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1558<link rel='icon' sizes=''>2008-05-08 02:17
Index: source
--- source	(revision 1557)
+++ source	(revision 1558)
@@ -5899,6 +5899,7 @@
    <dd><code title="attr-link-media">media</code></dd>
    <dd><code title="attr-link-hreflang">hreflang</code></dd>
    <dd><code title="attr-link-type">type</code></dd>
+   <dd><code title="attr-link-sizes">sizes</code></dd>
    <dd>Also, the <code title="attr-link-title">title</code> attribute has special semantics on this element.</dd>
    <dt>DOM interface:</dt>
@@ -5910,6 +5911,7 @@
            attribute DOMString <span title="dom-link-media">media</span>;
            attribute DOMString <span title="dom-link-hreflang">hreflang</span>;
            attribute DOMString <span title="dom-link-type">type</span>;
+           attribute DOMString <span title="dom-link-sizes">sizes</span>;
     <p>The <code>LinkStyle</code> interface must also be implemented
     by this element, the <span>styling processing model</span> defines
@@ -6102,6 +6104,12 @@
   elements in that a link without a title does not inherit the title
   of the parent element: it merely has no title.</p>
+  <p>The <code title="attr-link-sizes">sizes</code> attribute is used
+  with the <code title="rel-icon">icon</code> link type. The attribute
+  must not be specified on <code>link</code> elements that do not have
+  a <code title="attr-link-rel">rel</code> attribute that specifies
+  the <code title="rel-icon">icon</code> keyword.</p>
   <p>Some versions of HTTP defined a <code title="">Link:</code>
   header, to be processed like a series of <code>link</code> elements.
   When processing links, those must be taken into consideration as
@@ -6120,7 +6128,8 @@
   title="dom-link-rel"><code>rel</code></dfn>, <dfn
   title="dom-link-media"><code>media</code></dfn>, <dfn
   title="dom-link-hreflang"><code>hreflang</code></dfn>, and <dfn
-  title="dom-link-type"><code>type</code></dfn> each must
+  title="dom-link-type"><code>type</code></dfn>, and <dfn
+  title="dom-link-sizes"><code>sizes</code></dfn> each must
   <span>reflect</span> the respective content attributes of the same
@@ -32437,13 +32446,80 @@
   <p>Icons could be auditory icons, visual icons, or other kinds of
   icons. If multiple icons are provided, the user agent must select
   the most appropriate icon according to the <code
-  title="attr-link-media">media</code> attribute.</p>
+  title="attr-link-media">media</code> and <code
+  title="attr-link-sizes">sizes</code> attributes. If there are
+  multiple equally appropriate icons, user agents must use the first
+  one declared in <span>tree order</span>.</p>
   <p>There is no default type for resources given by the <code
   title="rel-icon">icon</code> keyword.</p> <!-- XXX we don't define
   the content-type sniffing for this keyword -->
+  <p>The <dfn title="attr-link-sizes"><code>sizes</code></dfn>
+  attribute gives the sizes of icons for visual media.</p>
+  <p>If the specified, the attribute must have a value that is an
+  <span>unordered set of unique space-separated tokens</span>. The
+  values must all be either <code
+  title="attr-link-sizes-any">any</code> or a value that consists of
+  two <span title="valid non-negative integer">valid non-negative
+  integers</span> that do not have a leading U+0030 DIGIT ZERO (0)
+  character and that are separated by a single U+0078 LATIN SMALL
+  LETTER X character.</p>
+  <p>The keywords represent icon sizes.</p>
+  <p>To parse and process the attribute's value, the user agent must
+  first <span title="split a string on spaces">split the attribute's
+  value on spaces</span>, and must then parse each resulting keyword
+  to determine what it represents.</p>
+  <p>The <dfn title="attr-link-sizes-any"><code>any</code> keyword
+  represents that the resource contains a scalable icon, e.g. as
+  provided by an SVG image.</p>
+  <p>Other keywords must be further parsed as follows to determine
+  what they represent:</p>
+  <ul>
+   <li><p>If the keyword doesn't contain exactly one U+0078 LATIN
+   SMALL LETTER X character, then this keyword doesn't represent
+   anything. Abort these steps for that keyword.</p></li>
+   <li><p>Let <var title="">width string</var> be the string before
+   the "<code title="">x</code>".</p></li>
+   <li><p>Let <var title="">hight string</var> be the string after the
+   "<code title="">x</code>".</p></li>
+   <li><p>If either <var title="">width string</var> or <var
+   title="">height string</var> start with a U+0030 DIGIT ZERO (0)
+   character or contain any characters other than characters in the
+   range U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9), then this
+   keyword doesn't represent anything. Abort these steps for that
+   keyword.</p></li>
+   <li><p>Apply the <span>rules for parsing non-negative
+   integers</span> to <var title="">width string</var> to obtain <var
+   title="">width</var>.</p></li>
+   <li><p>Apply the <span>rules for parsing non-negative
+   integers</span> to <var title="">height string</var> to obtain <var
+   title="">height</var>.</p></li>
+   <li><p>The keyword represents that the resource contains a bitmap
+   icon with a width of <var title="">width</var> device pixels and a
+   height of <var title="">height</var> device pixels.</p></li>
+  </ul>
+  <p>The keywords specified on the <code
+  title="attr-link-sizes">sizes</code> attribute must not represent
+  icon sizes that are not actually available in the linked
+  resource.</p>
   <h5>Link type "<dfn title="rel-license"><code>license</code></dfn>"</h5>
   <p>The <code title="rel-license">license</code> keyword may be used