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<!DOCTYPE html> |
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<html lang="en" class="formal-specification status-work-in-progress"> |
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<head> |
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<title>Selectors Serialization Format for Testing (SSFT) Specification</title> |
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<link rel="stylesheet" href="http://suika.fam.cx/www/style/html/spec"> |
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<link rel="license" href="http://suika.fam.cx/c/gnu/fdl"> |
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</head> |
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<body class="has-abstract"> |
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|
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<div class="header"> |
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<h1>Selectors Serialization Format for Testing (<abbr>SSFT</abbr>) |
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Specification</h1> |
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<h2>Working Draft <time datetime=2007-10-28>28 October 2007</time></h2> |
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|
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<dl class="versions-uri"> |
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<dt>This Version</dt> |
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<dd><code class="URI"><<a href="http://suika.fam.cx/www/markup/selectors/ssft/ssft" |
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>http://suika.fam.cx/www/markup/selectors/ssft/ssft</a>></code></dd> |
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<dt>Latest Version</dt> |
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<dd><code class="URI"><<a href="http://suika.fam.cx/www/markup/selectors/ssft/ssft" |
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>http://suika.fam.cx/www/markup/selectors/ssft/ssft</a>></code></dd> |
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<!-- |
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<dt>Latest Working Draft</dt> |
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--> |
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<!-- <dt>Previous Version</dt> --> |
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<dt>Version History</dt> |
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<dd><code class=URI><<a href="http://suika.fam.cx/gate/cvs/markup/selectors/ssft/ssft.en.html">http://suika.fam.cx/gate/cvs/markup/selectors/ssft/ssft.en.html</a>></code></dd> |
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</dl> |
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<dl class="authors" id="author"> |
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<dt>Author</dt> |
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<dd><a href="http://suika.fam.cx/~wakaba/who?" rel="author" |
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lang=ja>Wakaba</a> |
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<code class="mail"><<a href="mailto:w@suika.fam.cx" rel="author" |
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>w@suika.fam.cx</a>></code></dd> |
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</dl> |
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|
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<p class="copyright" lang="en">© <time>2007</time> <a |
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href="http://suika.fam.cx/~wakaba/who?" rel="author">Wakaba</a>. |
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Permission is granted to copy, distribute and/or modify this document |
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under the terms of the <a rel="license" |
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href="http://www.gnu.org/copyleft/fdl.html">GNU Free Documentation License</a>, |
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Version 1.2 |
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or any later version published by the <a |
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href="http://www.fsf.org/">Free Software Foundation</a>; |
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with no Invariant Sections, no Front$B!>(BCover Texts, and no Back$B!>(BCover |
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Texts. A copy of the license is |
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available at <code class="URI"><<a |
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href="http://www.gnu.org/copyleft/fdl.html" |
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rel="license">http://www.gnu.org/copyleft/fdl.html</a>></code>.</p> |
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</div> |
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|
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<div id="abstract" class="section"> |
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<h2>Abstract</h2> |
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|
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<div class="ed issue">...</div> |
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|
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</div> |
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|
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<div id="status" class="section"> |
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<h2>Status of This Document</h2> |
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|
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<p class=section-info><em>This section describes the status of this document |
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at the time of its publication. Other documents |
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might supersede this document.</em></p> |
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|
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<p>This document is a working draft, produced as part of the |
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<a href="http://suika.fam.cx/www/markup/html/whatpm/readme">Whatpm</a> |
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subproject |
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of the <a href="http://suika.fam.cx/www/manakai-core/doc/web/">manakai</a> |
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project. It might be updated, replaced, or obsoleted by |
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other documents at any time. It is inappropriate to |
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cite this document as other than <q>work in progress</q>.</p> |
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|
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<p>Comments on this document are welcome and |
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may be sent to the <a href="#author">author</a>.</p> |
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|
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<p>Translations of thie document might be available. |
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The English version of the document is the only |
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normative version.</p> |
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</div> |
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|
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<div id="introduction" class="section"> |
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<h2>Introduction</h2> |
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|
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<p class=section-info>This section is <em>non$B!>(Bnormative</em>.</p> |
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|
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<p>Selectors |
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<cite class="bibref normative">[<a href="#ref-SELECTORS">SELECTORS</a>]</cite> |
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are patterns that match against elements |
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in a tree structure and are used in Web technologies, including |
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<a href="http://www.w3.org/TR/CSS21"><abbr title="Cascading Style Sheets">CSS</abbr></a> |
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<cite class="bibref informative">[<a href="#ref-CSS">CSS</a>]</cite>, |
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<a href="http://whatwg.org/html5"><abbr title="Hypertext Markup Language">HTML</abbr>5</a> |
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<cite class="bibref informative">[<a href="#ref-HTML5">HTML5</a>]</cite>, |
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<a href="http://www.mozilla.org/projects/xbl/xbl2.html"><abbr title="XML Binding Language">XBL</abbr>2</a> |
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<cite class="bibref informative">[<a href="#ref-XBL2">XBL2</a>]</cite>, and |
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<a href="http://dev.w3.org/cvsweb/~checkout~/2006/webapi/selectors-api/Overview.html?rev=1.28&content-type=text/html;%20charset=utf-8">Selectors |
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<abbr>API</abbr></a> |
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<cite class="bibref informative">[<a href="#ref-SAPI">SAPI</a>]</cite>.</p> |
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|
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<p>It is so flexible language that a conceptually same pattern |
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can be represented in inifnite numbers of instances of selectors. |
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It might be convinient for e.g. validation of a test result to |
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define a subset of the language, in which no semantically equivalent |
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selectors are contained.</p> |
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|
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<p><a href="http://dev.w3.org/cvsweb/csswg/cssom/Overview.html">The |
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<abbr title="Cascading Style Sheets Object Model">CSSOM</abbr> |
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specification</a> |
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<cite class="bibref informative">[<a href="#ref-CSSOM">CSSOM</a>]</cite> |
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is trying to define an algorithm to |
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<a href="http://dev.w3.org/cvsweb/~checkout~/csswg/cssom/Overview.html?rev=1.55&content-type=text/html;%20charset=utf-8#serializing0">serialize |
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a group of selectors</a> for the purpose of <code>selectorText</code> |
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attribute. However, the algorithm is incomplete |
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<time datetime=2007-09-25>at the time of the writing</time>. |
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Note that current Web browser implementations |
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of the <code>selectorText</code> attribute are consistently broken |
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in not escaping unsafe identifiers and therefore it is not wise |
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to deploy that format for testing.</p> |
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|
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</div> |
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|
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<div class="section" id="terminology"> |
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<h2>Terminology</h2> |
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|
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<p>The key words <q><dfn id=must><em class="rfc2119">MUST</em></dfn></q>, |
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<q><dfn id=must-not><em class="rfc2119">MUST NOT</em></dfn></q>, |
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<q><dfn id=should><em class="rfc2119">SHOULD</em></dfn></q>, |
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<q><dfn id=should-not><em class="rfc2119">SHOULD NOT</em></dfn></q>, and |
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<q><dfn id=may><em class=rfc2119>MAY</em></dfn></q> in this |
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document are to be interpreted as described in |
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<a href="urn:ietf:rfc:2119"><abbr title="Request for Comments">RFC</abbr> |
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2119</a> |
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<cite class="bibref normative">[<a href="#ref-KEYWORDS">KEYWORDS</a>]</cite>.</p> |
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|
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<p>Requirements phrased in the imperative as part of algorithms are to be |
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interpreted with the meaning of the key word (<em class=rfc2119>MUST</em>) |
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used in introducing the algorithm.</p> |
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|
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<p>Conformance requirements phrased as algorithms or specific steps |
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<em class=rfc2119>MAY</em> be implemented in any manner, so long as the end |
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result is equivalent.</p> |
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|
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<!-- Strictly speaking the paragraph below is not part of terminology. --> |
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<p>All examples and notes in this specification are non$B!>(Bnormative, |
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as are all sections explicitly marked non$B!>(Bnormative. Everything |
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else in this specification is normative.</p> |
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|
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<p>For the purpose of this specification, pseudo$B!>(Belements are also |
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referred to as <dfn title="simple selector" id=simple-selector>simple |
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selectors</dfn> and are considered as part of the last sequence of |
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simple selector in a selector.</p> |
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</div> |
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|
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<div class="section" id="serializing"> |
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<h2>Serializing Selectors in |
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<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
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Representation</h2> |
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|
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<p>Subsections of this section define algorithms |
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to <a href="#algorithm-serialize-a-simple-selector">serialize a simple |
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selector</a> or <a href="#algorithm-serialize-a-group-of-selectors">serialize |
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a group of selectors</a>.</p> |
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|
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<div class="issue ed"> |
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<p><a href="http://suika.fam.cx/gate/cvs/*checkout*/markup/html/whatpm/Whatpm/CSS/SelectorsSerializer.pm">See |
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also the reference implementation</a> for now.</p> |
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</div> |
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|
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<div class="note memo"> |
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<p>The serialized representation will not contain any comment.</p> |
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</div> |
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<!-- TODO: link terms to Selectors --> |
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|
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<div class=section id=serializing-tokens> |
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<h3>Serializing Tokens</h3> |
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|
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<p>To <dfn id=algorithm-normalize-an-ident title="normalize a string as an IDENT">normalize |
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a string (<dfn id=var-n><var>n</var></dfn>) as an <code>IDENT</code></dfn>, |
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the following algorithm <em class=rfc2119>MUST</em> be used:</p> |
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<ol> |
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<li>If <var>n</var> is either an <code>IDENT</code> or a <code>HASH</code>, |
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replace the escape sequences (<code>\</code> and following characters) in |
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<var>n</var> by characters represented by them respectively.</li> |
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<li>If <var>n</var> is a <code>HASH</code>, remove the leading |
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<code class=char>U+0023</code> <code class=charname>NUMBER SIGN</code> |
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(<code class=char>#</code>) character from <var>n</var>.</li> |
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<li>If there is any character that is <em>not</em> one of |
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<code class=char>U+002D</code> <code class=charname>HYPHEN-MINUS</code> |
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(<code class=char>-</code>), <code class=char>U+0030</code> |
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<code class=charname>DIGIT ZERO</code> |
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(<code class=char>0</code>) to <code class=char>U+0039</code> |
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<code class=charname>DIGIT NINE</code> (<code class=char>9</code>), |
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<code class=char>U+0041</code> <code class=charname>LATIN CAPITAL LETTER |
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A</code> (<code class=char>A</code>) to <code class=char>U+005A</code> |
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<code class=charname>LATIN CAPITAL LETTER Z</code> (<code class=char>Z</code>), |
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<code class=char>U+005F</code> <code class=charname>LOW LINE</code> |
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(<code class=char>_</code>), <code class=char>U+0061</code> |
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<code class=charname>LATIN SMALL LETTER A</code> |
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(<code class=char>a</code>) to <code class=char>U+006A</code> |
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<code class=charname>LATIN SMALL LETTER Z</code> (<code class=char>z</code>), |
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<code class=char>U+0080</code> to <code class=char>U+D7FF</code>, or |
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<code class=char>U+E000</code> to <code class=char>U+10FFFF</code> in |
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<var>n</var>, then replace it by string <code>\<var>HHHHHH</var></code>, where |
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<dfn id=var-HHHHHH><var>HHHHHH</var></dfn> is the upper$B!>(Bcase zero$B!>(Bpadded |
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hexadecimal representation of the character. If the character |
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is outside the range of <code>[<code class=char>U+0000</code>, |
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<code class=char>U+10FFFF</code>]</code>, <var>HHHHHH</var> |
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<em class=rfc2119>MUST</em> be <code>FFFFFF</code>.</li> |
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<li>If the first character in <var>n</var> is one of |
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<code class=char>U+0030</code> <code class=charname>DIGIT ZERO</code> |
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(<code class=char>0</code>) to <code class=char>U+0039</code> |
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<code class=charname>DIGIT NINE</code> (<code class=char>9</code>), |
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then prepend a string <code>\00003</code> at the beginning of |
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<var>n</var>.</li> |
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<li>If the first character in <var>n</var> is <code class=char>U+002D</code> |
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<code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>) and |
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the second character, if any, is <em>not</em> one of |
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<code class=char>U+0041</code> <code class=charname>LATIN CAPITAL LETTER |
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A</code> (<code class=char>A</code>) to <code class=char>U+005A</code> |
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<code class=charname>LATIN CAPITAL LETTER Z</code> (<code class=char>Z</code>), |
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<code class=char>U+005F</code> <code class=charname>LOW LINE</code> |
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(<code class=char>_</code>), <code class=char>U+0061</code> |
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<code class=charname>LATIN SMALL LETTER A</code> |
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(<code class=char>a</code>) to <code class=char>U+006A</code> |
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<code class=charname>LATIN SMALL LETTER Z</code> (<code class=char>z</code>), |
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<code>U+0080</code> to <code>U+D7FF</code>, or |
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<code>U+E000</code> to <code>U+10FFFF</code>, or |
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<var>n</var> is equal to <code class=char>U+002D</code> |
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<code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>), then |
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replace the <code class=char>U+002D</code> |
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<code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>) |
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character by string <code>\00002D</code>.</li> |
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<li>Then, <var>n</var> is the result of the algorithm.</li> |
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</ol> |
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|
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<p>To <dfn id=algorithm-normalize-a-string title="normalize a string (STRING or IDENT) as a STRING">normalize |
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a string (<dfn id=var-s><var>s</var></dfn>) as a <code>STRING</code></dfn>, |
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the following algorithm <em class=rfc2119>MUST</em> be used:</p> |
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<ol> |
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<li>If <var>s</var> is either an <code>IDENT</code> or a |
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<code>STRING</code>, replace the escape sequences (<code>\</code> and |
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following characters) in <var>s</var> by characters represented by them |
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(or an empty string if <code>\</code> is immediately followed by |
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newline character(s)) respectively.</li> |
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<li>If <var>s</var> is a <code>STRING</code>, remove the quotation marks |
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enclosing <var>s</var>.</li> |
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<li><p>If there is any character that is <em>not</em> one of |
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<code class=char>U+0020</code> <code class=charname>SPACE</code>, |
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<code class=char>U+0021</code> <code class=charname>EXCLAMATION MARK</code> |
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(<code class=char>!</code>), <code class=char>U+0023</code> |
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<code class=charname>NUMBER SIGN</code> (<code class=char>#</code>) to |
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<code class=char>U+005B</code> <code class=charname>LEFT SQUARE |
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BRACKET</code>, <code class=char>U+005D</code> <code class=charname>RIGHT |
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SQUARE BRACKET</code> to <code class=char>U+D7FF</code>, or |
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<code class=char>U+E000</code> to <code class=char>U+10FFFF</code> in |
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<var>s</var>, then replace it by string <code>\<var>HHHHHH</var></code>, where |
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<dfn id=var-HHHHHH><var>HHHHHH</var></dfn> is the upper$B!>(Bcase zero$B!>(Bpadded |
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hexadecimal representation of the character. If the character |
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is outside the range of <code>[<code class=char>U+0000</code>, |
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<code class=char>U+10FFFF</code>]</code>, <var>HHHHHH</var> |
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<em class=rfc2119>MUST</em> be <code>FFFFFF</code>.</p></li> |
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<li><p>Insert a <code class=char>U+0022</code> <code class=charname>QUOTATION |
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MARK</code> (<code class=char>"</code>) at the beginning of |
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<var>s</var>.</p></li> |
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<li><p>Insert a <code class=char>U+0022</code> <code class=charname>QUOTATION |
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MARK</code> (<code class=char>"</code>) at the end of <var>s</var>.</p></li> |
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<li><p>Then, <var>s</var> is the result of the algorithm.</p></li> |
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</ol> |
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|
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<p>A <dfn id=newline title=newline>newline</dfn> |
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<em class=rfc2119>SHOULD</em> be represented as a |
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<code class=char>U+000A</code> <code class=charname>LINE FEED</code> |
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character. However, depending on the context where |
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the <abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
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representation is in use, a sequence of |
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<code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code> |
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followed by a <code class=char>U+000A</code> |
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<code class=charname>LINE FEED</code> (i.e. a |
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<code>CRLF</code> sequence) or a character |
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<code class=char>U+000D</code> <code class=charname>CARRIAGE RETURN</code> |
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<em class=rfc2119>MAY</em> be used as a <a href="#newline">newline</a> instead. |
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<a href="#newline">Newline</a> representations |
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<em class=rfc2119>SHOULD</em> be consistent in an |
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<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
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representation.</p> |
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|
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<div class="note memo"> |
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<p>Therefore, newlines must be normalized before |
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<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
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representations are literally compared.</p> |
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</div> |
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|
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<div class="issue ed"> |
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<p>Need to define <dfn id=lower-case>lower$B!>(Bcase</dfn>. |
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It is tr/A-Z/a-z/ for now.</p> |
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</div> |
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|
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</div> |
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|
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|
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<div class=section id=serializing-simple-selectors> |
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<h3>Serializing Simple Selectors</h3> |
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|
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<p>No <abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
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representation is defined for an invalid <a href="#simple-selector">simple |
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selector</a>.</p> |
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|
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<p>To |
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<dfn id=algorithm-serialize-a-simple-selector title="serialize a simple selector">serialize |
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a simple selector (<dfn><var id=var-ss>ss</var></dfn>)</dfn>, |
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the following algorithm <em class=rfc2119>MUST</em> be used:</p> |
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<ol> |
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<li>Let <dfn id=var-r><var>r</var></dfn> an empty string.</li> |
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<li>Process <var>ss</var> as following: |
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|
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<dl class=switch> |
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<dt>If <var>ss</var> is a type or universal selector</dt> |
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<dd> |
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<ol> |
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<li>Append a namespace prefix as following: |
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|
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<dl class=switch> |
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<dt>If a namespace URI is specified (via namespace prefix, or |
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by omitting namespace prefix where a default namespace is specified)</dt> |
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<dd>Append the namespace URI as a |
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<a href="#algorithm-normalize-an-ident" title="normalize a string as an IDENT">normalized |
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<code>IDENT</code></a> to <var>r</var>. Then, append a |
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<code class=char>U+007C</code> |
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<code class=charname>VERTICAL BAR</code> (<code class=char>|</code>) |
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character to <var>r</var>.</dd> |
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<dt>If the null namespace is specified (by zero$B!>(Blength namespace |
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prefix)</dt> |
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<dd>Append a <code class=char>U+007C</code> |
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<code class=charname>VERTICAL BAR</code> (<code class=char>|</code>) |
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character to <var>r</var>.</dd> |
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<dt>If no namespace is specified (by namespace prefix <code>*</code>, |
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or by omitting namespace prefix where no default namespace is |
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specified)</dt> |
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<dd>Append a <code class=char>U+002A</code> |
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<code class=charname>ASTERISK</code> (<code class=char>*</code>) |
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character, followed by a <code class=char>U+007C</code> |
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<code class=charname>VERTICAL BAR</code> (<code class=char>|</code>) |
| 344 |
character, to <var>r</var>.</dd> |
| 345 |
</dl> |
| 346 |
</li> |
| 347 |
<li>If <var>ss</var> is a type selector, append the |
| 348 |
<a href="#algorithm-normalize-an-ident" title="normalize a string (IDENT) an IDENT">normalized</a> |
| 349 |
local name to <var>r</var>.</li> |
| 350 |
<li>If <var>ss</var> is a universal selector, append |
| 351 |
a <code class=char>U+002A</code> <code class=charname>ASTERISK</code> |
| 352 |
(<code class=char>*</code>) character to <var>r</var>.</li> |
| 353 |
</ol> |
| 354 |
</dd> |
| 355 |
<dt>If <var>ss</var> is an attribute selector</dt> |
| 356 |
<dd> |
| 357 |
<ol> |
| 358 |
<li>Append a <code class=char>U+005B</code> <code class=charname>LEFT |
| 359 |
SQUARE BRACKET</code> (<code class=char>[</code>) to |
| 360 |
<var>r</var>.</li> |
| 361 |
<li> |
| 362 |
Append a namespace prefix as following: |
| 363 |
<dl> |
| 364 |
<dt>If a namespace URI is specified</dt> |
| 365 |
<dd>Append the namespace URI as a |
| 366 |
<a href="#algorithm-normalize-an-ident" title="normalize a string as an IDENT">normalized |
| 367 |
<code>IDENT</code></a> to <var>r</var>. Then, append a |
| 368 |
<code class=char>U+007C</code> |
| 369 |
<code class=charname>VERTICAL BAR</code> (<code class=char>|</code>) |
| 370 |
character to <var>r</var>.</dd> |
| 371 |
<dt>If the null namespace is specified</dt> |
| 372 |
<dd>Append a <code class=char>U+007C</code> |
| 373 |
<code class=charname>VERTICAL BAR</code> character to |
| 374 |
<var>r</var>.</dd> |
| 375 |
<dt>If no namespace is specified</dt> |
| 376 |
<dd>Append a <code class=char>U+002A</code> |
| 377 |
<code class=charname>ASTERISK</code> (<code class=char>*</code>) |
| 378 |
character, followed by a <code class=char>U+007C</code> |
| 379 |
<code class=charname>VERTICAL BAR</code> (<code class=char>|</code>) |
| 380 |
character, to <var>r</var>.</dd> |
| 381 |
</dl> |
| 382 |
</li> |
| 383 |
<li>Append the |
| 384 |
<a href="#algorithm-normalize-an-ident" title="normalize a string (IDENT) as an IDENT">normalized</a> |
| 385 |
local name to <var>r</var>.</li> |
| 386 |
<li>If a value is specified in <var>ss</var>: |
| 387 |
<ol> |
| 388 |
<li>Depending on the way to match, append <code>=</code>, |
| 389 |
<code>~=</code>, <code>|=</code>, <code>^=</code>, |
| 390 |
<code>$=</code>, or <code>*=</code> to <var>r</var>.</li> |
| 391 |
<li>Append the |
| 392 |
<a href="#algorithm-normalize-a-string" title="normalize a string">normalized</a> |
| 393 |
value to <var>r</var>.</li> |
| 394 |
</ol> |
| 395 |
</li> |
| 396 |
<li>Append a <code class=char>U+005D</code> <code class=charname>RIGHT |
| 397 |
SQUARE BRACKET</code> (<code class=char>]</code>) to |
| 398 |
<var>r</var>.</li> |
| 399 |
</ol> |
| 400 |
</dd> |
| 401 |
<dt>If <var>ss</var> is a class selector</dt> |
| 402 |
<dd>Append a <code class=char>U+002E</code> <code class=charname>FULL |
| 403 |
STOP</code> (<code class=char>.</code>) character, followed |
| 404 |
by <a href="#algorithm-normalize-an-ident" title="normalize a string (IDENT) as an IDENT">normalized</a> |
| 405 |
class name, to <var>r</var>.</dd> |
| 406 |
<dt>If <var>ss</var> is an <abbr>ID</abbr> selector</dt> |
| 407 |
<dd>Append a <code class=char>U+0023</code> <code class=charname>NUMBER |
| 408 |
SIGN</code> (<code class=char>#</code>) character, followed |
| 409 |
by <a href="#algorithm-normalize-an-ident" title="normalize a string (HASH except for the leading #) as an IDENT">normalized</a> |
| 410 |
<abbr>ID</abbr>, to <var>r</var>.</dd> |
| 411 |
<dt>If <var>ss</var> is a pseudo$B!>(Bclass selector</dt> |
| 412 |
<dd> |
| 413 |
<ol> |
| 414 |
<li>Append a <code class=char>U+003A</code> |
| 415 |
<code class=charname>COLON</code> (<code class=char>:</code>) character |
| 416 |
to <var>r</var>.</li> |
| 417 |
<li>Append the |
| 418 |
<a href="#algorithm-normalize-an-ident" title="normalize a string (IDENT) as an IDENT">normalized</a> |
| 419 |
name (in <a href="#lower-case">lower$B!>(Bcase</a>) of the pseudo$B!>(Bclass to |
| 420 |
<var>r</var>.</li> |
| 421 |
<li>Append any arguments as following: |
| 422 |
<dl class=switch> |
| 423 |
<dt>If the name of the pseudo$B!>(Bclass is <code>lang</code></dt> |
| 424 |
<dd> |
| 425 |
<ol> |
| 426 |
<li>Append a <code class=char>U+0028</code> <code class=charname>LEFT |
| 427 |
PARENTHESIS</code> (<code class=char>(</code>) character |
| 428 |
to <var>r</var>.</li> |
| 429 |
<li>Append the |
| 430 |
<a href="#algorithm-normalize-an-ident" title="normalize a string (IDENT) as an IDENT">normalized</a> |
| 431 |
language tag (the argument) to <var>r</var>. |
| 432 |
<span class="issue ed">Should we normalize cases?</span></li> |
| 433 |
<li>Append a <code class=char>U+0029</code> |
| 434 |
<code class=charname>RIGHT PARENTHESIS</code> |
| 435 |
(<code class=char>)</code>) character |
| 436 |
to <var>r</var>.</li> |
| 437 |
</ol> |
| 438 |
</dd> |
| 439 |
<dt>If the name of the pseudo$B!>(Bclass is |
| 440 |
<code>-manakai-contains</code></dt> |
| 441 |
<dd> |
| 442 |
<ol> |
| 443 |
<li>Append a <code class=char>U+0028</code> <code class=charname>LEFT |
| 444 |
PARENTHESIS</code> (<code class=char>(</code>) character |
| 445 |
to <var>r</var>.</li> |
| 446 |
<li>Append the |
| 447 |
<a href="#algorithm-normalize-a-string" title="normalize a string">normalized</a> |
| 448 |
string (the argument) to <var>r</var>.</li> |
| 449 |
<li>Append a <code class=char>U+0029</code> |
| 450 |
<code class=charname>RIGHT PARENTHESIS</code> |
| 451 |
(<code class=char>)</code>) character |
| 452 |
to <var>r</var>.</li> |
| 453 |
</ol> |
| 454 |
</dd> |
| 455 |
<dt>If name of the pseudo$B!>(Bclass is either <code>nth-child</code>, |
| 456 |
<code>nth-last-child</code>, <code>nth-of-type</code>, or |
| 457 |
<code>nth-last-of-type</code></dt> |
| 458 |
<dd> |
| 459 |
<ol> |
| 460 |
<li>Append a <code class=char>U+0028</code> <code class=charname>LEFT |
| 461 |
PARENTHESIS</code> (<code class=char>(</code>) character |
| 462 |
to <var>r</var>.</li> |
| 463 |
<li>Append <span class=ed>@@ normalized</span> |
| 464 |
integer <var>a</var> to <var>r</var>. |
| 465 |
If the argument is a keyword <code>odd</code> or <code>even</code>, |
| 466 |
<var>a</var> is <code>2</code>. If <var>a</var> and |
| 467 |
<code>n</code> is omitted, <var>a</var> is assumed as |
| 468 |
<code>0</code>. Otherwise, if <var>a</var> is omitted, |
| 469 |
it is assumed as <code>1</code> (or <code>-1</code>, |
| 470 |
if there is a <code class=char>U+002D</code> |
| 471 |
<code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>) |
| 472 |
character).</li> |
| 473 |
<li>Append a <code class=char>U+006E</code> |
| 474 |
<code class=charname>LATIN SMALL LETTER N</code> |
| 475 |
(<code class=char>n</code>) character to <var>r</var>.</li> |
| 476 |
<li>Append <span class=ed>@@ normalized</span> |
| 477 |
integer <var>b</var> to <var>r</var>. |
| 478 |
It <em class=rfc2119>MUST</em> be preceded by a sign, |
| 479 |
either <code class=char>U+002B</code> <code class=charname>PLUS |
| 480 |
SIGN</code> (<code class=char>+</code>) or |
| 481 |
<code class=char>U+002D</code> |
| 482 |
<code class=charname>HYPHEN-MINUS</code> (<code class=char>-</code>) |
| 483 |
character. If the argument is a keyword <code>odd</code>, |
| 484 |
<var>b</var> is <code>1</code>. If the argument |
| 485 |
is a keyword <code>even</code>, <var>b</var> is |
| 486 |
<code>0</code>. If <var>b</var> is omitted, it is assumed as |
| 487 |
<code>0</code>. The sign of <code>0</code> |
| 488 |
<em class=rfc2119>MUST</em> be <code class=char>U+002B</code> |
| 489 |
<code class=charname>PLUS SIGN</code> |
| 490 |
(<code class=char>+</code>).</li> |
| 491 |
<li>Append a <code class=char>U+0029</code> |
| 492 |
<code class=charname>RIGHT PARENTHESIS</code> |
| 493 |
(<code class=char>)</code>) character |
| 494 |
to <var>r</var>.</li> |
| 495 |
</ol> |
| 496 |
</dd> |
| 497 |
<dt>If the name of the pseudo$B!>(Bclass is <code>not</code></dt> |
| 498 |
<dd> |
| 499 |
<ol> |
| 500 |
<li>Append a string of <code class=char>U+003A</code> |
| 501 |
<code class=charname>COLON</code>, <code class=char>U+006E</code> |
| 502 |
<code class=charname>LATIN SMALL LETTER N</code>, |
| 503 |
<code class=char>U+006F</code> <code class=charname>LATIN |
| 504 |
SMALL LETTER O</code>, <code class=char>U+0074</code> |
| 505 |
<code class=charname>LATIN SMALL LETTER T</code>, and |
| 506 |
<code class=char>U+0028</code> <code class=charname>LEFT |
| 507 |
PARENTHESIS</code> (<code>:not(</code>), followed by a |
| 508 |
<a href="#newline">newline</a>, to <var>r</var>.</li> |
| 509 |
<li>Append four <code class=char>U+0020</code> |
| 510 |
<code class=charname>SPACE</code> characters to |
| 511 |
<var>r</var>.</li> |
| 512 |
<li>Append four <code class=char>U+0020</code> |
| 513 |
<code class=charname>SPACE</code> characters to |
| 514 |
<var>r</var> again.</li> |
| 515 |
<li><a href="#algorithm-serialize-a-simple-selector">Serialize |
| 516 |
the simple selector specified as the argument to the |
| 517 |
<code>not</code> pseudo$B!>(Bclass</a>.</li> |
| 518 |
<li>Append a <a href="#newline">newline</a> to |
| 519 |
<var>r</var>.</li> |
| 520 |
<li>Append four <code class=char>U+0020</code> |
| 521 |
<code class=charname>SPACE</code> characters to |
| 522 |
<var>r</var>.</li> |
| 523 |
<li>Append a <code class=char>U+0029</code> |
| 524 |
<code class=charname>RIGHT PARENTHESIS</code> |
| 525 |
(<code class=char>)</code>) character |
| 526 |
to <var>r</var>.</li> |
| 527 |
</ol> |
| 528 |
</dd> |
| 529 |
<dt>Otherwise</dt> |
| 530 |
<dd>The pseudo$B!>(Bclass is not supported by this version of |
| 531 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 532 |
and therefore no |
| 533 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 534 |
representation is defined for <var>ss</var>. Stop the algorithm.</dd> |
| 535 |
</dl> |
| 536 |
</li> |
| 537 |
</ol> |
| 538 |
</dd> |
| 539 |
<dt>If <var>ss</var> is a pseudo$B!>(Belement</dt> |
| 540 |
<dd> |
| 541 |
<ol> |
| 542 |
<li>Append two <code class=char>U+003A</code> |
| 543 |
<code class=charname>COLON</code> characters (<code>::</code>) |
| 544 |
to <var>r</var>.</li> |
| 545 |
<li>Append the |
| 546 |
<a href="#algorithm-normalize-an-ident" title="normalize a string (IDENT) as an IDENT">normalized</a> |
| 547 |
name (in <a href="#lower-case">lower$B!>(Bcase</a>) of the pseudo$B!>(Belement |
| 548 |
to <var>r</var>.</li> |
| 549 |
<li>If the pseudo$B!>(Belement has any arguments: |
| 550 |
The pseudo$B!>(Belement is not supported by this version of |
| 551 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 552 |
and therefore no |
| 553 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 554 |
representation is defined for <var>ss</var>. Stop the algorithm. |
| 555 |
</li> |
| 556 |
</ol> |
| 557 |
</dd> |
| 558 |
</dl> |
| 559 |
</li> |
| 560 |
<li>Then, <var>r</var> is the |
| 561 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 562 |
representation of <var>ss</var>.</li> |
| 563 |
</ol> |
| 564 |
|
| 565 |
</div> |
| 566 |
|
| 567 |
<div class=section id=serializing-groups-of-selectors> |
| 568 |
<h3>Serializing Groups of Selectors</h3> |
| 569 |
|
| 570 |
<p>No <abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 571 |
representation is defined for an invalid |
| 572 |
<a href="http://www.w3.org/TR/css3-selectors/#grouping">group of |
| 573 |
selectors</a>.</p> |
| 574 |
|
| 575 |
<p>To |
| 576 |
<dfn id=algorithm-serialize-a-group-of-selectors title="serialize a group of selectors">serialize |
| 577 |
a group of selectors (<dfn id=var-gs><var>gs</var></dfn>)</dfn>, |
| 578 |
the following algorithm <em class=rfc2119>MUST</em> be used:</p> |
| 579 |
<ol> |
| 580 |
<li>Let <dfn id=var-result><var>result</var></dfn> an empty string.</li> |
| 581 |
<li>For each selector (<dfn id=var-selector><var>selector</var></dfn>) in |
| 582 |
<var>gs</var>: |
| 583 |
<ol> |
| 584 |
<li>If <var>selector</var> is <em>not</em> the first selector |
| 585 |
in the <var>gs</var>, then append a <code class=char>U+002C</code> |
| 586 |
<code class=charname>COMMA</code> (<code class=char>,</code>) followed by a |
| 587 |
<a href="#newline">newline</a> to <var>result</var>.</li> |
| 588 |
<li>Append four <code class=char>U+0020</code> |
| 589 |
<code class=charname>SPACE</code> characters to <var>result</var>.</li> |
| 590 |
<li>Process each sequence of simple selectors or |
| 591 |
combinator in <var>selector</var> as following: |
| 592 |
<dl class=switch> |
| 593 |
<dt>If it is a sequence of simle selector |
| 594 |
(<dfn id=var-sss><var>sss</var></dfn>)</dt> |
| 595 |
<dd> |
| 596 |
<ol> |
| 597 |
<li class=ed><a href="#algorithm-serialize-a-simple-selector">Serialize |
| 598 |
each simple selector</a> in <var>sss</var>.</li> |
| 599 |
<li class=ed>sort</li> |
| 600 |
<li>Append a <a href="#newline">newline</a> to <var>result</var>.</li> |
| 601 |
</ol> |
| 602 |
</dd> |
| 603 |
<dt>If it is a combinator (<dfn id=var-c><var>c</var></dfn>)</dt> |
| 604 |
<dd> |
| 605 |
<ol> |
| 606 |
<li>Append two <code class=char>U+0020</code> |
| 607 |
<code class=charname>SPACE</code> characters to <var>result</var>.</li> |
| 608 |
<li>Process <var>c</var> as following: |
| 609 |
|
| 610 |
<dl class=switch> |
| 611 |
<dt>If <var>c</var> is descendant combinator (white space)</dt> |
| 612 |
<dd>Append a <code class=char>U+0020</code> |
| 613 |
<code class=charname>SPACE</code> character to |
| 614 |
<var>result</var>.</dd> |
| 615 |
<dt>If <var>c</var> is child combinator |
| 616 |
(<code class=char>></code>)</dt> |
| 617 |
<dd>Append a <code class=char>U+003E</code> |
| 618 |
<code class=charname>GREATER-THAN SIGN</code> |
| 619 |
(<code class=char>></code>) character to <var>result</var>.</dd> |
| 620 |
<dt>If <var>c</var> is adjacent sibling combinator |
| 621 |
(<code class=char>+</code>)</dt> |
| 622 |
<dd>Append a <code class=char>U+002B</code> |
| 623 |
<code class=charname>PLUS SIGN</code> (<code class=char>+</code>) |
| 624 |
character to <var>result</var>.</dd> |
| 625 |
<dt>If <var>c</var> is general sibling combinator |
| 626 |
(<code class=char>~</code>)</dt> |
| 627 |
<dd>Append a <code class=char>U+007E</code> |
| 628 |
<code class=charname>TILDE</code> (<code class=char>~</code>) |
| 629 |
character to <var>result</var>.</dd> |
| 630 |
</dl> |
| 631 |
</li> |
| 632 |
<li>Append a <code class=char>U+0020</code> |
| 633 |
<code class=charname>SPACE</code> character to |
| 634 |
<var>result</var>.</li> |
| 635 |
</ol> |
| 636 |
</dd> |
| 637 |
</dl> |
| 638 |
</ol> |
| 639 |
</li> |
| 640 |
<li>Then, <var>result</var> is the |
| 641 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 642 |
representation of <var>gs</var>.</li> |
| 643 |
</ol> |
| 644 |
|
| 645 |
</div> |
| 646 |
|
| 647 |
</div> |
| 648 |
|
| 649 |
<div class="section" id="parsing"> |
| 650 |
<h2>Parsing |
| 651 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 652 |
Representations of Selectors</h2> |
| 653 |
|
| 654 |
<p>Since <a href="#algorithm-serialize-a-group-of-selectors">the serializing |
| 655 |
algorithm for groups of selectors</a> is so designed that it always outputs a |
| 656 |
valid <a href="http://www.w3.org/TR/css3-selectors/#grouping">group of |
| 657 |
selectors</a>, no special parser for the |
| 658 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 659 |
representation is necessary. Any conforming parser for |
| 660 |
<a href="http://www.w3.org/TR/css3-selectors/#grouping">groups of |
| 661 |
selectors</a> <em class=rfc2119>MAY</em> be used |
| 662 |
to parse <abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 663 |
representations of |
| 664 |
<a href="http://www.w3.org/TR/css3-selectors/#grouping">groups of |
| 665 |
selectors</a>.</p> |
| 666 |
|
| 667 |
<p>Likewise, <a href="#algorithm-serialize-a-simple-selector">the serializing |
| 668 |
algorithm for simple selectors</a> always outputs a valid |
| 669 |
<a href="#simple-selector">simple selector</a> and therefore any |
| 670 |
conforming parser for <a href="#simple-selector">simple selector</a> |
| 671 |
<em class=rfc2119>MAY</em> be used to parse |
| 672 |
<abbr title="Selectors Serialization Format for Testing">SSFT</abbr> |
| 673 |
representations of <a href="#simple-selector">simple selectors</a>.</p> |
| 674 |
</div> |
| 675 |
|
| 676 |
<div class="section" id="examples"> |
| 677 |
<h2>Examples</h2> |
| 678 |
|
| 679 |
<p class=section-info>This section is <em>non$B!>(Bnormative</em>.</p> |
| 680 |
|
| 681 |
<div class="ed issue"> |
| 682 |
<p><a href="http://suika.fam.cx/gate/2007/css/parser-interface">Try demo</a>, |
| 683 |
by choosing <q>Selectors</q> radio button.</p> |
| 684 |
|
| 685 |
<div class="example figure block"> |
| 686 |
<div class="caption">...</div> |
| 687 |
|
| 688 |
<pre><code>...</code></pre> |
| 689 |
</div> |
| 690 |
|
| 691 |
</div> |
| 692 |
|
| 693 |
</div> |
| 694 |
|
| 695 |
<div id="references" class="section reference"> |
| 696 |
<h2>References</h2> |
| 697 |
|
| 698 |
<div id="normative-references" class="section normative reference"> |
| 699 |
<h3>Normative References</h3> |
| 700 |
|
| 701 |
<dl> |
| 702 |
<dt id="ref-KEYWORDS">KEYWORDS</dt> |
| 703 |
<dd><cite><a href="urn:ietf:rfc:2119">Key words for use in |
| 704 |
<abbr>RFCs</abbr> to Indicate Requirement Levels</a></cite>, |
| 705 |
<abbr title="Internet Engineering Task Force">IETF</abbr> |
| 706 |
<a href="urn:ietf:bcp:14"><abbr title="Best Current Practice">BCP</abbr> |
| 707 |
14</a>, <abbr title="Request for Comments">RFC</abbr> 2119, |
| 708 |
<time datetime=1997-03>March 1997</time>. |
| 709 |
This version of the specification is referenced.</dd> |
| 710 |
<dt id=ref-SELECTORS>SELECTORS</dt> |
| 711 |
<dd><a href="http://www.w3.org/TR/2005/WD-css3-selectors-20051215"><cite>Selectors</cite></a>, |
| 712 |
<abbr title="World Wide Web Consortium">W3C</abbr> Working Draft, |
| 713 |
<time datetime=2005-12-15>15 December 2005</time>. Work in progress. |
| 714 |
<a href="http://www.w3.org/TR/css3-selectors">The latest version</a> |
| 715 |
of the specification is referenced.</dd> |
| 716 |
</dl> |
| 717 |
</div> |
| 718 |
|
| 719 |
<div id="informative-references" class="section informative reference"> |
| 720 |
<h3>Non$B!>(Bnormative References</h3> |
| 721 |
|
| 722 |
<dl> |
| 723 |
<dt id=ref-CSS>CSS</dt> |
| 724 |
<dd><cite><a href="http://www.w3.org/TR/2007/CR-CSS21-20070719">Cascading |
| 725 |
Style Sheets Level 2 Revision 1 (<abbr>CSS</abbr> 2.1) |
| 726 |
Specification</a></cite>, |
| 727 |
<abbr title="World Wide Web Consortium">W3C</abbr> Candidate |
| 728 |
Recommendation, <time datetime=2007-07-19>19 July 2007</time>. |
| 729 |
Work in progress. The latest version of the specification is |
| 730 |
available at |
| 731 |
<code class=URI><<a href="http://www.w3.org/TR/CSS21">http://www.w3.org/TR/CSS21</a>></code>.</dd> |
| 732 |
<dt id=ref-CSSOM>CSSOM</dt> |
| 733 |
<dd><cite><a href="http://dev.w3.org/cvsweb/~checkout~/csswg/cssom/Overview.html?rev=1.55&content-type=text/html;%20charset=utf-8">Cascading |
| 734 |
Style Sheets Object Model (<abbr>CSSOM</abbr>)</a></cite>, |
| 735 |
<abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft, |
| 736 |
<time datetime=2007-06-18>18 June 2007</time>. Work in progress. |
| 737 |
The latest Editor's Draft of the specification is available at |
| 738 |
<code class=URI><<a href="http://dev.w3.org/csswg/cssom/Overview.html">http://dev.w3.org/csswg/cssom/Overview.html</a>></code>.</dd> |
| 739 |
<dt id=ref-HTML5>HTML5</dt> |
| 740 |
<dd><cite><a href="http://whatwg.org/html5"><abbr>HTML</abbr> 5</a></cite>, |
| 741 |
<abbr title="Web Hypertext Application Technology Working Group">WHATWG</abbr> |
| 742 |
Working Draft. Work in progress.</dd> |
| 743 |
<dt id=ref-SAPI>SAPI</dt> |
| 744 |
<dd><cite><a href="http://dev.w3.org/cvsweb/~checkout~/2006/webapi/selectors-api/Overview.html?rev=1.28&content-type=text/html;%20charset=utf-8">Selectors <abbr>API</abbr></a></cite>, |
| 745 |
<abbr title="World Wide Web Consortium">W3C</abbr> Editor's Draft, |
| 746 |
<time datetime=2007-08-29>29 August 2007</time>. Work in progress. |
| 747 |
The latest Editor's Draft of the specification is available at |
| 748 |
<code class=URI><<a href="http://dev.w3.org/2006/webapi/selectors-api/Overview.html">http://dev.w3.org/2006/webapi/selectors-api/Overview.html</a>></code>. |
| 749 |
The latest published version of the specification is available at |
| 750 |
<code class=URI><<a href="http://www.w3.org/TR/selectors-api/">http://www.w3.org/TR/selectors-api/</a>></code>.</dd> |
| 751 |
<dt id=ref-XBL2>XBL2</dt> |
| 752 |
<dd><cite><a href="http://www.mozilla.org/projects/xbl/xbl2.html"><abbr>XBL</abbr> |
| 753 |
2.0</a></cite>, Mozilla.org, <time datetime=2007-03-15>15 Mar 2007</time>. |
| 754 |
Work in progress. The latest |
| 755 |
<abbr title="World Wide Web Consortium">W3C</abbr>$B!>(Bpublished |
| 756 |
version of the specification is available at |
| 757 |
<code class=URI><<a href="http://www.w3.org/TR/xbl/">http://www.w3.org/TR/xbl/</a>></code>.</dd> |
| 758 |
</dl> |
| 759 |
</div> |
| 760 |
|
| 761 |
</div> |
| 762 |
|
| 763 |
</body> |
| 764 |
</html> |
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