csswg-drafts/css-tv/Overview.html at 64af996fca17193dba7058f732ced2a27e6dce16 · w3c/csswg-drafts · GitHub

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html lang="en" xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">
 <head profile="http://dublincore.org/documents/2008/08/04/dc-html/ ">
  <title>CSS TV Profile 1.0</title>

  <link href="http://purl.org/dc/terms/" rel="schema.dcterms" />
  <link href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright"
   rel="dcterms.rights" />
  <meta content="CSS TV Profile 1.0" name="dcterms.title" />
  <meta content="text" name="dcterms.type" />
  <meta content="2014-10-10" name="dcterms.date" />
  <meta content="Sean Hayes" name="dcterms.creator" />
  <meta content="Glenn Adams" name="dcterms.creator" />
  <meta content="Tantek Çelik" name="dcterms.creator" />
  <meta content="Håkon Wium Lie" name="dcterms.creator" />
  <meta content="W3C" name="dcterms.publisher" />
  <meta content="http://www.w3.org/TR/2014/NOTE-css-tv-20141010/"
   name="dcterms.identifier" />
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  <meta content="Sean Hayes" name="author" />
  <meta content="Glenn Adams" name="author" />
  <meta content="Tantek Çelik" lang="tr" name="author" />
  <meta content="Håkon Wium Lie" lang="no" name="author" />
  <meta content="CSS Cascading Style Sheets TV Television Profile"
   name="keywords" />
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  <style type="text/css">
    th { background: #005A9C; color: white; }
    tr.yes { background: aqua; }
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    .ins,.del { background: yellow; }
    .del { text-decoration: line-through; }
    img.head { width:72px; height:48px }
  </style>
  <link href="https://www.w3.org/StyleSheets/TR/W3C-WG-NOTE.css"
   rel="stylesheet" type="text/css" /></head>

 <body>
  <div class="head"> <!--begin-logo-->
   <p><a href="http://www.w3.org/"><img alt="W3C" height="48"
    src="https://www.w3.org/Icons/w3c_home" width="72" /></a> <!--end-logo--></p>

   <h1>CSS TV Profile 1.0</h1>

   <h2 class="no-num no-toc">W3C Working Group Note 10 October 2014</h2>

   <dl>
    <dt>This version:</dt>

    <dd><a href="http://www.w3.org/TR/2014/NOTE-css-tv-20141010/">
     http://www.w3.org/TR/2014/NOTE-css-tv-20141010/</a></dd>

    <dt>Latest version:</dt>

    <dd><a href="http://www.w3.org/TR/css-tv">
     http://www.w3.org/TR/css-tv</a></dd>

    <dt>Previous version:</dt>

    <dd><a href="http://www.w3.org/TR/2003/CR-css-tv-20030514">
     http://www.w3.org/TR/2003/CR-css-tv-20030514</a></dd>

    <dt>Authors:</dt>

    <dd>Sean Hayes (<a href="http://www.microsoft.com/">Microsoft</a>) &lt;<a
     href="mailto:shayes@microsoft.com">shayes@microsoft.com</a>&gt;</dd>

    <dd>Glenn Adams (<a href="http://www.cox.com">Cox Communications,
     Inc.</a>) &lt;<a href="mailto:glenn@skynav.com">glenn@skynav.com</a>&gt;</dd>

    <dd><span lang="tr">Tantek Çelik</span> (<a
     href="http://www.mozilla.org//">Mozilla Foundation</a>) &lt;<a
     href="mailto:tantek@cs.stanford.edu">tantek@cs.stanford.edu</a>&gt;</dd>

    <dd><span lang="no">Håkon Wium Lie</span> (<a
     href="http://www.opera.com/">Opera Software</a>) &lt;<a
     href="mailto:howcome@opera.com">howcome@opera.com</a>&gt;</dd>
   </dl>
   <!--begin-copyright-->
   <p class="copyright"><a
    href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright"
    rel="license">Copyright</a> © 2014 <a href="http://www.w3.org/"><abbr
    title="World Wide Web Consortium">W3C</abbr></a><sup>®</sup> (<a
    href="http://www.csail.mit.edu/"><abbr
    title="Massachusetts Institute of Technology">MIT</abbr></a>, <a
    href="http://www.ercim.eu/"><abbr
    title="European Research Consortium for Informatics and Mathematics">ERCIM</abbr></a>,
    <a href="http://www.keio.ac.jp/">Keio</a>, <a
    href="http://ev.buaa.edu.cn/">Beihang</a>), All Rights Reserved. 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>
   <!--end-copyright-->
   <hr title="Separator for header" />
  </div>

  <h2 class="no-num no-toc">Abstract</h2>

  <p>This specification defines a subset of Cascading Style Sheets Level 2
   and CSS3 module: Color specifications tailored to the needs and
   constraints of TV devices.</p>
  <!-- **************************** -->
  <!--      STATUS of DOCUMENT      -->
  <!-- **************************** -->

  <h2 class="no-num no-toc" id="status">Status of this document</h2>
  <!--begin-status-->

  <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 at http://www.w3.org/TR/.</a></em></p>

  <p>Publication as a Working Group Note 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>

  <p>This document was produced by the <a
   href="http://www.w3.org/Style/CSS/members">CSS Working Group</a> (part of
   the <a href="http://www.w3.org/Style/">Style Activity</a>).</p>

  <p>The (<a
   href="http://lists.w3.org/Archives/Public/www-style/">archived</a>) public
   mailing list <a
   href="mailto:www-style@w3.org?Subject=%5Bcss-tv%5D%20PUT%20SUBJECT%20HERE">www-style@w3.org</a>
   (see <a href="http://www.w3.org/Mail/Request">instructions</a>) is
   preferred for discussion of this document. When sending e-mail, please put
   the text “css-tv” in the subject, preferably like this:
   “[<!---->css-tv<!---->] <em>…summary of comment…</em>”</p>

  <p>This document was produced by a group operating under the <a
   href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February
   2004 W3C Patent Policy</a>. W3C maintains a <a
   href="http://www.w3.org/2004/01/pp-impl/32061/status"
   rel="disclosure">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>This document is governed by the <a
   href="http://www.w3.org/2014/Process-20140801/"
   id="w3c_process_revision">1 August 2014 W3C Process Document</a>.</p>
  <!--end-status-->

  <p class="mtb"><em>At this time, the CSS Working Group does not envisage
   further work on this specification and does not plan to propose it as a
   W3C Recommendation.</em></p>
  <!-- *************************** -->
  <!--      TABLE OF CONTENTS      -->
  <!-- *************************** -->

  <nav id="toc"
  <h2 class="no-num no-toc" id="contents">Table of contents</h2>
  <!--begin-toc-->

  <ul class="toc">
   <li><a href="#section-overview"><span class="secno">1. </span>Overview</a></li>

   <li><a href="#section-conformance"><span class="secno">2.
    </span>Conformance</a></li>

   <li><a href="#section-selectors"><span class="secno">3. </span>Selectors
    and at-rules</a>
    <ul class="toc">
     <li><a href="#selectors"><span class="secno">3.1. </span>Selectors</a></li>

     <li><a href="#at-rules"><span class="secno">3.2. </span>at-rules</a></li>
    </ul>
   </li>

   <li><a href="#section-properties"><span class="secno">4.
    </span>Properties</a></li>

   <li><a href="#section-syntax"><span class="secno">5. </span>CSS Syntax</a></li>

   <li><a href="#section-assigning"><span class="secno">6. </span>Assigning
    Property Values, Cascading, and Inheritance</a></li>

   <li><a href="#section-mediatypes"><span class="secno">7. </span>Media
    Types</a></li>

   <li><a href="#section-ack"><span class="secno">8.
    </span>Acknowledgements</a></li>

   <li class="no-num"><a href="#section-references">Appendix A. Normative
    References</a></li>
  </ul>
  <!--end-toc-->
  </nav>
  <!-- ****************** -->
  <!--      OVERVIEW      -->
  <!-- ****************** -->

  <h2 id="section-overview"><span class="secno">1. </span>Overview</h2>

  <p>This document specifies a profile of the Cascading Style Sheets level 2
   (CSS2) and CSS3 module: Color specifications appropriate for TV devices
   such as set top boxes or integrated interactive television sets that
   display their output on a television screen. Conformance to this profile
   means that a user agent supports, at minimum, the features defined in this
   specification. This subject is addressed in <a
   href="#section-conformance">Section 2, Conformance,</a> below.</p>

  <p>As defined in <a href="#ref-CSS2"
   rel="biblioentry">[CSS2]<!--{{!CSS2}}--></a>:</p>

  <blockquote>
   <p>CSS2 is a style sheet language that allows authors and users to attach
    style (e.g., fonts, spacing, and aural cues) to structured documents
    (e.g., HTML documents and XML applications). By separating the
    presentation style of documents from the content of documents, CSS2
    simplifies Web authoring and site maintenance. CSS2 builds on CSS1 (see
    <a href="#ref-CSS1" rel="biblioentry">[CSS1]<!--{{!CSS1}}--></a>) and,
    with very few exceptions, all valid CSS1 style sheets are valid CSS2
    style sheets. CSS2 supports media-specific style sheets so that authors
    may tailor the presentation of their documents to visual browsers, aural
    devices, printers, braille devices, handheld devices, etc.</p>
  </blockquote>

  <p>In summary, CSS2 specifies how developers can author style sheets for
   presenting documents across multiple devices and media types. While this
   is very important, it is also important that authors have an understanding
   of what features are supported on these different devices. Likewise, it is
   important that similar devices operate in a similar manner. Otherwise,
   authors will need to develop style sheets for each version of each device
   -- raising the cost of content development and decreasing
   interoperability.</p>

  <p>The CSS TV Profile specifies a conformance profile for TV devices,
   identifying a minimum set of properties, values, selectors, and cascading
   rules. The resulting CSS TV Profile includes the vast majority of CSS1,
   portions of CSS2 and CSS3 module: Color. The CSS TV Profile is a proper
   superset of the CSS Mobile Profile, with the use of the ‘<code
   class="property">tv</code>’ media type instead of the ‘<code
   class="property">handheld</code>’ media type.</p>
  <!-- ******************** -->
  <!--      CONFORMANCE     -->
  <!-- ******************** -->

  <h2 id="section-conformance"><span class="secno">2. </span>Conformance</h2>

  <p>The primary role of a profile is to define a subset of features that
   provides a minimal guarantee of interoperability. In the case of the CSS
   TV Profile, this guarantee is that a conforming user agent will support
   the features defined in this specification following the CSS2 conformance
   clause (<a href="#ref-CSS2" rel="biblioentry">[CSS2]<!--{{!CSS2}}--></a>
   Section 3.2), recast and summarized below:</p>

  <ol>
   <li>A CSS TV Profile conforming user agent (TV-UA) MUST support the
    <em>all</em> and <em>tv</em> CSS2 media types. A TV-UA MAY support other
    CSS2 media types, as well.</li>

   <li>For each source document, a TV-UA MUST attempt to retrieve all
    associated style sheets that are appropriate for the supported media
    types.</li>

   <li>A TV-UA MUST parse the style sheets according to this specification.
    In particular, the TV-UA MUST recognize all CSS TV Profile at-rules,
    blocks, declarations, and selectors. If a TV-UA encounters a property
    that applies for a supported media type, the TV-UA MUST parse the value
    according to the property definition. This means that the TV-UA MUST
    accept all valid values and MUST ignore declarations with invalid values.
    TV-UA MUST ignore rules that apply to unsupported media types.</li>

   <li>For each element in a document tree, the TV-UA MUST assign a value for
    every applicable property according to the property's definition and the
    rules of cascading and inheritance.</li>

   <li>If the source document comes with alternate style sheets (such as with
    the "alternate" keyword in HTML 4.0 [HTML40]), the TV-UA SHOULD allow the
    user to select one from among these style sheets and apply the selected
    one.</li>
  </ol>

  <p>As with CSS2, there are qualifications to this conformance clause:</p>

  <ol>
   <li>Values MAY be approximated when required by the TV-UA.</li>

   <li>The inability of a TV-UA to implement part of this specification due
    to the limitations of a particular device (e.g., a TV-UA cannot render
    colors on a monochrome monitor or page) SHALL NOT imply non-conformance.</li>
  </ol>

  <p>It is recommended that authors use this conformance profile to take
   advantage of forward compatibility. Authors should be able to use style
   properties with an understanding that the cascading rules are processed
   correctly and that unknown properties and values are ignored. For example:</p>

  <div class="code-example">
   <pre>
  h3 {
    display: inline;
    display: run-in;
  }
  </pre>
  </div>

  <p>A TV-UA that can process the ‘<code class="property">run-in</code>’
   value for the ‘<code class="property">display</code>’ property will
   accept the first display declaration and then "write over" that value with
   the second display declaration. A TV-UA that cannot process the ‘<code
   class="property">run-in</code>’ value will process the first display
   specification and ignore the second display specification.</p>
  <!-- ******************* -->
  <!--      SELECTORS      -->
  <!-- ******************* -->

  <h2 id="section-selectors"><span class="secno">3. </span>Selectors and
   at-rules</h2>

  <h3 id="selectors"><span class="secno">3.1. </span>Selectors</h3>

  <p> In CSS2, pattern matching rules determine which style rules apply to
   elements in the document tree <a href="#ref-CSS2"
   rel="biblioentry">[CSS2]<!--{{!CSS2}}--></a>.</p>

  <p>The following table summarizes CSS TV Profile selector syntax. In
   addition to these selectors, the CSS TV Profile includes the CSS2 grouping
   mechanism (See <a href="#ref-CSS2"
   rel="biblioentry">[CSS2]<!--{{!CSS2}}--></a> Section 5.2.1).</p>

  <div class="note">
   <p> <em><strong>Note.</strong> Unsupported selectors are parsed as invalid
    (which would affect valid selectors in the same group), the same as if a
    purely CSS1 UA were to encounter selectors new in CSS2. Of course a TV-UA
    is free to implement more selectors than required by CSS TV. </em></p>
  </div>

  <table border="1" width="80%">
   <tbody>
    <tr>
     <th>Pattern</th>

     <th>Meaning</th>

     <th>Selector type</th>

     <th>CSS TV</th>
    </tr>

    <tr class="yes">
     <td>*</td>

     <td>Matches any element</td>

     <td>Universal selector</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E</td>

     <td>Matches any E element (i.e., and element of type E)</td>

     <td>Type selectors</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E F</td>

     <td>Matches any F element that is a descendent of an E element</td>

     <td>Descendent selectors</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E &gt; F</td>

     <td>Matches any F element that is a child of an element E</td>

     <td>Child selectors</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E:first-child</td>

     <td>Matches element E when it is the first child of its parent</td>

     <td>The :first-child pseudo-class</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E:link<br />
      E:visited</td>

     <td>Matches element E if E is the source anchor of a hyperlink of which
      the target is not yet visited (:link) or already visited (:visited).</td>

     <td>The link pseudo-classes</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E:active</td>

     <td>Matches E during certain user actions.</td>

     <td>The dynamic pseudo-classes</td>

     <td>Yes</td>
    </tr>

    <tr class="no">
     <td>E:hover</td>

     <td>Matches E during certain user actions.</td>

     <td>The dynamic pseudo-classes</td>

     <td>No</td>
    </tr>

    <tr class="yes">
     <td>E:focus</td>

     <td>Matches E during certain user actions.</td>

     <td>The dynamic pseudo-classes</td>

     <td>Yes</td>
    </tr>

    <tr class="no">
     <td>E:lang(c)</td>

     <td>Matches element of type E if it is in (human) language c (the
      document language specifies how language is determined).</td>

     <td>The :lang() pseudo-class</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>E + F</td>

     <td>Matches any F element immediately preceded by an element E.</td>

     <td>Adjacent selectors</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>E[foo]</td>

     <td>Matches any E element with the "foo" attribute set (whatever the
      value).</td>

     <td>Attribute selectors</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>E[foo="bar"]</td>

     <td>Matches any E element whose "foo" attribute value is exactly equal
      to "bar".</td>

     <td>Attribute selectors</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>E[foo~="bar"]</td>

     <td>Matches any E element whose "foo" attribute value is a list of
      space-separated values, one of which is exactly equal to "bar".</td>

     <td>Attribute selectors</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>E[foo|="bar"]</td>

     <td>Matches any E element whose "foo" attribute value has a
      hyphen-separated list of values beginning (from the left) with "bar".</td>

     <td>Attribute selectors</td>

     <td>No</td>
    </tr>

    <tr class="yes">
     <td>E:first-line</td>

     <td>Matches the first formatted line of an E element.</td>

     <td>The :first-line pseudo-element</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E:first-letter</td>

     <td>Matches the first formatted letter of an E element.</td>

     <td>The :first-letter pseudo-element</td>

     <td>Yes</td>
    </tr>

    <tr class="no">
     <td>E:before</td>

     <td>Matches/creates generated content before an E element.</td>

     <td>The :before pseudo-element</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>E:after</td>

     <td>Matches/creates generated content after an E element.</td>

     <td>The :after pseudo-element</td>

     <td>No</td>
    </tr>

    <tr class="yes">
     <td>E.bar</td>

     <td>Matches any E element whose class attribute (as defined by the
      document language) value is a list of space-separated values, one of
      which is exactly equal to "bar".</td>

     <td>Class selectors</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>E#bar</td>

     <td>Matches any E element whose ID attribute (as defined by the document
      language) is equal to "bar".</td>

     <td>ID selectors</td>

     <td>Yes</td>
    </tr>
   </tbody>
  </table>

  <h3 id="at-rules"><span class="secno">3.2. </span>at-rules</h3>

  <p>The following table summarizes CSS TV Profile at-rule syntax.</p>

  <table border="1" width="80%">
   <tbody>
    <tr>
     <th>at-rule</th>

     <th>Function</th>

     <th>CSS TV</th>
    </tr>

    <tr class="yes">
     <td>@import</td>

     <td>Imports an external style sheet.</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>@charset</td>

     <td>Defines character set for the style sheet.</td>

     <td>Yes</td>
    </tr>

    <tr class="yes">
     <td>@media</td>

     <td>Groups a set of style rules to apply only to one or more particular
      media.</td>

     <td>Yes</td>
    </tr>

    <tr class="no">
     <td>@font-face</td>

     <td>Defines a named font-family, including for downloading.</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>@page</td>

     <td>Defines a (optionally named) page formatting context.</td>

     <td>No</td>
    </tr>

    <tr class="no">
     <td>@color-profile</td>

     <td>Defines a named color-profile.</td>

     <td>No</td>
    </tr>
   </tbody>
  </table>
  <!-- ******************************* -->
  <!--      PROPERTIES AND VALUES      -->
  <!-- ******************************* -->

  <h2 id="section-properties"><span class="secno">4. </span>Properties</h2>

  <p>The following table summarizes CSS TV Profile properties and property
   values from CSS2. Refer to <a href="#ref-CSS2"
   rel="biblioentry">[CSS2]<!--{{!CSS2}}--></a> for the definition of these
   properties and values.</p>

  <table border="1" width="80%">
   <thead>
    <tr align="center">
     <th>Name</th>

     <th>CSS TV</th>

     <th>CSS Values</th>

     <th>Initial value</th>
    </tr>
   </thead>

   <tbody>
    <tr class="no">
     <td>‘<code class="property">azimuth</code>’</td>

     <td>No</td>

     <td>&lt;angle&gt; | [ left-side | far-left | left | center-left | center
      | center-right | right | far-right | right-side ] || behind ] |
      leftwards | rightwards | inherit</td>

     <td>center</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">background</code>’</td>

     <td>[‘<code class="property">background-color</code>’ || ‘<code
      class="property">background-image</code>’ || ‘<code
      class="property">background-repeat</code>’ || ‘<code
      class="property">background-position</code>’] | inherit</td>

     <td>[‘<code class="property">background-color</code>’ || ‘<code
      class="property">background-image</code>’ || ‘<code
      class="property">background-repeat</code>’ || ‘<code
      class="property">background-attachment</code>’ || ‘<code
      class="property">background-position</code>’] | inherit</td>

     <td>see individual properties</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">background-attachment</code>’</td>

     <td>No</td>

     <td>scroll | fixed | inherit</td>

     <td>scroll</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">background-color</code>’</td>

     <td>Yes</td>

     <td>&lt;color&gt; | transparent | inherit</td>

     <td>transparent</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">background-image</code>’</td>

     <td>Yes</td>

     <td>&lt;uri&gt; | none | inherit</td>

     <td>none</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">background-position</code>’</td>

     <td>Yes</td>

     <td>[ [ &lt;percentage&gt; | &lt;length&gt; ]{1,2} | [ [top | center |
      bottom] || [left | center | right] ] ] | inherit</td>

     <td>0% 0%</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">background-repeat</code>’</td>

     <td>Yes</td>

     <td>repeat | repeat-x | repeat-y | no-repeat | inherit</td>

     <td>repeat</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border</code>’</td>

     <td>Yes</td>

     <td>[ &lt;border-width&gt; || &lt;border-style&gt; ||
      &lt;border-color&gt; ] | inherit</td>

     <td>see individual properties</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">border-collapse</code>’</td>

     <td>No</td>

     <td>collapse | separate | inherit</td>

     <td>separate</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border-color</code>’</td>

     <td>Yes</td>

     <td>&lt;color&gt;{1,4} | transparent | inherit</td>

     <td>see individual properties</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">border-spacing</code>’</td>

     <td>No</td>

     <td>&lt;length&gt; &lt;length&gt;? | inherit</td>

     <td>0</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border-style</code>’</td>

     <td>Yes</td>

     <td>&lt;border-style&gt;{1,4} | inherit</td>

     <td>see individual properties</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border-top</code>’ ‘<code
      class="property">border-right</code>’ ‘<code
      class="property">border-bottom</code>’ ‘<code
      class="property">border-left</code>’</td>

     <td>Yes</td>

     <td>[ &lt;border-width&gt; || &lt;border-style&gt; ||
      &lt;border-color&gt; ] | inherit</td>

     <td>see individual properties</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border-top-color</code>’ ‘<code
      class="property">border-right-color</code>’ ‘<code
      class="property">border-bottom-color</code>’ ‘<code
      class="property">border-left-color</code>’</td>

     <td>Yes</td>

     <td>&lt;color&gt; | transparent | inherit</td>

     <td>the value of the ‘<code class="property">color</code>’ property</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border-top-style</code>’ ‘<code
      class="property">border-right-style</code>’ ‘<code
      class="property">border-bottom-style</code>’ ‘<code
      class="property">border-left-style</code>’</td>

     <td>Yes</td>

     <td>&lt;border-style&gt; | inherit</td>

     <td>none</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border-top-width</code>’ ‘<code
      class="property">border-right-width</code>’ ‘<code
      class="property">border-bottom-width</code>’ ‘<code
      class="property">border-left-width</code>’</td>

     <td>Yes</td>

     <td>&lt;border-width&gt; | inherit</td>

     <td>medium</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">border-width</code>’</td>

     <td>Yes</td>

     <td>&lt;border-width&gt;{1,4} | inherit</td>

     <td>see individual properties</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">bottom</code>’</td>

     <td>Yes</td>

     <td>&lt;length&gt; | &lt;percentage&gt; | auto | inherit</td>

     <td>auto</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">caption-side</code>’</td>

     <td>Yes</td>

     <td>top | bottom | left | right | inherit</td>

     <td>top</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">clear</code>’</td>

     <td>Yes</td>

     <td>none | left | right | both | inherit</td>

     <td>none</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">clip</code>’</td>

     <td>Yes</td>

     <td>&lt;shape&gt; | auto | inherit</td>

     <td>auto</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">color</code>’</td>

     <td>Yes</td>

     <td>&lt;color&gt; | inherit</td>

     <td>depends on user agent</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">content</code>’</td>

     <td>No</td>

     <td>[ &lt;string&gt; | &lt;uri&gt; | &lt;counter&gt; | attr(X) |
      open-quote | close-quote | no-open-quote | no-close-quote ]+ | inherit</td>

     <td>empty string</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">counter-increment</code>’</td>

     <td>No</td>

     <td>[ &lt;identifier&gt; &lt;integer&gt;? ]+ | none | inherit</td>

     <td>none</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">counter-reset</code>’</td>

     <td>No</td>

     <td>[ &lt;identifier&gt; &lt;integer&gt;? ]+ | none | inherit</td>

     <td>none</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">cue</code>’</td>

     <td>No</td>

     <td>[ ‘<code class="property">cue-before</code>’ || ‘<code
      class="property">cue-after</code>’ ] | inherit</td>

     <td>see individual properties</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">cue-after</code>’</td>

     <td>No</td>

     <td>&lt;uri&gt; | none | inherit</td>

     <td>none</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">cue-before</code>’</td>

     <td>No</td>

     <td>&lt;uri&gt; | none | inherit</td>

     <td>none</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">cursor</code>’</td>

     <td>No</td>

     <td>[ [&lt;uri&gt; ,]* [ auto | crosshair | default | pointer | move |
      e-resize | ne-resize | nw-resize | n-resize | se-resize | sw-resize |
      s-resize | w-resize| text | wait | help ] ] | inherit</td>

     <td>auto</td>
    </tr>

    <tr class="no">
     <td>‘<code class="property">direction</code>’</td>

     <td>No</td>

     <td>ltr | rtl | inherit</td>

     <td>ltr</td>
    </tr>

    <tr class="yes">
     <td>‘<code class="property">display</code>’</td>

     <td>inline | block | list-item | none | inherit</td>

     <td>inline | block | list-item | run-in | compact | marker | table |
      inline-table | table-row-group | table-header-group |
      table-footer-group | table-row | table-column-group | table-column |