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[css3-values] Editorial fix - be more precise about zero lengths.
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‎css3-values/Overview.html‎

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rel=dcterms.rights>
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<meta content="CSS Values and Units Module Level 3" name=dcterms.title>
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<meta content=text name=dcterms.type>
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<meta content=2012-10-16 name=dcterms.issued>
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<meta content=2012-12-03 name=dcterms.issued>
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<meta content="http://dev.w3.org/csswg/css3-values/" name=dcterms.creator>
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<meta content=W3C name=dcterms.publisher>
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<meta content="http://www.w3.org/TR/2012/ED-css3-values-20121016/"
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<meta content="http://www.w3.org/TR/2012/ED-css3-values-20121203/"
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name=dcterms.identifier>
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<style type="text/css">
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code, small { white-space: nowrap }
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<h1>CSS Values and Units Module Level 3</h1>
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<h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 16 October
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<h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 3 December
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2012</h2>
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<dl>
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<dt>This version:
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<dd><a
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href="http://www.w3.org/TR/2012/ED-css3-values-20121016/">http://www.w3.org/TR/2012/ED-css3-values-20121016/</a>
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href="http://www.w3.org/TR/2012/ED-css3-values-20121203/">http://www.w3.org/TR/2012/ED-css3-values-20121203/</a>
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<dt>Latest version:
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<p>Lengths refer to distance measurements and are denoted by <dfn
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id=length-value><var>&lt;length></var></dfn> in the property definitions.
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A length is a <a href="#dimension"><i>dimension</i></a>. A zero length may
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be represented instead as the <a
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href="#number-value"><var>&lt;number></var></a> ‘<code
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class=css>0</code>’. (In other words, for zero lengths the unit
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identifier is optional.)
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A length is a <a href="#dimension"><i>dimension</i></a>. However, for zero
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lengths the unit identifier is optional (i.e. can be syntactically
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represented as the <a href="#number-value"><var>&lt;number></var></a>
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‘<code class=css>0</code>’).
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<p>A <dfn id=dimension>dimension</dfn> is a <a
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href="#number"><i>number</i></a> immediately followed by a unit
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<ul class=indexlist>
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<li>absolute length units, <a href="#absolute-length-units"
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title="absolute length units"><strong>5.2.</strong></a>
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title="section 5.2."><strong>5.2.</strong></a>
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<li>&lt;angle>, <a href="#angle-value"
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title="&lt;angle>"><strong>6.1.</strong></a>
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title="section 6.1."><strong>6.1.</strong></a>
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<li>attr(), <a href="#attr" title="attr()"><strong>8.3.</strong></a>
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<li>attr(), <a href="#attr" title="section 8.3."><strong>8.3.</strong></a>
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<li>authoring tool, <a href="#authoring-tool"
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title="authoring tool"><strong>#</strong></a>
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title="section ??"><strong>??</strong></a>
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<li>calc(), <a href="#calc" title="calc()"><strong>8.1.</strong></a>
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<li>calc(), <a href="#calc" title="section 8.1."><strong>8.1.</strong></a>
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<li>ch, <a href="#ch-unit" title=ch><strong>5.1.1.</strong></a>
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<li>ch, <a href="#ch-unit"
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title="section 5.1.1."><strong>5.1.1.</strong></a>
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<li><a href="#color-value"><var>&lt;color></var></a>, <a
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href="#color-value" title="&lt;color>"><strong>7.1.</strong></a>
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href="#color-value" title="section 7.1."><strong>7.1.</strong></a>
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<li>‘<a href="#default"><code class=css>default</code></a>’, <a
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href="#default" title="''default''"><strong>3.1.1.</strong></a>
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href="#default" title="section 3.1.1."><strong>3.1.1.</strong></a>
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<li>deg, <a href="#deg" title=deg><strong>6.1.</strong></a>
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<li>deg, <a href="#deg" title="section 6.1."><strong>6.1.</strong></a>
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<li>dimension, <a href="#dimension"
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title=dimension><strong>5.</strong></a>
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title="section 5."><strong>5.</strong></a>
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<li>dpcm, <a href="#dpcm" title=dpcm><strong>6.4.</strong></a>
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<li>dpcm, <a href="#dpcm" title="section 6.4."><strong>6.4.</strong></a>
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<li>dpi, <a href="#dpi" title=dpi><strong>6.4.</strong></a>
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<li>dpi, <a href="#dpi" title="section 6.4."><strong>6.4.</strong></a>
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<li>dppx, <a href="#dppx" title=dppx><strong>6.4.</strong></a>
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<li>dppx, <a href="#dppx" title="section 6.4."><strong>6.4.</strong></a>
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<li>em, <a href="#em-unit" title=em><strong>5.1.1.</strong></a>
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<li>em, <a href="#em-unit"
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title="section 5.1.1."><strong>5.1.1.</strong></a>
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<li>ex, <a href="#ex-unit" title=ex><strong>5.1.1.</strong></a>
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<li>ex, <a href="#ex-unit"
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title="section 5.1.1."><strong>5.1.1.</strong></a>
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<li>&lt;frequency>, <a href="#frequency-value"
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title="&lt;frequency>"><strong>6.3.</strong></a>
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title="section 6.3."><strong>6.3.</strong></a>
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<li>functional notation, <a href="#functional-notation0"
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title="functional notation"><strong>8.</strong></a>
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title="section 8."><strong>8.</strong></a>
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<li>grad, <a href="#grad" title=grad><strong>6.1.</strong></a>
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<li>grad, <a href="#grad" title="section 6.1."><strong>6.1.</strong></a>
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<li>Hz, <a href="#hz" title=Hz><strong>6.3.</strong></a>
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<li>Hz, <a href="#hz" title="section 6.3."><strong>6.3.</strong></a>
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<li>identifier, <a href="#identifier"
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title=identifier><strong>3.</strong></a>
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title="section 3."><strong>3.</strong></a>
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<li><a href="#image-value"><var>&lt;image></var></a>, <a
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href="#image-value" title="&lt;image>"><strong>7.2.</strong></a>
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href="#image-value" title="section 7.2."><strong>7.2.</strong></a>
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<li>‘<a href="#inherit"><code class=css>inherit</code></a>’, <a
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href="#inherit" title="''inherit''"><strong>3.1.1.</strong></a>
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href="#inherit" title="section 3.1.1."><strong>3.1.1.</strong></a>
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<li>‘<a href="#initial"><code class=css>initial</code></a>’, <a
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href="#initial" title="''initial''"><strong>3.1.1.</strong></a>
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href="#initial" title="section 3.1.1."><strong>3.1.1.</strong></a>
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<li>integer, <a href="#integer" title=integer><strong>4.1.</strong></a>
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<li>integer, <a href="#integer"
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title="section 4.1."><strong>4.1.</strong></a>
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<li><a href="#integer-value"><var>&lt;integer></var></a>, <a
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href="#integer-value" title="&lt;integer>"><strong>4.1.</strong></a>
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href="#integer-value" title="section 4.1."><strong>4.1.</strong></a>
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<li>kHz, <a href="#khz" title=kHz><strong>6.3.</strong></a>
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<li>kHz, <a href="#khz" title="section 6.3."><strong>6.3.</strong></a>
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<li><a href="#length-value"><var>&lt;length></var></a>, <a
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href="#length-value" title="&lt;length>"><strong>5.</strong></a>
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href="#length-value" title="section 5."><strong>5.</strong></a>
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<li>ms, <a href="#ms" title=ms><strong>6.2.</strong></a>
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<li>ms, <a href="#ms" title="section 6.2."><strong>6.2.</strong></a>
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<li>number, <a href="#number" title=number><strong>4.2.</strong></a>
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<li>number, <a href="#number"
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title="section 4.2."><strong>4.2.</strong></a>
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<li><a href="#number-value"><var>&lt;number></var></a>, <a
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href="#number-value" title="&lt;number>"><strong>4.2.</strong></a>
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href="#number-value" title="section 4.2."><strong>4.2.</strong></a>
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<li>percentage, <a href="#percentage"
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title=percentage><strong>4.3.</strong></a>
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title="section 4.3."><strong>4.3.</strong></a>
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<li><a href="#percentage-value"><var>&lt;percentage></var></a>, <a
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href="#percentage-value"
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title="&lt;percentage>"><strong>4.3.</strong></a>
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href="#percentage-value" title="section 4.3."><strong>4.3.</strong></a>
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<li><a href="#position-value"><var>&lt;position></var></a>, <a
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href="#position-value" title="&lt;position>"><strong>7.3.</strong></a>
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href="#position-value" title="section 7.3."><strong>7.3.</strong></a>
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<li>rad, <a href="#rad" title=rad><strong>6.1.</strong></a>
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<li>rad, <a href="#rad" title="section 6.1."><strong>6.1.</strong></a>
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title="reference pixel"><strong>5.2.</strong></a>
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title="section 5.2."><strong>5.2.</strong></a>
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<li>relative length, <a href="#relative-length-units"
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title="relative length"><strong>5.1.</strong></a>
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title="section 5.1."><strong>5.1.</strong></a>
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<li>rem, <a href="#rem-unit" title=rem><strong>5.1.1.</strong></a>
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<li>rem, <a href="#rem-unit"
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title="section 5.1.1."><strong>5.1.1.</strong></a>
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<li>renderer, <a href="#renderer" title=renderer><strong>#</strong></a>
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<li>renderer, <a href="#renderer"
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title="section ??"><strong>??</strong></a>
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<li>&lt;resolution>, <a href="#resolution-value"
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title="&lt;resolution>"><strong>6.4.</strong></a>
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title="section 6.4."><strong>6.4.</strong></a>
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<li>resolved type, <a href="#resolved-type"
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title="resolved type"><strong>8.1.2.</strong></a>
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title="section 8.1.2."><strong>8.1.2.</strong></a>
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<li>s, <a href="#s" title=s><strong>6.2.</strong></a>
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<li>s, <a href="#s" title="section 6.2."><strong>6.2.</strong></a>
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<li><a href="#string-value"><var>&lt;string></var></a>, <a
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href="#string-value" title="&lt;string>"><strong>3.2.</strong></a>
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href="#string-value" title="section 3.2."><strong>3.2.</strong></a>
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<li>style sheet
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<ul>
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title="style sheet, as conformance class"><strong>#</strong></a>
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title="section ??"><strong>??</strong></a>
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</ul>
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<li>&lt;time>, <a href="#time-value"
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title="&lt;time>"><strong>6.2.</strong></a>
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title="section 6.2."><strong>6.2.</strong></a>
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<li>toggle(), <a href="#toggle" title="toggle()"><strong>8.2.</strong></a>
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<li>toggle(), <a href="#toggle"
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title="section 8.2."><strong>8.2.</strong></a>
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<li>turn, <a href="#turn" title=turn><strong>6.1.</strong></a>
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<li>turn, <a href="#turn" title="section 6.1."><strong>6.1.</strong></a>
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<li>URL, <a href="#url" title=URL><strong>3.3.</strong></a>
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<li>URL, <a href="#url" title="section 3.3."><strong>3.3.</strong></a>
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title="&lt;url>"><strong>3.3.</strong></a>
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title="section 3.3."><strong>3.3.</strong></a>
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<li>vh, <a href="#vh-unit" title=vh><strong>5.1.2.</strong></a>
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<li>vh, <a href="#vh-unit"
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title="section 5.1.2."><strong>5.1.2.</strong></a>
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<li>vmax, <a href="#vmax-unit" title=vmax><strong>5.1.2.</strong></a>
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<li>vmax, <a href="#vmax-unit"
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title="section 5.1.2."><strong>5.1.2.</strong></a>
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<li>vmin, <a href="#vmin-unit" title=vmin><strong>5.1.2.</strong></a>
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<li>vmin, <a href="#vmin-unit"
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title="section 5.1.2."><strong>5.1.2.</strong></a>
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<li>vw, <a href="#vw-unit" title=vw><strong>5.1.2.</strong></a>
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<li>vw, <a href="#vw-unit"
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title="section 5.1.2."><strong>5.1.2.</strong></a>
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</ul>
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<!--end-index-->

‎css3-values/Overview.src.html‎

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<p>Lengths refer to distance measurements and are denoted by
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<dfn id="length-value"><var>&lt;length></var></dfn> in the
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property definitions.
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A length is a <i>dimension</i>. A zero length may be represented
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instead as the <var>&lt;number></var> ''0''. (In other words,
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for zero lengths the unit identifier is optional.)</p>
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A length is a <i>dimension</i>.
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However, for zero lengths the unit identifier is optional
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(i.e. can be syntactically represented as the <var>&lt;number></var> ''0'').
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<p>A <dfn>dimension</dfn> is a <i>number</i> immediately followed by a
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unit identifier. It corresponds to the <code>DIMENSION</code> token in the

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