[css-values] Relax unnecessary restrictions on <custom-ident> per <http://lists.w3.org/Archives/Public/www-style/2014Mar/0120.html>.

Author: fantasai

css-values/Overview.html

@@ -11,7 +11,7 @@
    rel=dcterms.rights>
   <meta content="CSS Values and Units Module Level 3" name=dcterms.title>
   <meta content=text name=dcterms.type>
-  <meta content=2013-12-18 name=dcterms.date>
+  <meta content=2014-03-06 name=dcterms.date>
   <meta content="Håkon Wium Lie" name=dcterms.creator>
   <meta content="Tab Atkins" name=dcterms.creator>
   <meta content="Elika J. Etemad" name=dcterms.creator>
@@ -42,11 +42,11 @@
    <h1 class=p-name>CSS Values and Units Module Level 3</h1>
 
    <h2 class="no-num no-toc">Editor's Draft <span class=dt-updated><span
-    class=value title=20131218>18 December 2013</span></span></h2>
+    class=value title=20140306> 6 March 2014</span></span></h2>
 
    <dl>
     <dt>This version:</dt>
-    <!--<dd><a class="u-url" href="http://dev.w3.org/csswg/css-values/">http://www.w3.org/TR/2013/CR-css3-values-20131218/</a></dd>-->
+    <!--<dd><a class="u-url" href="http://dev.w3.org/csswg/css-values/">http://www.w3.org/TR/2014/CR-css3-values-20140306/</a></dd>-->
 
     <dd><a class=u-url
      href="http://dev.w3.org/csswg/css-values/">http://dev.w3.org/csswg/css-values/</a>
@@ -97,7 +97,7 @@ <h2 class="no-num no-toc">Editor's Draft <span class=dt-updated><span
    <!--begin-copyright-->
    <p class=copyright><a
     href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright"
-    rel=license>Copyright</a> © 2013 <a href="http://www.w3.org/"><abbr
+    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
@@ -680,19 +680,35 @@ <h3 id=custom-idents><span class=secno>3.2. </span> Author-defined
   <p> Some properties accept arbitrary author-defined identifiers as a
    component value. This generic data type is denoted by <dfn
    id=identifier-value><var>&lt;custom-ident></var></dfn>, and represents any
-   valid CSS <a href="#identifier"><i>identifier</i></a> that does not
-   otherwise appear as a pre-defined keyword in that property's value
+   valid CSS <a href="#identifier"><i>identifier</i></a> that would not be
+   misinterpreted as a pre-defined keyword in that property's value
    definition. Such identifiers are fully case-sensitive, even in the ASCII
    range (e.g. ‘<code class=css>example</code>’ and ‘<code
    class=css>EXAMPLE</code>’ are two different, unrelated user-defined
    identifiers).
 
   <p> The <a href="#common-keywords">CSS-wide keywords</a> are not valid <a
-   href="#identifier-value"><var>&lt;custom-ident>s</var></a>. The ‘<code
+   href="#identifier-value"><var>&lt;custom-ident></var></a>s. The ‘<code
    class=css>default</code>’ keyword is reserved and is also not a valid <a
-   href="#identifier-value"><var>&lt;custom-ident>s</var></a>.
-
-  <p> Reserved keywords are reserved in all ASCII case permutations.
+   href="#identifier-value"><var>&lt;custom-ident></var></a>.
+
+  <p> Specifications using ‘<a href="#identifier-value"><code
+   class=css>&lt;custom-ident></code></a>’ should specify clearly what
+   other keywords are excluded from <a
+   href="#identifier-value"><var>&lt;custom-ident></var></a>—for example by
+   saying that any pre-defined keywords in that property's value definition
+   are excluded. As a general rule, an identifier that could be interpreted
+   as a pre-defined keyword in any position or multiplication of the <a
+   href="#identifier-value"><var>&lt;custom-ident></var></a> component value
+   is excluded, and is invalid as a <a
+   href="#identifier-value"><var>&lt;custom-ident></var></a> matching to that
+   component value even in positions where its use would be technically
+   unambiguous. For example, if a keyword could be misparsed when specified
+   as the first item of a ‘<a href="#identifier-value"><code
+   class=css><var>&lt;custom-ident></var>+</code></a>’ list, it is invalid
+   when specified in any position in that list.
+
+  <p> Excluded keywords are excluded in all ASCII case permutations.
 
   <h3 id=strings><span class=secno>3.3. </span> Quoted Strings: the ‘<a
    href="#string-value"><code class=css>&lt;string></code></a>’ type</h3>
@@ -2440,10 +2456,10 @@ <h3 class=no-num id=normative-references>Normative references</h3>
    <dt id=ref-CSS3BG>[CSS3BG]
 
    <dd>Bert Bos; Elika J. Etemad; Brad Kemper. <a
-    href="http://www.w3.org/TR/2012/CR-css3-background-20120724/"><cite>CSS
-    Backgrounds and Borders Module Level 3.</cite></a> 24 July 2012. W3C
-    Candidate Recommendation. (Work in progress.) URL: <a
-    href="http://www.w3.org/TR/2012/CR-css3-background-20120724/">http://www.w3.org/TR/2012/CR-css3-background-20120724/</a>
+    href="http://www.w3.org/TR/2014/WD-css3-background-20140204/"><cite>CSS
+    Backgrounds and Borders Module Level 3.</cite></a> 4 February 2014. W3C
+    Last Call Working Draft. (Work in progress.) URL: <a
+    href="http://www.w3.org/TR/2014/WD-css3-background-20140204/">http://www.w3.org/TR/2014/WD-css3-background-20140204/</a>
    </dd>
    <!---->
 

css-values/Overview.src.html

@@ -358,18 +358,31 @@ <h3 id='custom-idents'>
 		Some properties accept arbitrary author-defined identifiers as a component value.
 		This generic data type is denoted by <dfn id="identifier-value"><var>&lt;custom-ident></var></dfn>,
 		and represents any valid CSS <i>identifier</i>
-		that does not otherwise appear as a pre-defined keyword in that property's value definition.
+		that would not be misinterpreted as a pre-defined keyword in that property's value definition.
 		Such identifiers are fully case-sensitive,
 		even in the ASCII range
 		(e.g. ''example'' and ''EXAMPLE'' are two different, unrelated user-defined identifiers).
 
 	<p>
-		The <a href='#common-keywords'>CSS-wide keywords</a> are not valid <var>&lt;custom-ident>s</var>.
+		The <a href='#common-keywords'>CSS-wide keywords</a> are not valid <var>&lt;custom-ident></var>s.
 		The ''default'' keyword is reserved
-		and is also not a valid <var>&lt;custom-ident>s</var>.
+		and is also not a valid <var>&lt;custom-ident></var>.
 
 	<p>
-		Reserved keywords are reserved in all ASCII case permutations.
+		Specifications using ''&lt;custom-ident>'' should specify clearly
+		what other keywords are excluded from <var>&lt;custom-ident></var>&mdash;for
+		example by saying that any pre-defined keywords in that property's value definition are excluded.
+		As a general rule, an identifier that could be interpreted as a pre-defined keyword
+		in any position or multiplication of the <var>&lt;custom-ident></var> component value
+		is excluded,
+		and is invalid as a <var>&lt;custom-ident></var> matching to that component value
+		even in positions where its use would be technically unambiguous.
+		For example, if a keyword could be misparsed when specified
+		as the first item of a ''<var>&lt;custom-ident></var>+'' list,
+		it is invalid when specified in any position in that list.
+
+	<p>
+		Excluded keywords are excluded in all ASCII case permutations.
 
 
 <h3 id="strings">