-vocabulary-div"><code>div</code></a>, <a
+ href="#content-vocabulary-p"><code>p</code></a>, <a
+ href="#layout-vocabulary-region"><code>region</code></a>, <a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The <code>tts:visibility</code> style has no affect on content layout or
+ composition, but merely determines whether composed content is visible or
+ not.</p>
+ <p>The <code>tts:visibility</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-visibility-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Visibility
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="398px 121px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style/>
+</region>
+...
+<p region="r1" dur="4s">
+ <span <span class="strong">tts:visibility="hidden"</span>>
+ <set begin="1s" <span class="strong">tts:visibility="visible"</span>/>
+ Curiouser
+ </span>
+ <span <span class="strong">tts:visibility="hidden"</span>>
+ <set begin="2s" <span class="strong">tts:visibility="visible"</span>/>
+ and
+ </span>
+ <span <span class="strong">tts:visibility="hidden"</span>>
+ <set begin="3s" <span class="strong">tts:visibility="visible"</span>/>
+ curiouser!
+ </span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-visibility-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Visibility
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/visibility_0.png"
+ alt="DFXP visibility style property - [0,1)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/visibility_1.png"
+ alt="DFXP visibility style property - [1,2)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/visibility_2.png"
+ alt="DFXP visibility style property - [2,3)" /></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/visibility_3.png"
+ alt="DFXP visibility style property - [3,4)" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.28.8.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-wrapOption"
+ id="style-attribute-wrapOption"></a>8.2.24 tts:wrapOption</h4>
+ <p>The <code>tts:wrapOption</code> attribute is used to specify a style
+ property that defines whether or not automatic line wrapping (breaking)
+ applies within the context of the affected element.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-wrapOption"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>wrap</code> | <code>noWrap</code> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>wrap</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#content-vocabulary-span"><code>span</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">yes</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>For the purpose of determining applicability of this style property, each
+ character child of a <code>p</code> element is considered to be enclosed in
+ an anonymous span.</p>
+ <p>The <code>tts:wrapOption</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-wrapOption-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Wrap Option
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="192px 117px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style tts:displayAlign="after"/>
+ <style tts:overflow="hidden"/>
+ <style <span class="strong">tts:wrapOption="noWrap"</span>/>
+</region>
+...
+<p>
+ I'll tell thee everything I can:<br/>
+ There's little to relate.<br/>
+ I saw an aged aged man,<br/>
+ A-sitting on a gate."
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-wrapOption-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Wrap Option
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/wrapOption.png"
+ alt="DFXP wrapOption style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.15.13.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-writingMode"
+ id="style-attribute-writingMode"></a>8.2.25 tts:writingMode</h4>
+ <p>The <code>tts:writingMode</code> attribute is used to specify a style
+ property that defines the block and inline progression directions to be used
+ for the purpose of stacking block and inline areas within a region area.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-writingMode"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>lrtb</code> | <code>rltb</code> |
+ <code>tbrl</code> | <code>tblr</code> | <code>lr</code> |
+ <code>rl</code> | <code>tb</code> | <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>lrtb</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">none</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The <code>tts:writingMode</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-writingMode-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Writing Mode
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:extent="50px 570px"/>
+ <style tts:origin="0px 0px"/>
+ <style tts:padding="10px 3px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:writingMode="tbrl"</span>/>
+</region>
+<region xml:id="r2">
+ <style tts:extent="310px 50px"/>
+ <style tts:origin="70px 120px"/>
+ <style tts:padding="10px 3px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:writingMode="rltb"</span>/>
+</region>
+...
+<p region="r1">
+ I sometimes dig for buttered rolls,<br/>
+ Or set limed twigs for crabs:
+</p>
+<p region="r2" tts:direction="rtl" tts:unicodeBidi="bidiOverride">
+ I sometimes search the grassy knolls for the wheels of Hansom-cabs.
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/>
+ <table summary="HTML Table" id="style-attribute-writingMode-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Writing Mode
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/writingMode.png"
+ alt="DFXP writingMode style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>In the second paragraph in the above example that targets region
+ <code>r2</code>, the <code>tts:unicodeBidi</code> and
+ <code>tts:direction</code> properties are set to <code>bidiOverride</code>
+ and <code>rtl</code>, respectively, in order to override the normally
+ left-to-right directionality of characters in the Latin script.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.27.7.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-attribute-zIndex" id="style-attribute-zIndex"></a>8.2.26
+ tts:zIndex</h4>
+ <p>The <code>tts:zIndex</code> attribute is used to specify a style property
+ that defines the front-to-back ordering of region areas in the case that they
+ overlap.</p>
+ <p>This attribute may be specified by any style specification element or
+ content element that permits use of attributes in the TT Style Namespace;
+ however, this attribute applies as a style property only to those element
+ types indicated in the following table.</p>
+ <table summary="HTML Table" id="style-property-details-zIndex"
+ class="common">
+ <col width="25%" span="1" />
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Values:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code> | <a
+ href="#style-value-integer"><integer></a> |
+ <code>inherit</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Initial:</em></td>
+ <td rowspan="1" colspan="1"><code>auto</code></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Applies to:</em></td>
+ <td rowspan="1" colspan="1"><a
+ href="#layout-vocabulary-region"><code>region</code></a></td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Inherited:</em></td>
+ <td rowspan="1" colspan="1">no</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Percentages:</em></td>
+ <td rowspan="1" colspan="1">N/A</td>
+ </tr>
+ <tr>
+ <td rowspan="1" colspan="1"><em>Animatable:</em></td>
+ <td rowspan="1" colspan="1">discrete</td>
+ </tr>
+ </tbody>
+ </table>
+ <p>If two areas are associated with the same Z-index value, then, if those
+ areas overlap in space, the area(s) generated by lexically subsequent
+ elements must be rendered over area(s) generated by lexically prior elements,
+ where lexical order is defined as the postorder traversal of a document
+ instance.</p>
+ <p>The semantics of the value <code>auto</code> are those defined by <a
+ href="#xsl10">[XSL 1.0]</a>, § 7.28.9, where the <code>tt</code> element is
+ considered to establish the root stacking context.</p>
+ <p>The <code>tts:zIndex</code> style is illustrated by the following
+ example.</p>
+ <table summary="HTML Table" id="style-attribute-zIndex-example-1"
+ class="example">
+ <caption>
+ Example Fragment – Z Index
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region xml:id="r1">
+ <style tts:origin="0px 0px"/>
+ <style tts:extent="400px 100px"/>
+ <style tts:padding="5px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:zIndex="0"</span>/>
+</region>
+<region xml:id="r2">
+ <style tts:origin="100px 60px"/>
+ <style tts:extent="400px 100px"/>
+ <style tts:padding="5px"/>
+ <style tts:backgroundColor="red"/>
+ <style tts:color="white"/>
+ <style tts:textAlign="end"/>
+ <style <span class="strong">tts:zIndex="1"</span>/>
+</region>
+<region xml:id="r3">
+ <style tts:origin="0px 120px"/>
+ <style tts:extent="400px 100px"/>
+ <style tts:padding="5px"/>
+ <style tts:backgroundColor="black"/>
+ <style tts:color="white"/>
+ <style <span class="strong">tts:zIndex="2"</span>/>
+</region>
+<region xml:id="r4">
+ <style tts:origin="100px 180px"/>
+ <style tts:extent="400px 100px"/>
+ <style tts:padding="5px"/>
+ <style tts:backgroundColor="red"/>
+ <style tts:color="white"/>
+ <style tts:textAlign="end"/>
+ <style <span class="strong">tts:zIndex="3"</span>/>
+</region>
+...
+<p region="r1">
+ I passed by his garden, and marked, with one eye,<br/>
+ How the Owl and the Panther were sharing a pie.
+</p>
+<p region="r2">
+ The Panther took pie-crust, and gravy, and meat,<br/>
+ While the Owl had the dish as its share of the treat.
+</p>
+<p region="r3">
+ When the pie was all finished, the Owl, as a boon,<br/>
+ Was kindly permitted to pocket the spoon:
+</p>
+<p region="r4">
+ While the Panther received knife and fork<br/>
+ with a growl,<br/>
+ And concluded the banquet by...
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p/><p/>
+ <table summary="HTML Table" id="style-attribute-zIndex-example-1-images"
+ class="example-images">
+ <caption>
+ Example Rendition – Z Index
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1"><img src="images/zIndex.png"
+ alt="DFXP zIndex style property" /></td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The semantics of the style property represented by this attribute are
+ based upon that defined by <a href="#xsl10">[XSL 1.0]</a>, § 7.28.9.</p>
+ </div>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="styling-style-value-expressions"
+ id="styling-style-value-expressions"></a>8.3 Style Value Expressions</h3>
+ <p>Style property values include the use of the following expressions:</p>
+ <ul>
+ <li>
+ <p><a href="#style-value-alpha"><b>8.3.1 <alpha></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-color"><b>8.3.2 <color></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-digit"><b>8.3.3 <digit></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-duration"><b>8.3.4 <duration></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-familyName"><b>8.3.5
+ <familyName></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-flowFunction"><b>8.3.7
+ <flowFunction></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-flowIntervalFunction"><b>8.3.8
+ <flowIntervalFunction></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-genericFamilyName"><b>8.3.6
+ <genericFamilyName></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-hexDigit"><b>8.3.9 <hexDigit></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-integer"><b>8.3.10 <integer></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-namedColor"><b>8.3.12
+ <namedColor></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-quotedString"><b>8.3.13
+ <quotedString></b></a></p>
+ </li>
+ <li>
+ <p><a href="#style-value-string"><b>8.3.14 <string></b></a></p>
+ </li>
+ </ul>
+ <div class="div3">
+ <h4><a name="style-value-alpha" id="style-value-alpha"></a>8.3.1
+ <alpha></h4>
+ <p>An <alpha> expression is used to express an opacity value, where 0
+ means fully transparent and 1 means fully opaque.</p>
+ <table summary="HTML Table" id="alpha-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <alpha>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<alpha>
+ : <em>float</em>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>In the above syntax representation, the syntactic element
+ <em><code>float</code></em> must adhere to the lexical representation defined
+ by <a href="#xsd-2">[XML Schema Part 2]</a> § 3.2.4.1.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-color" id="style-value-color"></a>8.3.2
+ <color></h4>
+ <p>A <color> expression is used to specify a named color, exact RGB
+ color triple, or exact RGBA color tuple, where the alpha component, if
+ expressed, is maximum (255) at 100% opacity and minimum (0) at 0% opacity,
+ and where the applicable color space is defined by <a
+ href="#srgb">[SRGB]</a>.</p>
+ <table summary="HTML Table" id="color-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <color>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<color>
+ : "#" rrggbb
+ | "#" rrggbbaa
+ | "rgb" "(" r-value "," g-value "," b-value ")"
+ | "rgba" "(" r-value "," g-value "," b-value "," a-value ")"
+ | <a href="#style-value-namedColor"><namedColor></a>
+rrggbb
+ : <a href="#style-value-hexDigit"><hexDigit></a>{6}
+rrggbbaa
+ : <a href="#style-value-hexDigit"><hexDigit></a>{8}
+r-value | g-value | b-value | a-value
+ : component-value
+component-value
+ : non-negative-integer // valid range: [0,255]
+non-negative-integer
+ : <a href="#style-value-digit"><digit></a>+
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>When expressing RGB component values, these values are considered to <span
+ class="strong">not</span> be premultiplied by alpha.</p>
+ <p>For the purpose of performing presentation processing such that non-opaque
+ or non-transparent alpha or opacity values apply, then the semantics of
+ compositing functions are defined with respect to the use of the <a
+ href="#srgb">[SRGB]</a> color space for both inputs and outputs of the
+ composition function.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The use of <a href="#srgb">[SRGB]</a> for the stated semantics of
+ composition is not mean to prevent an actual processor from using some
+ other color space either for internal or external purposes. For example, a
+ presentation processor may ultimately convert the SRGB values used here to
+ the YUV color space for rendition on a television device.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-digit" id="style-value-digit"></a>8.3.3
+ <digit></h4>
+ <p>A <digit> is used to express integers and other types of numbers or
+ tokens.</p>
+ <table summary="HTML Table" id="digit-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <digit>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<digit>
+ : "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-duration" id="style-value-duration"></a>8.3.4
+ <duration></h4>
+ <p>A <duration> expression is used to express a temporal duration
+ value.</p>
+ <table summary="HTML Table" id="duration-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <duration>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<duration>
+ : <a href="#style-value-digit"><digit></a> ( "." <a
+href="#style-value-digit"><digit></a>+ )? metric
+metric
+ : "s" // seconds
+ | "ms" // milliseconds
+ | "f" // frames
+ | "t" // ticks
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>It is an error to omit the metric component of a duration.</p>
+ <p>When operating with <code>smpte</code> time base and
+ <code>discontinuous</code> mode, a duration expression must be considered to
+ denote a duration in (local) real-time, independently of the governing time
+ base.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-familyName" id="style-value-familyName"></a>8.3.5
+ <familyName></h4>
+ <p>A <familyName> expression specifies a font family name.</p>
+ <p>If the name contains a whitespace or quotation delimiter character, then
+ it must be expressed as a <quotedString>.</p>
+ <table summary="HTML Table" id="familyName-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <familyName>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<familyName>
+ : <a href="#style-value-string"><string></a>
+ | <a href="#style-value-quotedString"><quotedString></a>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-genericFamilyName"
+ id="style-value-genericFamilyName"></a>8.3.6 <genericFamilyName></h4>
+ <p>A <genericFamilyName> expression specifies a font family using a
+ general token that indicates a class of font families.</p>
+ <p>The resolution of a generic family name to a concrete font instance is
+ considered to be implementation dependent, both in the case of content
+ authoring and content interpretation.</p>
+ <table summary="HTML Table" id="genericFamilyName-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <genericFamilyName>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<genericFamilyName>
+ : "default"
+ | "monospace"
+ | "sansSerif"
+ | "serif"
+ | "monospaceSansSerif"
+ | "monospaceSerif"
+ | "proportionalSansSerif"
+ | "proportionalSerif"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The mapping between a generic (font) family name and an actual font is not
+ determined by this specification; however, the distinction of monospace
+ versus proportional and serif versus sans-serif should be maintained if
+ possible when performing presentation.</p>
+ <p>If a generic (font) family name of <code>monospace</code> is specified,
+ then it may be interpreted as equivalent to either
+ <code>monospaceSansSerif</code> or <code>monospaceSerif</code>. The generic
+ family names <code>sansSerif</code> and <code>serif</code> are to be
+ interpreted as equivalent to <code>proportionalSansSerif</code> and
+ <code>proportionalSerif</code>, respectively.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-flowFunction"
+ id="style-value-flowFunction"></a>8.3.7 <flowFunction></h4>
+ <p>A <flowFunction> expression specifies a unit of content to be
+ dynamic flowed into, within, and from a region according to an optional
+ dynamic flow style, flow transition effect, and flow transition effect
+ style.</p>
+ <table summary="HTML Table" id="flowFunction-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <flowFunction>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<flowFunction>
+ : "in(" flowArguments ")"
+ | "within(" flowArguments ")"
+ | "out(" flowArguments ")"
+flowArguments
+ : flowUnit [ "," flowStyle [ "," flowTransition [ "," flowTransitionStyle ]]]
+flowUnit
+ : "pixel"
+ | "glyph"
+ | "inline"
+ | "line"
+ | "block"
+ | "character"
+ | "word"
+ | extensionToken
+flowStyle
+ : "jump"
+ | "smooth"
+ | "fade"
+ | extensionToken
+flowTransition
+ : "barWipe"
+ | extensionToken
+flowTransitionStyle
+ : "leftToRight"
+ | "topToBottom"
+ | extensionToken
+extensionToken
+ : "x-" <token>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>Dynamic flow can be specified independently for flowing content into its
+ region, flowing it within its region, and flowing it out of its region. These
+ three phases of dynamic flow are specified using the <code>in()</code>,
+ <code>within()</code>, and <code>out()</code> flow functions
+ respectively.</p>
+ <p>Dynamic flow occurs on the basis of specific visual or semantic content
+ units. In the case of <code>pixel</code>, <code>glyph</code>,
+ <code>inline</code>, <code>line</code>, and <code>block</code>, the unit of
+ dynamic flow is based upon a visually rendered construct (<code>pixel</code>
+ or <code>glyph</code>) or upon an area of the area tree produced by
+ formatting the affected content. In the case of <code>character</code> and
+ <code>word</code>, the unit of dynamic flow is based upon a semantic unit
+ associated with one or more visually rendered or area units.</p>
+ <p>The dynamic flow unit <code>word</code> must be interpreted as being
+ dependent upon the language or writing system of the affected content. If the
+ language or writing system is unknown or unspecified, then <code>word</code>
+ is interpreted as follows:</p>
+ <ol type="1">
+ <li>
+ <p>If the affected content consists solely or mostly of Unified CJK
+ Ideographic characters or of characters of another Unicode character
+ block that are afforded similar treatment to that of Unified CJK
+ Ideographic characters, then <code>word</code> is to be interpreted as if
+ <code>character</code> were specified.</p>
+ </li>
+ <li>
+ <p>Otherwise, <code>word</code> is to be interpreted as denoting a
+ sequence of one or more characters that are not interpreted as an XML
+ whitespace character.</p>
+ </li>
+ </ol>
+ <p>When a flow unit is flowed into, within, or out of its region, the manner
+ by which the unit is flowed is controlled by the optional
+ <code>flowStyle</code> argument of the relevant flow function. If the flow
+ style is specified as <code>jump</code>, or if no flow style is specified,
+ then the flow unit is instantaneously transitioned into, within, or out of
+ the region. If the flow style is <code>smooth</code>, then the flow unit is
+ smoothly transitioned by means of pixel based exposure, movement, or hiding,
+ respectively. If the flow style is <code>fade</code>, then the flow unit is
+ faded into or out of the region by continuously incrementing or decrementing
+ the alpha component of the affected content.</p>
+ <p>In addition to the primary flow style, an optional flow transition effect
+ and flow transition effect style may be specified, in which case the
+ transition effect is additively (and simultaneously) applied to the primary
+ flow style transition.</p>
+ <p>For the permitted values of <code>flowTransition</code> and
+ <code>flowTransitionStyle</code>, the semantics specified by <a
+ href="#smil21">[SMIL 2.1]</a>, § 12.8, apply.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-flowIntervalFunction"
+ id="style-value-flowIntervalFunction"></a>8.3.8
+ <flowIntervalFunction></h4>
+ <p>A <flowIntervalFunction> expression specifies an interval or
+ duration that affects dynamic flow timing behavior.</p>
+ <table summary="HTML Table" id="flowIntervalFunction-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <flowIntervalFunction>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<flowIntervalFunction>
+ : "intra(" flowIntervalArguments ")"
+ | "inter(" flowIntervalArguments ")"
+flowIntervalArguments
+ : "auto"
+ | <a href="#style-value-duration"><duration></a>
+ | flowIntervalRate
+flowIntervalRate
+ : <a href="#style-value-digit"><digit></a>+ ( "." <a
+href="#style-value-digit"><digit></a>+ )?
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The <code>intra()</code> flow interval function is used to determine the
+ <em>computed fill interval</em> state parameter for performing dynamic flow
+ processing, which expresses the duration of time between fill timer events,
+ as specified by <a href="#flowTimerFill"><b>B.5.1 Fill Timer</b></a>, which
+ in turn, limits the dynamic flowed content fill rate.</p>
+ <p>The <code>inter()</code> flow interval function is used to determine the
+ <em>computed clear interval</em> state parameter for performing dynamic flow
+ processing, which expresses the duration of time between clear timer events,
+ as specified by <a href="#flowTimerClear"><b>B.5.2 Clear Timer</b></a>, which
+ in turn, limits the dynamic flowed content retention period.</p>
+ <p>If a <a href="#style-value-duration"><duration></a> is specified as
+ an argument to a flow interval function, then it is considered to represent a
+ <em>definite duration</em>. If a flow interval rate is specified as an
+ argument to a flow interval function, then it is considered to represent a
+ <em>definite rate</em> in units per second, where the applicable unit is
+ determined in the context of whether the rate is used with an
+ <code>intra()</code> or <code>inter()</code> flow interval function.</p>
+ <p>The computed fill and clear interval values are defined by <a
+ href="#dynamicFlowIntervalTimingCalculation"><b>B.3 Flow Interval Timing
+ Calculation</b></a>.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-hexDigit" id="style-value-hexDigit"></a>8.3.9
+ <hexDigit></h4>
+ <p>A <hexDigit> is used to express integers and other types of numbers
+ or tokens that employ base 16 arithmetic.</p>
+ <p>For the purpose of parsing, no distinction must be made between lower and
+ upper case.</p>
+ <table summary="HTML Table" id="hexDigit-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <hexDigit>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<hexDigit>
+ : <a href="#style-value-digit"><digit></a>
+ | "a" | "b" | "c" | "d" | "e" | "f"
+ | "A" | "B" | "C" | "D" | "E" | "F"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-integer" id="style-value-integer"></a>8.3.10
+ <integer></h4>
+ <p>An <integer> expression is used to express an arbitrary, signed
+ integral value.</p>
+ <table summary="HTML Table" id="integer-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <integer>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<integer>
+ : ( "+" | "-" )? <a href="#style-value-digit"><digit></a>+
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-length" id="style-value-length"></a>8.3.11
+ <length></h4>
+ <p>A <length> expression is used to express either a coordinate
+ component of point in a cartesian space or a distance between two points in a
+ cartesian space.</p>
+ <table summary="HTML Table" id="length-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <length>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<length>
+ : scalar
+ | percentage
+scalar
+ : number units
+percentage
+ : number "%"
+sign
+ : "+" | "-"
+number
+ : sign? non-negative-number
+non-negative-number
+ : non-negative-integer
+ | non-negative-real
+non-negative-integer
+ : <a href="#style-value-digit"><digit></a>+
+non-negative-real
+ : <a href="#style-value-digit"><digit></a>* "." <a
+href="#style-value-digit"><digit></a>+
+units
+ : "px"
+ | "em"
+ | "c" // abbreviation of "cell"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>It is an error to omit the units component of a scalar length value.</p>
+ <p>The semantics of the unit of measure <code>px</code> (pixel) are as
+ defined by <a href="#xsl10">[XSL 1.0]</a>, § 5.9.13.</p>
+ <p>When specified relative to a font whose size is expressed as a single
+ length measure or as two length measures of equal length, the unit of measure
+ <code>em</code> is considered to be identical to that defined by <a
+ href="#xsl10">[XSL 1.0]</a>, § 5.9.13; however, when specified relative to a
+ font whose size is expressed as two length measures of non-equal lengths,
+ then one <code>em</code> is equal to the inline progression dimension of the
+ anisomorphically scaled font when used to specify lengths in the inline
+ progression direction and equal to the block progression dimension of the
+ scaled font when used to specify lengths in the block progression
+ direction.</p>
+ <p>The semantics of the unit of measure <code>c</code> (cell) are defined by
+ the parameter <a href="#parameter-attribute-cellResolution"><b>6.2.1
+ ttp:cellResolution</b></a>.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-namedColor" id="style-value-namedColor"></a>8.3.12
+ <namedColor></h4>
+ <p>A <namedColor> is used to express an RGBA color with a convenient
+ name, and where the applicable color space is defined by <a
+ href="#srgb">[SRGB]</a>.</p>
+ <p>For the purpose of parsing, no distinction must be made between lower and
+ upper case.</p>
+ <table summary="HTML Table" id="namedColor-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <namedColor>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<namedColor>
+ : "transparent" // #00000000
+ | "black" // #000000ff
+ | "silver" // #c0c0c0ff
+ | "gray" // #808080ff
+ | "white" // #ffffffff
+ | "maroon" // #800000ff
+ | "red" // #ff0000ff
+ | "purple" // #800080ff
+ | "fuchsia" // #ff00ffff
+ | "magenta" // #ff00ffff (= fuchsia)
+ | "green" // #008000ff
+ | "lime" // #00ff00ff
+ | "olive" // #808000ff
+ | "yellow" // #ffff00ff
+ | "navy" // #000080ff
+ | "blue" // #0000ffff
+ | "teal" // #008080ff
+ | "aqua" // #00ffffff
+ | "cyan" // #00ffffff (= aqua)
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Except for <code>transparent</code>, the set of named colors specified
+ above constitutes a proper subset of the set of named colors specified by
+ <a href="#svg11">[SVG 1.1]</a>, § 4.2.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-quotedString"
+ id="style-value-quotedString"></a>8.3.13 <quotedString></h4>
+ <p>A <quotedString> is used to express a delimited string that may
+ contain a whitespace or a quotation delimiter character. Two types of
+ quotation delimiters are provided in order to accommodate strings that
+ contain the other delimiter.</p>
+ <table summary="HTML Table" id="quotedString-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <quotedString>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<quotedString>
+ : "\"" ( <em>char</em> - { "\"" } )* "\""
+ | "\'" ( <em>char</em> - { "\'" } )* "\'"
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>In the above syntax representation, the syntactic element
+ <em><code>char</code></em> must adhere to production [2] <code>Char</code> as
+ defined by <a href="#xml11">[XML 1.1]</a> § 2.2.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="style-value-string" id="style-value-string"></a>8.3.14
+ <string></h4>
+ <p>A <string> expression consists of a sequence of characters where no
+ character is a whitespace or quotation delimiter character.</p>
+ <table summary="HTML Table" id="string-style-expression-syntax"
+ class="syntax">
+ <caption>
+ Syntax Representation – <string>
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<string>
+ : ( <em>char</em> - { <em>S</em> | "\"" | "\'" } )+
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>In the above syntax representation, the syntactic element
+ <em><code>char</code></em> must adhere to production [2] <code>Char</code> as
+ defined by <a href="#xml11">[XML 1.1]</a> § 2.2, while the syntactic
+ element <em><code>S</code></em> must adhere to production [3] <code>S</code>
+ as defined by <a href="#xml11">[XML 1.1]</a> § 2.3.</p>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="semantics-style-association"
+ id="semantics-style-association"></a>8.4 Style Association</h3>
+ <p>Style matter may be associated with content matter in a number of ways:</p>
+ <ul>
+ <li>
+ <p>inline styling</p>
+ </li>
+ <li>
+ <p>referential styling</p>
+ </li>
+ <li>
+ <p>chained referential styling</p>
+ </li>
+ </ul>
+ <div class="div3">
+ <h4><a name="semantics-style-association-inline"
+ id="semantics-style-association-inline"></a>8.4.1 Inline Styling</h4>
+ <p>Style properties may be expressed in an inline manner by direct
+ specification of an attribute from the TT Style Namespace or TT Style
+ Extension Namespace on the affected element. When expressed in this manner,
+ the association of style information is referred to as <em>inline
+ styling</em>.</p>
+ <p>Style properties associated by inline styling are afforded a higher
+ priority than all other forms of style association.</p>
+ <table summary="HTML Table" id="style-association-example-1" class="example">
+ <caption>
+ Example – Inline Styling
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<p <span class="strong">tts:color="white"</span>>White 1 <span <span
+class="strong">tts:color="yellow"</span>>Yellow</span> White 2</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>In the above example, the two text fragments <code>"White 1 "</code> and
+ <code>" White 2"</code>, which are interpreted as anonymous spans, are not
+ associated with a color style property; rather, they inherit their color
+ style from their parent <code>p</code> element as described in <a
+ href="#semantics-style-inheritance-content"><b>8.5.1 Content Style
+ Inheritance</b></a> below.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="semantics-style-association-referential"
+ id="semantics-style-association-referential"></a>8.4.2 Referential
+ Styling</h4>
+ <p>Style properties may be expressed in an out-of-line manner and referenced
+ by the affected element using the <code>style</code> attribute. When
+ expressed in this manner, the association of style information is referred to
+ as <em>referential styling</em>.</p>
+ <p>If a <code>style</code> attribute specifies multiple references, then
+ those references are evaluated in the specified order, and that order applies
+ to resolution of the value of a style property in the case that it is
+ specified along multiple reference paths.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The use of referential styling encourages the reuse of style
+ specifications while sacrificing locality of reference.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>A single content element may be associated with style properties by a
+ hybrid mixture of inline and referential styling, in which case inline
+ styling is given priority as described above by <a
+ href="#semantics-style-association-inline"><b>8.4.1 Inline
+ Styling</b></a>.</p>
+ </div>
+ <table summary="HTML Table" id="style-association-example-2" class="example">
+ <caption>
+ Example – Referential Styling
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<style <span class="strong">xml:id="s1"</span> tts:color="white"/>
+<style <span class="strong">xml:id="s2"</span> tts:color="yellow"/>
+...
+<p <span class="strong">style="s1"</span>>White 1 <span <span
+class="strong">style="s2"</span>>Yellow</span> White 2</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>In the above example, the two text fragments <code>"White 1 "</code> and
+ <code>" White 2"</code>, which are interpreted as anonymous spans, are not
+ associated with a color style property; rather, they inherit their color
+ style from their parent <code>p</code> element as described in <a
+ href="#semantics-style-inheritance-content"><b>8.5.1 Content Style
+ Inheritance</b></a> below.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="semantics-style-association-chained-referential"
+ id="semantics-style-association-chained-referential"></a>8.4.3 Chained
+ Referential Styling</h4>
+ <p>Style properties may be expressed in an out-of-line manner and may
+ themselves reference other out-of-line style properties, thus creating a
+ chain of references starting at the affected element. When expressed in this
+ manner, the association of style information is referred to as <em>chained
+ referential styling</em>.</p>
+ <p>If the same style property is specified in more than one referenced
+ specification, then the last referenced style specification applies, where
+ the order of application starts from the affected element and proceeds to
+ referenced style specifications, and, in turn, to subsequent referenced style
+ specifications.</p>
+ <p>A loop in a sequence of chained style references must be considered an
+ error.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The use of chained referential styling encourages the grouping of style
+ specifications into general and specific sets, which further aids in style
+ specification reuse.</p>
+ </div>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>A single content element may be associated with style properties by a
+ hybrid mixture of inline, referential styling, and chained referential
+ styling, in which case inline styling is given priority as described above
+ by <a href="#semantics-style-association-inline"><b>8.4.1 Inline
+ Styling</b></a>.</p>
+ </div>
+ <table summary="HTML Table" id="style-association-example-3" class="example">
+ <caption>
+ Example – Chained Referential Styling
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<style <span
+class="strong">xml:id="s1"</span> tts:color="white" tts:fontFamily="monospaceSerif"/>
+<style <span class="strong">xml:id="s2"</span> <span
+class="strong">style="s1"</span> tts:color="yellow"/>
+...
+<p <span class="strong">style="s1"</span>>White Monospace</p>
+<p <span class="strong">style="s2"</span>>Yellow Monospace</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="semantics-style-inheritance"
+ id="semantics-style-inheritance"></a>8.5 Style Inheritance</h3>
+ <p>Subsequent to the association of style matter with content matter as
+ described above in <a href="#semantics-style-association"><b>8.4 Style
+ Association</b></a>, styles are further propagated to content matter using:</p>
+ <ul>
+ <li>
+ <p>content style inheritance</p>
+ </li>
+ <li>
+ <p>region style inheritance</p>
+ </li>
+ </ul>
+ <div class="div3">
+ <h4><a name="semantics-style-inheritance-content"
+ id="semantics-style-inheritance-content"></a>8.5.1 Content Style
+ Inheritance</h4>
+ <p>Style properties are inherited from ancestor elements in the following
+ case:</p>
+ <ol type="1">
+ <li>
+ <p>if a style property is not associated with an element (or an anonymous
+ span) and the style property is designated as inheritable, or</p>
+ </li>
+ <li>
+ <p>if a style property is associated with an element, that element is not
+ the <code>body</code> element, and the associated style property value is
+ <code>inherit</code>.</p>
+ </li>
+ </ol>
+ <p>If a style property is determined to require inheritance, then the
+ inherited value must be the value of the same named style property in the
+ computed style specification set of the element's immediate ancestor
+ element.</p>
+ <table summary="HTML Table" id="style-inheritance-example-1" class="example">
+ <caption>
+ Example – Content Style Inheritance
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<p <span class="strong">tts:fontFamily="monospaceSansSerif"</span>>
+ <span tts:color="yellow">Yellow Monospace</span>
+</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>In the above example, the <code>span</code> element that encloses the
+ character items <code>Yellow Monospace</code> is not associated with a
+ <code>tts:fontFamily</code> style property and this property is
+ inheritable; therefore, the value of the <code>tts:fontFamily</code> style
+ is inherited from the computed style specification set of the ancestor
+ <code>p</code> element, and is added to the computed style specification
+ set of the <code>span</code> element.</p>
+ </div>
+ </div>
+ <div class="div3">
+ <h4><a name="semantics-style-inheritance-region"
+ id="semantics-style-inheritance-region"></a>8.5.2 Region Style
+ Inheritance</h4>
+ <p>Style properties are inherited from a region element in the following
+ case:</p>
+ <ol type="1">
+ <li>
+ <p>if a style property <em>P</em> is not associated with an element (or
+ an anonymous span) <em>E</em> and the style property is designated as
+ inheritable, and</p>
+ </li>
+ <li>
+ <p>if that style property <em>P</em> is in the computed style
+ specification set of region <em>R</em> as defined by <a
+ href="#layout-vocabulary-region"><b>9.1.2 region</b></a> below, and</p>
+ </li>
+ <li>
+ <p>if that element <em>E</em> is flowed into region <em>R</em>.</p>
+ </li>
+ </ol>
+ <table summary="HTML Table" id="style-inheritance-example-2" class="example">
+ <caption>
+ Example – Region Style Inheritance
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region <span class="strong">xml:id="r1"</span>>
+ <style tts:color="yellow"/>
+ <style tts:fontFamily="monospaceSerif"/>
+</region>
+...
+<p <span class="strong">region="r1"</span>>Yellow Monospace</p>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ </div>
+ </div>
+ </div>
+ <div class="div1">
+ <h2><a name="layout" id="layout"></a>9 Layout</h2>
+ <p>This section specifies the <em>layout</em> matter of the core vocabulary
+ catalog, where layout is to be understood as a separable layer of information
+ that applies to content and that denotes authorial intentions about the
+ presentation of that content.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>The two layers of layout and style matter are considered to be independently
+ separable. Layout matter specifies one or more spaces or areas into which
+ content is intended to be presented, while style matter specifies the manner in
+ which presentation occurs within the layout.</p>
+ <p>In certain cases, a content author may choose to embed (inline) style matter
+ directly into layout or content matter. In such cases, an alternative exists –
+ use of referential styling – in which the style matter is not embedded
+ (inlined).</p>
+ </div>
+ <div class="div2">
+ <h3><a name="layout-element-vocabulary" id="layout-element-vocabulary"></a>9.1
+ Element Vocabulary</h3>
+ <p>The following elements specify the structure and principal layout aspects of
+ a document instance:</p>
+ <ul>
+ <li>
+ <p><a href="#layout-vocabulary-layout"><b>9.1.1 layout</b></a></p>
+ </li>
+ <li>
+ <p><a href="#layout-vocabulary-region"><b>9.1.2 region</b></a></p>
+ </li>
+ </ul>
+ <div class="div3">
+ <h4><a name="layout-vocabulary-layout"
+ id="layout-vocabulary-layout"></a>9.1.1 layout</h4>
+ <p>The <code>layout</code> element is a container element used to group
+ layout matter, including metadata that applies to layout matter.</p>
+ <p>The <code>layout</code> element accepts as its children zero or more
+ elements in the <code>Metadata.class</code> element group, followed by zero
+ or more <code>region</code> elements.</p>
+ <table summary="HTML Table" id="elt-syntax-layout" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: layout
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<layout
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#layout-vocabulary-region">region</a>*
+</layout>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>To the extent that time semantics apply to the content of the
+ <code>layout</code> element, the implied time interval of this element is
+ defined to be coterminous with the external time interval.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="layout-vocabulary-region"
+ id="layout-vocabulary-region"></a>9.1.2 region</h4>
+ <p>The <code>region</code> element is used to define a space or area into
+ which content is to be flowed for the purpose of presentation.</p>
+ <p>The <code>region</code> element accepts as its children zero or more
+ elements in the <code>Metadata.class</code> element group, followed by zero
+ or more elements in the <code>Animation.class</code> element group, followed
+ by zero or more <code>style</code> elements.</p>
+ <p>Any metadata specified by children in the <code>Metadata.class</code>
+ element group applies semantically to the <code>region</code> element and its
+ descendants as a whole. Any animation elements specified by children in the
+ <code>Animation.class</code> element group apply semantically to the
+ <code>region</code> element. Any <code>style</code> child element must be
+ considered a local style definition that applies only to the containing
+ <code>region</code> element, i.e., does not apply for resolving referential
+ styling.</p>
+ <table summary="HTML Table" id="elt-syntax-region" class="syntax">
+ <caption>
+ XML Representation – Element Information Item: region
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+<region
+ <a href="#timing-attribute-begin">begin</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-dur">dur</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#timing-attribute-end">end</a> = <a
+href="#timing-value-timeExpression"><timeExpression></a>
+ <a href="#style-attribute-style">style</a> = IDREFS
+ <a
+href="#timing-attribute-timeContainer">timeContainer</a> = (<em>par</em>|<em>seq</em>)
+ <a href="#content-attribute-id">xml:id</a> = ID
+ <a href="#content-attribute-lang">xml:lang</a> = string
+ <a href="#content-attribute-space">xml:space</a> = (<em>default</em>|<em>preserve</em>)
+ {<em>any attribute in TT Style namespace ...</em>}
+ {<em>any attribute not in default or any TT namespace ...</em>}>
+ <em>Content:</em> <a href="#element-vocab-group-table">Metadata.class</a>*, <a
+href="#element-vocab-group-table">Animation.class</a>*, <a
+href="#styling-vocabulary-style">style</a>*
+</region>
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The declared value of an inline style attribute on a <code>region</code>
+ element must not be <code>inherit</code>.</p>
+ <p>A <code>region</code> element is considered to define a computed style
+ specification set, where the set is determined using the following ordered
+ rules:</p>
+ <ol type="1">
+ <li>
+ <p>If a <code>style</code> attribute is specified on the
+ <code>region</code> element, then the set must be initialized so as to
+ include each style specification contained in the computed style
+ specification set of each element referenced by the <code>style</code>
+ attribute. If the same named style property is specified by more than one
+ such referenced computed style specification set, then the value of the
+ named style property in following referenced sets takes precedence over
+ the value of the named style property in prior referenced sets, where
+ following and prior are determined according to the order of the
+ referenced ID in the IDREFS value of the <code>style</code>
+ attribute.</p>
+ </li>
+ <li>
+ <p>If the <code>region</code> element has any <code>style</code> element
+ children, then each style specification of the computed style
+ specification set of each child <code>style</code> element either
+ overrides an existing style specification already contained within the
+ set or augments the set with a new style specification according to
+ whether or not the named style property of the style specification
+ matches the named style property of an existing style specification
+ already included in the set, where the order of evaluation of child
+ <code>style</code> elements proceeds from first to last such child
+ element.</p>
+ </li>
+ <li>
+ <p>If the <code>style</code> element specifies an attribute from the TT
+ Style Namespace or TT Style Extension Namespace, then each style
+ specification defined by that attribute either overrides an existing
+ style specification already contained within the set or augments the set
+ with a new style specification according to whether or not the named
+ style property of the style specification matches the named style
+ property of an existing style specification already included in the
+ set.</p>
+ </li>
+ </ol>
+ <p>Two named style properties are considered to match if their expanded names
+ match, where <em>expanded name</em> is defined by <a href="#xmlns11">[XML
+ Namespaces 1.1]</a>, §2.1, and the expanded name of a named style property is
+ the expanded name of the attribute that specifies the named style
+ property.</p>
+ <p>If <code>begin</code> and (or) <code>end</code> attributes are specified
+ on a <code>region</code> element, then they specify the beginning and (or)
+ ending points of a time interval during which the region is eligible for
+ activation and with respect to which animation child elements of the region
+ are timed. If specified, these begin and end points are relative to the time
+ interval of the nearest ancestor element associated with a time interval,
+ irregardless of whether that interval is explicit or implied.</p>
+ <p>The nearest ancestor element of a <code>region</code> element that is
+ associated with a time interval is the document instance's root
+ <code>tt</code> element.</p>
+ <p>If a <code>dur</code> attribute is specified on the <code>region</code>
+ element, then it specifies the simple duration of the region.</p>
+ <p>For the purpose of determining the semantics of presentation processing, a
+ region that is temporally inactive must not produce any visible marks when
+ presented on a visual medium.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>A <code>region</code> element may be associated with a time interval for
+ two purposes: (1) in order to temporally bound the presentation of the
+ region and its content, and (2) to provide a temporal context in which
+ animations of region styles may be effected.</p>
+ <p>For example, an author may wish a region that is otherwise empty, but
+ may have a visible background color to be presented starting at some time
+ and continuing over the region's duration. The simple duration of the
+ region serves additionaly to scope the presentation effects of content that
+ is targeted to the region. An author may also wish to move a region within
+ the root container extent or change a region's background color by means of
+ animation effects. In both of these cases, it is necessary to posit an
+ active time interval for a region.</p>
+ </div>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="layout-attribute-vocabulary"
+ id="layout-attribute-vocabulary"></a>9.2 Attribute Vocabulary</h3>
+ <p>This section defines the <a href="#layout-attribute-region"><b>9.2.1
+ region</b></a> attribute used with content elements.</p>
+ <div class="div3">
+ <h4><a name="layout-attribute-region" id="layout-attribute-region"></a>9.2.1
+ region</h4>
+ <p>The <code>region</code> attribute is used to reference a
+ <code>region</code> element which defines a space or area into which a
+ content element is intended to be flowed.</p>
+ <p>The <code>region</code> attribute may be specified by an instance of the
+ following element types:</p>
+ <ul>
+ <li>
+ <p><a
+ href="#document-structure-vocabulary-body"><code>body</code></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-div"><code>div</code></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-p"><code>p</code></a></p>
+ </li>
+ <li>
+ <p><a href="#content-vocabulary-span"><code>span</code></a></p>
+ </li>
+ </ul>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>See <a href="#semantics-region-layout"><b>9.3 Region Layout and
+ Presentation</b></a> below for further information on content flow in a
+ region.</p>
+ </div>
+ </div>
+ </div>
+ <div class="div2">
+ <h3><a name="semantics-region-layout" id="semantics-region-layout"></a>9.3
+ Region Layout and Presentation</h3>
+ <p>This section defines the semantics of region layout and presentation in
+ terms of a standard processing model. Any implementation is permitted provided
+ that the externally observable results are consistent with the results produced
+ by this model.</p>
+ <div class="div3">
+ <h4><a name="semantics-region-layout-step-1"
+ id="semantics-region-layout-step-1"></a>9.3.1 Synchronic Region
+ Construction</h4>
+ <p>For the purposes of performing presentation processing, the active time
+ duration of a document instance is divided into a sequence of time
+ coordinates where at each time coordinate, some element becomes temporally
+ active or inactive, then, at each such time coordinate, a document instance
+ is mapped from its original, source form to an intermediate form, <em>I</em>,
+ as follows:</p>
+ <ol type="1">
+ <li>
+ <p>for each temporally active region <em>R</em>, replicate the portion of
+ the document's sub-tree headed by the <code>body</code> element;</p>
+ </li>
+ <li>
+ <p>evaluating this sub-tree in a postorder traversal, prune elements if
+ they are not a content element, if they are temporally inactive, if they
+ are empty, or if they aren't associated with region <em>R</em>;</p>
+ </li>
+ <li>
+ <p>if the pruned sub-tree is non-empty, then reparent it to the
+ <em>R</em> element;</p>
+ </li>
+ <li>
+ <p>finally, after completing the above steps, prune the original
+ <code>body</code> element from the intermediate document, then prune all
+ <code>region</code>, <code>begin</code>, <code>end</code>, and
+ <code>dur</code> attributes, which are no longer semantically
+ relevant;</p>
+ </li>
+ </ol>
+ <p>The pseudo-code shown in <a
+ href="#content-hierarchy-region-mapping"><b>Example – Content Hierarchy
+ Region Mapping</b></a> provides one possible algorithm that implements these
+ processing steps.</p>
+ <table summary="HTML Table" id="content-hierarchy-region-mapping"
+ class="example">
+ <caption>
+ Example – Content Hierarchy Region Mapping
+ </caption>
+ <tbody>
+ <tr>
+ <td rowspan="1" colspan="1">
+ <div class="exampleInner">
+<pre>
+PREPARE-CONTENT ( D ) :=
+ foreach R in SELECT ( D, "/tt/head/layout/region" )
+ if TEMPORALLY-ACTIVE? ( R )
+ APPEND-CHILDREN ( R, SELECT ( D, "/tt/body" ) )
+ foreach E in POSTORDER-TRAVERSE ( R )
+ if CONTENT-ELEMENT? ( E ) and TEMPORALLY-ACTIVE? ( E )
+ if EMPTY? ( E ) or REGION-OF ( E ) != R and
+ then PRUNE ( E )
+ PRUNE ( SELECT ( D, "/tt/body" ) )
+ PRUNE ( SELECT ( D, "//*/@region" ) )
+ PRUNE ( SELECT ( D, "//*/@begin" ) )
+ PRUNE ( SELECT ( D, "//*/@end" ) )
+ PRUNE ( SELECT ( D, "//*/@dur" ) )
+
+REGION-OF ( E ) :=
+ if NULL? ( E )
+ return NULL
+ else if HAS-ATTRIBUTE? ( E, "region" )
+ return VALUE-OF-ATTRIBUTE ( E, "region" )
+ else
+ return REGION-OF ( PARENT-OF ( E ) )
+</pre>
+ </div>
+ </td>
+ </tr>
+ </tbody>
+ </table>
+ <p>The result of performing the processing described above will be a sequence
+ of <em>N</em> intermediate documents instances, <em>I<sub>0</sub></em> …
+ <em>I<sub>N−1</sub></em>.</p>
+ </div>
+ <div class="div3">
+ <h4><a name="semantics-region-layout-step-2"
+ id="semantics-region-layout-step-2"></a>9.3.2 Synchronic Flow Processing</h4>
+ <p>Subsequent to performing a temporal (synchronic) slice and subsequent
+ remapping of regionally selected content hierarchy, the resulting
+ intermediate document is subjected to a flow transformation step that
+ produces a rooted flow object tree represented as an XSL FO document instance
+ as defined by <a href="#xsl10">[XSL 1.0]</a>, and semantically extended by TT
+ AF specific style properties that have no XSL FO counterpart.</p>
+ <p>Each intermediate document produced by <a
+ href="#semantics-region-layout-step-1"><b>9.3.1 Synchronic Region
+ Construction</b></a> is mapped to an XSL FO document instance, <em>F</em>, as
+ follows:</p>
+ <ol type="1">
+ <li>
+ <p>for each significant text node in a content element that is not a
+ child of a <code>span</code> element, synthesize an anonymous span to
+ enclose the text node, substituting the new anonymous span for the
+ original text node child in its sibling and parent hierarchy;</p>
+ </li>
+ <li>
+ <p>for each element, determine its computed style specification set, if
+ applicable;</p>
+ </li>
+ <li>
+ <p>map the <code>tt</code> element to an <code>fo:root</code> element,
+ populated initially with an <code>fo:layout-master-set</code> element
+ that contains a valid <code>fo:simple-page-master</code> that, in turn,
+ contains an <code>fo:region-body</code> child, where the root container
+ extent expressed on the <code>tt</code> element is mapped to
+ <code>page-width</code> and <code>page-height</code> attributes on the
+ <code>fo:simple-page-master</code> element;</p>
+ </li>
+ <li>
+ <p>map the <code>layout</code> element to an
+ <code>fo:page-sequence</code> element and a child <code>fo:flow</code>
+ element that reference the page master and page region defined by the
+ simple page master produced above;</p>
+ </li>
+ <li>
+ <p>map each non-empty <code>region</code> element to an
+ <code>fo:block-container</code> element with an
+ <code>absolute-position</code> attribute with value
+ <code>absolute</code>, and where the region's position and extent are
+ mapped to equivalent <code>top</code>, <code>left</code>,
+ <code>width</code>, and <code>height</code> attributes;</p>
+ </li>
+ <li>
+ <p>for each <code>body</code>, <code>div</code>, and <code>p</code>
+ element that is not associated with a <code>tts:display</code> style
+ property with the value <code>none</code>, map the element to a distinct
+ <code>fo:block</code> element, populating the style properties of
+ <code>fo:block</code> by using the computed style specification set
+ associated with each original TT AF content element;</p>
+ </li>
+ <li>
+ <p>for each <code>span</code> element that is not associated with a
+ <code>tts:display</code> style property with the value <code>none</code>
+ and for each anonymous span, map the element or sequence of character
+ items to a distinct <code>fo:inline</code> element, populating the style
+ properties of <code>fo:inline</code> by using the computed style
+ specification set associated with each original TT AF content element or
+ anonymous span;</p>
+ </li>
+ <li>
+ <p>for each <code>br</code> element that is not associated with a
+ <code>tts:display</code> style property with the value <code>none</code>,
+ map the element to a distinct <code>fo:character</code> element having
+ the following properties:</p>
+ <ul>
+ <li>
+ <p><code>character="&#x000A;"</code></p>
+ </li>
+ <li>
+ <p><code>suppress-at-line-break="retain"</code></p>
+ </li>
+ </ul>
+ </li>
+ <li>
+ <p>for each TT AF style property attribute in some computed style
+ specification set that has no counterpart in <a href="#xsl10">[XSL
+ 1.0]</a>, map that attribute directly through to the relevant formatting
+ object produced by the input TT AF content element to which the style
+ property applies;</p>
+ </li>
+ <li>
+ <p>optionally, synthesize a unique <code>id</code> attribute on each
+ resulting formatting object element that relates that element to the
+ input element that resulted in that formatting object element;</p>
+ </li>
+ </ol>
+ <p>For each resulting XSL FO document instance <em>F</em>, if processing
+ requires presentation on a visual medium, then apply the formatting semantics
+ prescribed by <a href="#xsl10">[XSL 1.0]</a> in order to produce an XSL FO
+ area tree that may then be subsequently rendered onto the visual medium.</p>
+ <div class="note">
+ <p class="prefix"><b>Note:</b></p>
+ <p>Due to the possible presence of TT AF style properties or style property
+ values in a given DFXP document instance for which there is no <a
+ href="#xsl10">[XSL 1.0]</a> counterpart, the use of a compliant <a
+ href="#xsl10">[XSL 1.0]</a> formatting processor is not necessarily
+ sufficient to satisfy the presentation semantics defined by this
+ specification.</p>
+ </div>
+ </div>