[css-values] Mention Cascade's unset keyword as an example of a CSS-wide keyword defined elsewhere than 2.1

Author: fantasai

css-values/Overview.html

@@ -435,11 +435,9 @@ <h3 id=component-types><span class=secno>2.1. </span> Component value types</h3>
    comma (,) as literals. These represent their corresponding tokens.
 
   <p>All CSS properties also accept the <a href="#common-keywords">CSS-wide
-   keyword values</a> ‘<a href="#inherit"><code
-   class=css>inherit</code></a>’ and ‘<a href="#initial"><code
-   class=css>initial</code></a>’ as the sole component of their property
-   value. For readability these are not listed explicitly in the property
-   value syntax definitions. For example, the full value definition of <a
+   keyword values</a> as the sole component of their property value. For
+   readability these are not listed explicitly in the property value syntax
+   definitions. For example, the full value definition of <a
    href="http://www.w3.org/TR/css3-background/#border-color">‘<code
    class=property>border-color</code>’</a> is ‘<code class=css>[
    &lt;color>{1,4} ] | inherit | initial</code>’ (even though it is listed
@@ -656,9 +654,8 @@ <h4 id=common-keywords><span class=secno>3.1.1. </span> CSS-wide keywords:
    href="#inherit"><code class=css>inherit</code></a>’</h4>
 
   <p>As defined <a href="#component-types">above</a>, all properties accept
-   the ‘<a href="#initial"><code class=css>initial</code></a>’ and ‘<a
-   href="#inherit"><code class=css>inherit</code></a>’ keywords, which
-   represent value computations common to all CSS properties.
+   the <dfn id=css-wide-keywords>CSS-wide keywords</dfn>, which represent
+   value computations common to all CSS properties.
 
   <p>The <dfn id=inherit>‘<code class=css>inherit</code>’</dfn> keyword
    is <a
@@ -670,7 +667,10 @@ <h4 id=common-keywords><span class=secno>3.1.1. </span> CSS-wide keywords:
    initial value. <a href="#CSS3CASCADE"
    rel=biblioentry>[CSS3CASCADE]<!--{{CSS3CASCADE}}--></a>
 
-  <p>Other specifications might define additional CSS-wide keywords.
+  <p>Other CSS specifications can define additional CSS-wide keywords. For
+   example, <a href="#CSS3CASCADE"
+   rel=biblioentry>[CSS3CASCADE]<!--{{CSS3CASCADE}}--></a> adds an ‘<code
+   class=css>unset</code>’ keyword to this set.
    <!-- Make it easier to add CSS-wide keywords by defining a grammar production. -->
 
   <h3 id=custom-idents><span class=secno>3.2. </span> Author-defined
@@ -2335,8 +2335,8 @@ <h2 class=no-num id=changes>Changes</h2>
    Candidate Recommendation</a> are:
 
   <ul>
-   <li>Noted that the list of <i>CSS-wide keywords</i> may be expanded by
-    other specs.
+   <li>Noted that the list of <a href="#css-wide-keywords"><i>CSS-wide
+    keywords</i></a> may be expanded by other specs.
 
    <li>Clarified definition of ‘<a href="#ex-unit"><code
     class=css>ex</code></a>’ to refer to the “first available font”.
@@ -2500,6 +2500,9 @@ <h2 class=no-num id=index>Index</h2>
    <li><var>&lt;color></var>, <a href="#color-value"
     title="section 7.1."><strong>7.1.</strong></a>
 
+   <li>CSS-wide keywords, <a href="#css-wide-keywords"
+    title="section 3.1.1."><strong>3.1.1.</strong></a>
+
    <li><var>&lt;custom-ident></var>, <a href="#identifier-value"
     title="section 3.2."><strong>3.2.</strong></a>
 

css-values/Overview.src.html

@@ -161,7 +161,6 @@ <h3 id="component-types">
 	comma (,) as literals. These represent their corresponding tokens.
 
 	<p>All CSS properties also accept the <a href="#common-keywords">CSS-wide keyword values</a>
-	''inherit'' and ''initial''
 	as the sole component of their property value.
 	For readability these are not listed explicitly in the property value syntax definitions.
 	For example, the full value definition of <a href="http://www.w3.org/TR/css3-background/#border-color">'border-color'</a>
@@ -331,7 +330,7 @@ <h4 id="common-keywords">
 CSS-wide keywords: ''initial'' and ''inherit''</h4>
 
 	<p>As defined <a href="#component-types">above</a>,
-	all properties accept the ''initial'' and ''inherit'' keywords,
+	all properties accept the <dfn>CSS-wide keywords</dfn>,
 	which represent value computations common to all CSS properties.
 
 	<p>The <dfn>''inherit''</dfn> keyword is
@@ -341,7 +340,8 @@ <h4 id="common-keywords">
 	<p>The <dfn>''initial''</dfn> keyword represents the specified value that
 	is designated as the property's initial value. [[CSS3CASCADE]]
 
-	<p>Other specifications might define additional CSS-wide keywords.
+	<p>Other CSS specifications can define additional CSS-wide keywords.
+	For example, [[CSS3CASCADE]] adds an ''unset'' keyword to this set.
 	<!-- Make it easier to add CSS-wide keywords by defining a grammar production. -->
 
 <h3 id='custom-idents'>