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Florian Rivoal
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Drop support the the resolution descriptor
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‎css-device-adapt/Overview.html‎

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<h1>CSS Device Adaptation</h1>
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<h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 19 June 2012</h2>
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<h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 19 July 2012</h2>
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<dl>
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<dt>This version:
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<dd>$Date$ (editor's draft)
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<!--<dd><a href="http://www.w3.org/TR/2012/ED-css-device-adapt-20120619/">http://www.w3.org/TR/2012/WD-css-device-adapt-20120619/</a></dd>-->
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<!--<dd><a href="http://www.w3.org/TR/2012/ED-css-device-adapt-20120719/">http://www.w3.org/TR/2012/WD-css-device-adapt-20120719/</a></dd>-->
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<dt>Latest version:
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<li><a href="#the-lsquoorientationrsquo-descriptor"><span
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class=secno>5.9. </span>The ‘<code
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class=descriptor>orientation</code>’ descriptor</a>
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<li><a href="#the-lsquoresolutionrsquo-descriptor"><span
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class=secno>5.10. </span>The ‘<code
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class=descriptor>resolution</code>’ descriptor</a>
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</ul>
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<li><a href="#constraining-viewport-descriptor-values"><span
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<dd>The document should be locked to landscape presentation.
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</dl>
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<h3 id=the-lsquoresolutionrsquo-descriptor><span class=secno>5.10.
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</span>The ‘<a href="#resolution"><code
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class=descriptor>resolution</code></a>’ descriptor</h3>
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<!-- http://lists.w3.org/Archives/Public/www-style/2010Aug/0131.html -->
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<table class=descdef>
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<tbody>
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<tr>
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<td><em>Name:</em>
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<td><dfn id=resolution>resolution</dfn>
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<tr>
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<td><em>Value:</em>
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<td>auto | device
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<tr>
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<td><em>Initial:</em>
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<td><a href="#auto4" title="auto!!resolution">auto</a>
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<tr>
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<td><em>Percentages:</em>
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<td>N/A
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<tr>
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<td><em>Media:</em>
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<td>visual, continuous
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<tr>
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<td><em>Computed value:</em>
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<td>‘<a href="#auto4"><code class=css
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title="auto!!resolution">auto</code></a>’ or ‘<a
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href="#device"><code class=css>device</code></a>’.
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</table>
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<p>The UA relates the CSS pixel to the <a
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href="http://www.w3.org/TR/CSS21/syndata.html#x40">reference pixel</a> or
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the physical <a
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href="http://www.w3.org/TR/CSS21/syndata.html#length-units">length
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units</a> as described in CSS 2.1 <a href="#CSS21"
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rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>. The resolution descriptor
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can be used to override the CSS pixel size chosen by the UA. In CSS,
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absolute length units are fixed in relation to each other, hence, changing
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the CSS pixel resolution will for instance change the physical length of a
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CSS cm.
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<p>Note that setting this descriptor will affect the used lengths for ‘<a
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href="#device-width"><code class=css>device-width</code></a>’, ‘<a
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href="#device-height"><code class=css>device-height</code></a>’, and the
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size of the <a href="#initial-viewport">initial viewport</a>.
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<p>Values have the following meanings:
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<dl>
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<dt>‘<code class=css><dfn id=auto4
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title="auto!!resolution">auto</dfn></code>’
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<dd>Use the UAs CSS pixel resolution.
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<dt>‘<code class=css><dfn id=device>device</dfn></code>’
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<dd>Use device resolution as the CSS pixel resolution. That is, have a 1-1
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relationship between a CSS and a device pixel.
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</dl>
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<h2 id=constraining-viewport-descriptor-values><span class=secno>6.
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</span>Constraining viewport descriptor values</h2>
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descriptors is optional.
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</ul>
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<p class=issue>Need to say something about the resolution descriptor if it
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is kept.
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<h2 id=viewport-meta><span class=secno>11. </span>Viewport <code
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class=html>META</code> element</h2>
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<li><code class=index id=maximum-scale>maximum-scale</code>
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<li><code class=index id=user-scalable>user-scalable</code>
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<li><code class=index id=target-densitydpi>target-densityDpi</code>
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</ul>
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<h3 id=parsing-algorithm><span class=secno>11.2. </span>Parsing algorithm</h3>
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--></pre>
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</div>
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<h4 class="no-num no-toc" id=the-target-densitydpi-property>The <code
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class=index id=target-densitydpi0>target-densityDpi</code> property</h4>
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<p class=note>This property differ from the others since it is from the
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WebKit implementation used in the Android browser and not supported in
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Safari
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<p>The <code class=index id=target-densitydpi1>target-densityDpi</code>
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property is translated into ‘<a href="#resolution"><code
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class=descriptor>resolution</code></a>’ with the following value
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translations.
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<ol>
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<li><code class=index id=device-dpi>device-dpi</code> translates to ‘<a
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href="#device"><code class=css>device</code></a>’
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<li>Other values are dropped
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</ol>
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<h2 id=handling-auto-zoom><span class=secno>12. </span>Handling ‘<a
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href="#auto0"><code class=css title="auto!!zoom">auto</code></a>’ for
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‘<code class=descriptor title="zoom!!descriptor">zoom</code>’</h2>
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<dt id=MEDIAQ>[MEDIAQ]
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<dd>Florian Rivoal. <a
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href="http://www.w3.org/TR/2012/PR-css3-mediaqueries-20120426/"><cite>Media
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Queries.</cite></a> 26 April 2012. W3C Proposed Recommendation. (Work in
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progress.) URL: <a
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href="http://www.w3.org/TR/2012/PR-css3-mediaqueries-20120426/">http://www.w3.org/TR/2012/PR-css3-mediaqueries-20120426/</a>
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href="http://www.w3.org/TR/2012/REC-css3-mediaqueries-20120619/"><cite>Media
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Queries.</cite></a> 19 June 2012. W3C Recommendation. URL: <a
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href="http://www.w3.org/TR/2012/REC-css3-mediaqueries-20120619/">http://www.w3.org/TR/2012/REC-css3-mediaqueries-20120619/</a>
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</dd>
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<!---->
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</dl>
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<td>visual, continuous
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<tr>
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<th><a class=property href="#resolution">resolution</a>
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<td>auto | device
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<td>auto
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<td>N/A
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<td>visual, continuous
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<tr>
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<th><a class=property href="#user-zoom">user-zoom</a>
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<li>orientation, <a href="#auto3"
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title="auto, orientation"><strong>5.9.</strong></a>
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<li>resolution, <a href="#auto4"
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title="auto, resolution"><strong>5.10.</strong></a>
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<li>zoom, <a href="#auto0" title="auto, zoom"><strong>5.5.</strong></a>
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</ul>
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<li>device, <a href="#device" title=device><strong>5.10.</strong></a>
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<li>device-dpi, <a href="#device-dpi" title=device-dpi>#</a>
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<li>device-height, <a href="#device-height"
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title=device-height><strong>5.1.</strong></a>
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<ul>
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<li>portrait, <a href="#portrait" title=portrait><strong>5.9.</strong></a>
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<li>resolution, <a href="#resolution"
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title=resolution><strong>5.10.</strong></a>
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<li>target-densityDpi, <a href="#target-densitydpi"
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title=target-densityDpi>11.1.</a>, <a href="#target-densitydpi0"
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title=target-densityDpi>#</a>, <a href="#target-densitydpi1"
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title=target-densityDpi>#</a>
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<li>user-scalable, <a href="#user-scalable" title=user-scalable>11.1.</a>,
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<a href="#user-scalable0" title=user-scalable>#</a>, <a
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href="#user-scalable1" title=user-scalable>#</a>

‎css-device-adapt/Overview.src.html‎

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<dd>The document should be locked to landscape presentation.</dd>
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</dl>
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<h3>The &lsquo;<code class="descriptor">resolution</code>&rsquo; descriptor</h3>
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<!-- http://lists.w3.org/Archives/Public/www-style/2010Aug/0131.html -->
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<table class="descdef">
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<tbody>
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<tr>
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<td><em>Name:</em></td>
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<td><dfn>resolution</dfn></td>
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</tr>
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<tr>
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<td><em>Value:</em></td>
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<td>auto | device</td>
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</tr>
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<tr>
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<td><em>Initial:</em></td>
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<td><span title="auto!!resolution">auto</span></td>
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</tr>
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<tr>
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<td><em>Percentages:</em></td>
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<td>N/A</td>
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</tr>
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<tr>
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<td><em>Media:</em></td>
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<td>visual, continuous</td>
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</tr>
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<tr>
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<td><em>Computed&nbsp;value:</em></td>
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<td>&lsquo;<code class="css" title="auto!!resolution">auto</code>&rsquo; or
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&lsquo;<code class="css">device</code>&rsquo;. </td>
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</tr>
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</tbody>
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</table>
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<p>The UA relates the CSS pixel to the
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<a href="http://www.w3.org/TR/CSS21/syndata.html#x40">reference pixel</a>
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or the physical
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<a href="http://www.w3.org/TR/CSS21/syndata.html#length-units">length units</a>
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as described in CSS 2.1 [[!CSS21]]. The resolution descriptor can be used to
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override the CSS pixel size chosen by the UA and force a 1 to 1 mapping between
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CSS pixels and physical ones. In CSS, absolute length units are fixed in
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relation to each other, hence, changing the CSS pixel resolution will for
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instance change the physical length of a CSS cm.</p>
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<p>Note that setting this descriptor will affect the used lengths for
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&lsquo;<code class="css">device-width</code>&rsquo;,
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&lsquo;<code class="css">device-height</code>&rsquo;, and the size of the
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<span>initial viewport</span>.
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<p>Values have the following meanings:</p>
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<dl>
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<dt>&lsquo;<code class="css"><dfn title="auto!!resolution">auto</dfn></code>&rsquo;</dt>
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<dd>Use the UAs CSS pixel resolution.</dd>
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<dt>&lsquo;<code class="css"><dfn>device</dfn></code>&rsquo;</dt>
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<dd>Use device resolution as the CSS pixel resolution. That is, have a
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1-1 relationship between a CSS and a device pixel.</dd>
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</dl>
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<h2>Constraining viewport descriptor values</h2>
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<h3>Definitions</h3>
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descriptors is optional.</p></li>
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</ul>
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<p class="issue">Need to say something about the resolution descriptor if it
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is kept.</p>
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<h2 id="viewport-meta">Viewport <code class="html">META</code> element</h2>
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<p><em>This section is not normative.</em></p>
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<li><code class="index">minimum-scale</code></li>
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<li><code class="index">maximum-scale</code></li>
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<li><code class="index">user-scalable</code></li>
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<li><code class="index">target-densityDpi</code></li>
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</ul>
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<h3 id="parsing-algorithm">Parsing algorithm</h3>
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--></pre>
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</div>
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<h4 class="no-num no-toc">The <code class="index">target-densityDpi</code> property</h4>
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<p class="note">This property differ from the others since it is from the WebKit
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implementation used in the Android browser and not supported in Safari</p>
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<p>The <code class="index">target-densityDpi</code> property is translated
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into &lsquo;<code class="descriptor">resolution</code>&rsquo; with the
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following value translations.</p>
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<ol>
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<li><code class="index">device-dpi</code> translates to
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&lsquo;<code class="css">device</code>&rsquo;</li>
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<li>Other values are dropped</li>
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</ol>
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<h2 id="handling-auto-zoom">Handling &lsquo;<code class="css" title="auto!!zoom">auto</code>&rsquo;
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for &lsquo;<code class="descriptor" title="zoom!!descriptor">zoom</code>&rsquo;</h2>
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