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Address various editorial nits.
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css3-values/Overview.html

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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 July 2012</h2>
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<h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 17 July 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-20120716/">http://www.w3.org/TR/2012/ED-css3-values-20120716/</a>
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href="http://www.w3.org/TR/2012/ED-css3-values-20120717/">http://www.w3.org/TR/2012/ED-css3-values-20120717/</a>
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<dt>Latest version:
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@@ -394,14 +394,21 @@ <h3 id=component-types><span class=secno>2.1. </span> Component value types</h3>
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<p>Some property value definitions also include the slash (/) and/or the
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comma (,) as literals. These represent their corresponding tokens.
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<p>All CSS properties also accept the keyword values ‘<a
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href="#inherit"><code class=css>inherit</code></a>’ and ‘<a
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href="#initial"><code class=css>initial</code></a>’ as their property
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value, but for readability these are not listed explicitly in the property
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value syntax definitions. These keywords cannot be combined with other
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component values in same declaration; such a declaration is invalid. For
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example, ‘<code class=css>background: url(corner.png) no-repeat,
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inherit;</code>’ is invalid.
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<p>All CSS properties also accept the <a href="#common-keywords">CSS-wide
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keyword values</a><a href="#inherit"><code
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class=css>inherit</code></a>’ and ‘<a href="#initial"><code
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class=css>initial</code></a>’ as the sole component of their property
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value. For readability these are not listed explicitly in the property
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value syntax definitions. For example, the full value definition of <a
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href="http://www.w3.org/TR/css3-background/#border-color"><code
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class=property>border-color</code></a> is ‘<code class=css>[
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&lt;color>{1,4} ] | inherit | initial</code>’ (even though it is listed
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as ‘<code class=css>&lt;color>{1,4}</code>’).
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<p class=note> Note: This implies that, in general, combining these
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keywords with other component values in the same declaration results in an
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invalid declaration. For example, ‘<code class=css>background:
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url(corner.png) no-repeat, inherit;</code>’ is invalid.
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<h3 id=component-combinators><span class=secno>2.2. </span> Component value
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combinators</h3>
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<pre>
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<!----> a b | c || d && e f
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<!---->[ a b ] | [ c || [ d && [ e f ]]]</pre>
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<!--
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<p>
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White space is allowed, but optional, between components of a combination.
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-->
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<h3 id=component-multipliers><span class=secno>2.3. </span> Component value
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multipliers</h3>
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<li>A hash mark (#) indicates that the preceding type, word, or group
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occurs one or more times, separated by comma tokens.
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</ul>
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<!--
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<p>
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White space is allowed, but optional, between repetitions
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and around the comma separator of ''#''-multiplied lists.
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-->
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<p>For repeated component values (indicated by ‘<code
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class=css>*</code>’, ‘<code class=css>+</code>’, or ‘<code
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<h3 id=component-whitespace><span class=secno>2.4. </span> Component values
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and white space</h3>
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<p>Component values are specified in terms of tokens, as described in <a
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href="http://www.w3.org/TR/CSS21/syndata.html#tokenization">Chapter 4</a>
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of <a href="#CSS21" rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>. As the
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grammar allows spaces between tokens in the components of the
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<code>value</code> production, spaces may appear between components in
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property values.
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<p>Unless otherwise specified, white space and/or comments may appear
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before, after, and/or between components in a property value or
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subcomponents in a <a href="#functional-notation">functional notation</a>
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that is defined using these component <a
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href="#component-combinators">combinators</a> and <a
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href="#component-multipliers">multipliers</a>.
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<p class=note>Note: In many cases, spaces will in fact be <em>required</em>
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between components in order to distinguish them from each other. For
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initial value. <a href="#CSS3CASCADE"
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rel=biblioentry>[CSS3CASCADE]<!--{{CSS3CASCADE}}--></a>
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<p class=note> The <dfn id=default><code
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<p class=note> Note, the <dfn id=default><code
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class=css>default</code></dfn> keyword is reserved for future use.
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<h3 id=strings><span class=secno>3.2. </span> Quoted Strings: the ‘<a
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<p>In order to create modular style sheets that are not dependent on the
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absolute location of a resource, authors should use relative URIs.
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Relative URIs (as defined in <a href="#URI"
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rel=biblioentry>[URI]<!--{{URI}}--></a>) are resolved to full URIs using a
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base URI. RFC 3986, section 3, defines the normative algorithm for this
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process. For CSS style sheets, the base URI is that of the style sheet,
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not that of the source document.
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rel=biblioentry>[URI]<!--{{!URI}}--></a>) are resolved to full URIs using
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a base URI. RFC 3986, section 3, defines the normative algorithm for
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this process. For CSS style sheets, the base URI is that of the style
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sheet, not that of the source document.
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<p>When a <a href="#url-value"><i>&lt;url></i></a> appears in the computed
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value of a property, it is resolved to an absolute URL, as described in
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corresponds to a subset of the <a href="#number"><code>NUMBER</code></a>
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token in the <a
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href="http://www.w3.org/TR/CSS21/syndata.html#tokenization">grammar</a>.
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Integers may be immediately preceded by ‘<code class=css>-</code>’ or
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<code class=css>+</code>’ to indicate the sign.
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The first digit of an integer may be immediately preceded by ‘<code
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class=css>-</code>’ or ‘<code class=css>+</code>’ to indicate the
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integer's sign.
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<h3 id=numbers><span class=secno>4.2. </span> Numbers: the ‘<a
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href="#number-value"><code class=css>&lt;number></code></a>’ type</h3>
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<p>Number values are denoted by <dfn
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id=number-value><var>&lt;number></var></dfn>. A <dfn
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id=number>number</dfn> is either an <a
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href="#integer-value"><var>&lt;integer></var></a>, or zero or more decimal
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id=number>number</dfn> is either an &lt;integer> or zero or more decimal
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digits followed by a dot (.) followed by one or more decimal digits. It
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corresponds to the <a href="#number"><code>NUMBER</code></a> token in the
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<a
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href="http://www.w3.org/TR/CSS21/syndata.html#tokenization">grammar</a>.
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Like integers, numbers may also be immediately preceded by ‘<code
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class=css>-</code>’ or<code class=css>+</code>to indicate the
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sign.
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As with integers, the first character of a number may be immediately
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preceded by<code class=css>-</code>or ‘<code
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class=css>+</code>’ to indicate the number's sign.
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<h3 id=percentages><span class=secno>4.3. </span> Percentages: the ‘<a
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href="#percentage-value"><code class=css>&lt;percentage></code></a>
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<h2 id=functional-notation><span class=secno>8. </span> Functional
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Notations</h2>
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<p>Some values use a <dfn id=functional-notation0>functional notation</dfn>
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to type values and to lump values together. The syntax starts with the
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name of the function immediately followed by a left parenthesis followed
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by the argument(s) to the notation followed by a right parenthesis. If a
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function takes a list of arguments, the arguments are separated by a comma
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(‘<code class=css>,</code>’) with optional whitespace before and after
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the comma.
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<p> A <dfn id=functional-notation0>functional notation</dfn> is a type of
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component value that can represent more complex types or invoke special
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processing. The syntax starts with the name of the function immediately
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followed by a left parenthesis (i.e. a <code>FUNCTION</code> token)
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followed by the argument(s) to the notation followed by a right
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parenthesis. White space is allowed, but optional, immediately inside the
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parentheses. If a function takes a list of arguments, the arguments are
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separated by a comma (‘<code class=css>,</code>’) with optional
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whitespace before and after the comma.
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<pre class=example>
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<!-- -->background: url(http://www.example.org/image);
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href="http://dev.w3.org/csswg/css3-namespace/#css-qnames">CSS qualified
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name</a> (the wqname production in <a href="#CSS3NAMESPACE"
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rel=biblioentry>[CSS3NAMESPACE]<!--{{!CSS3NAMESPACE}}--></a>) that
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represents an attribute name. <span class=note>Most of the time, this will
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just be an identifier.</span>
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represents an attribute name. (In the absence of namespacing, this will
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just be a CSS identifier.)
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<p> The optional <var>&lt;type-or-unit></var> argument is a keyword drawn
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from the list below that tells the UA how to interpret the attribute
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property. If it's absent, the default value for the given
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<var>&lt;type-or-unit></var> (from the list below) is implied.
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<p class=note> Note that, unlike ‘<a href="#toggle"><code
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class=css>toggle()</code></a><var>&lt;value></var>s, an ‘<a
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href="#attr"><code class=css>attr()</code></a><var>&lt;fallback></var>
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value may contain top-level commas, as it is always the last argument in
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the functional notation.
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<p> The attr() expression is only valid if:
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<ul>
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}
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metal {
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background: silver url(metal.png);
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}
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}</pre>
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</div>
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<!--
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/* this also uses a possible extension to the 'content' property
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to handle replaced content and alternatives to unavailable,
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corrupted or unsupported content */
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img {
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content: replaced attr(src url), attr(alt string, none);
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height: attr(height px, auto);
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width: attr(width px, auto);
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}</pre>
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</div>
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}-->
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<div class="illegal example">
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<p>All of the following examples are invalid and would cause a parse-time
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href="http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>
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</dd>
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<!---->
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<dt id=URI>[URI]
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<dd>T. Berners-Lee; R. Fielding; L. Masinter. <a
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href="http://www.ietf.org/rfc/rfc3986.txt"><cite>Uniform Resource
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Identifiers (URI): generic syntax.</cite></a> January 2005. Internet RFC
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3986. URL: <a
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href="http://www.ietf.org/rfc/rfc3986.txt">http://www.ietf.org/rfc/rfc3986.txt</a>
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</dd>
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<!---->
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</dl>
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<!--end-normative-->
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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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<dt id=URI>[URI]
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<dd>T. Berners-Lee; R. Fielding; L. Masinter. <a
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href="http://www.ietf.org/rfc/rfc3986.txt"><cite>Uniform Resource
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Identifiers (URI): generic syntax.</cite></a> January 2005. Internet RFC
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3986. URL: <a
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href="http://www.ietf.org/rfc/rfc3986.txt">http://www.ietf.org/rfc/rfc3986.txt</a>
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</dd>
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<!---->
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</dl>
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<!--end-informative-->
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