[css-values] Link to 'first available font'

Author: fantasai

css-values/Overview.html

@@ -11,12 +11,12 @@
    rel=dcterms.rights>
   <meta content="CSS Values and Units Module Level 3" name=dcterms.title>
   <meta content=text name=dcterms.type>
-  <meta content=2013-07-08 name=dcterms.date>
+  <meta content=2013-07-10 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>
   <meta content=W3C name=dcterms.publisher>
-  <meta content="http://www.w3.org/TR/2013/CR-css3-values-20130708/"
+  <meta content="http://www.w3.org/TR/2013/CR-css3-values-20130710/"
    name=dcterms.identifier>
   <style type="text/css">
     code, small { white-space: nowrap }
@@ -42,14 +42,14 @@
    <h1 class=p-name>CSS Values and Units Module Level 3</h1>
 
    <h2 class="no-num no-toc" id=longstatus-date>W3C Candidate Recommendation
-    <span class=dt-updated><span class=value title=20130708> 8 July
+    <span class=dt-updated><span class=value title=20130710>10 July
     2013</span></span></h2>
 
    <dl>
     <dt>This version:
 
     <dd><a class=u-url
-     href="http://www.w3.org/TR/2013/CR-css3-values-20130708/">http://www.w3.org/TR/2013/CR-css3-values-20130708/</a>
+     href="http://www.w3.org/TR/2013/CR-css3-values-20130710/">http://www.w3.org/TR/2013/CR-css3-values-20130710/</a>
 
     <dt>Latest version:
 
@@ -976,8 +976,8 @@ <h4 id=font-relative-lengths><span class=secno>5.1.1. </span> Font-relative
 
   <p>Aside from ‘<a href="#rem-unit"><code class=css>rem</code></a>’
    (which refers to the font-size of the root element), the font-relative
-   lengths refer to the computed font metrics of the element on which they
-   are used. The exception is when they occur in the value of the ‘<code
+   lengths refer to the font metrics of the element on which they are used.
+   The exception is when they occur in the value of the ‘<code
    class=property>font-size</code>’ property itself, in which case they
    refer to the computed font metrics of the parent element (or the computed
    font metrics corresponding to the initial values of the ‘<code
@@ -1010,10 +1010,13 @@ <h4 id=font-relative-lengths><span class=secno>5.1.1. </span> Font-relative
    <dt><dfn id=ex-unit title=ex>ex unit</dfn>
 
    <dd>
-    <p>Equal to the font's x-height. The x-height is so called because it is
-     often equal to the height of the lowercase "x". However, an ‘<a
-     href="#ex-unit"><code class=css>ex</code></a>’ is defined even for
-     fonts that do not contain an "x".
+    <p>Equal to the used x-height of the <a
+     href="http://www.w3.org/TR/css3-fonts/#first-available-font">first
+     available font</a>. <a href="#CSS3-FONTS"
+     rel=biblioentry>[CSS3-FONTS]<!--{{!CSS3-FONTS}}--></a> The x-height is
+     so called because it is often equal to the height of the lowercase "x".
+     However, an ‘<a href="#ex-unit"><code class=css>ex</code></a>’ is
+     defined even for fonts that do not contain an "x".
 
     <p>The x-height of a font can be found in different ways. Some fonts
      contain reliable metrics for the x-height. If reliable font metrics are
@@ -1027,8 +1030,8 @@ <h4 id=font-relative-lengths><span class=secno>5.1.1. </span> Font-relative
    <dt><dfn id=ch-unit title=ch>ch unit</dfn>
 
    <dd>
-    <p>Equal to the advance measure of the "0" (ZERO, U+0030) glyph found in
-     the font used to render it.
+    <p>Equal to the used advance measure of the "0" (ZERO, U+0030) glyph
+     found in the font used to render it.
 
    <dt><dfn id=rem-unit title=rem>rem unit</dfn>
 
@@ -2302,7 +2305,7 @@ <h3 class=no-num id=cr-exit-criteria> CR exit criteria</h3>
   <h2 class=no-num id=changes>Changes</h2>
 
   <p>Changes since the <a
-   href="http://www.w3.org/TR/2012/CR-css3-values-20120828/">28 August
+   href="http://www.w3.org/TR/2012/CR-css3-values-20120828/">28 August 2012
    Candidate Recommendation</a> are:
 
   <ul>
@@ -2336,6 +2339,15 @@ <h2 class=no-num id=changes>Changes</h2>
     other specs.
   </ul>
 
+  <p>Changes since the <a
+   href="http://www.w3.org/TR/2013/CR-css3-values-20130404/">4 April 2013
+   Candidate Recommendation</a> are:
+
+  <ul>
+   <li>Clarified definition of ‘<a href="#ex-unit"><code
+    class=css>ex</code></a>’ to refer to the “first available font”.
+  </ul>
+
   <h2 class=no-num id=references>References</h2>
 
   <h3 class=no-num id=normative-references>Normative references</h3>
@@ -2356,6 +2368,16 @@ <h3 class=no-num id=normative-references>Normative references</h3>
    </dd>
    <!---->
 
+   <dt id=CSS3-FONTS>[CSS3-FONTS]
+
+   <dd>John Daggett. <a
+    href="http://www.w3.org/TR/2013/WD-css3-fonts-20130212/"><cite>CSS Fonts
+    Module Level 3.</cite></a> 12 February 2013. W3C Working Draft. (Work in
+    progress.) URL: <a
+    href="http://www.w3.org/TR/2013/WD-css3-fonts-20130212/">http://www.w3.org/TR/2013/WD-css3-fonts-20130212/</a>
+   </dd>
+   <!---->
+
    <dt id=CSS3-IMAGES>[CSS3-IMAGES]
 
    <dd>Elika J. Etemad; Tab Atkins Jr. <a

css-values/Overview.src.html

@@ -594,7 +594,7 @@ <h4 id="font-relative-lengths">
 Font-relative lengths: the ''em'', ''ex'', ''ch'', ''rem'' units</h4>
 
 	<p>Aside from ''rem'' (which refers to the font-size of the root element),
-	the font-relative lengths refer to the computed font metrics of the
+	the font-relative lengths refer to the font metrics of the
 	element on which they are used.
 	The exception is when they occur in the value of the 'font-size' property
 	itself, in which case they refer to the computed font metrics of the parent element
@@ -618,9 +618,9 @@ <h4 id="font-relative-lengths">
 		</div>
 
 		<dt><dfn title="ex">ex unit</dfn>
-		<dd><p>Equal to the font's x-height. The x-height is so called because
-		it is often equal to the height of the lowercase "x". However, an
-		''ex'' is defined even for fonts that do not contain an "x".
+		<dd><p>Equal to the used x-height of the <a href="http://www.w3.org/TR/css3-fonts/#first-available-font">first available font</a>. [[!CSS3-FONTS]]
+		The x-height is so called because it is often equal to the height of the lowercase "x".
+		However, an ''ex'' is defined even for fonts that do not contain an "x".
 		<p>The x-height of a font can be found in different ways. Some fonts
 		contain reliable metrics for the x-height. If reliable font metrics
 		are not available, UAs may determine the x-height from the height
@@ -631,7 +631,7 @@ <h4 id="font-relative-lengths">
 		a value of 0.5em must be assumed.
 
 		<dt><dfn title="ch">ch unit</dfn>
-		<dd><p>Equal to the advance measure of the "0" (ZERO, U+0030) glyph
+		<dd><p>Equal to the used advance measure of the "0" (ZERO, U+0030) glyph
 		found in the font used to render it.
 
 		<dt><dfn title="rem">rem unit</dfn>
@@ -1782,7 +1782,7 @@ <h3 class="no-num" id="cr-exit-criteria">
 
 <h2 class="no-num" id="changes">Changes</h2>
 
-  <p>Changes since the <a href="http://www.w3.org/TR/2012/CR-css3-values-20120828/">28 August Candidate Recommendation</a> are:
+  <p>Changes since the <a href="http://www.w3.org/TR/2012/CR-css3-values-20120828/">28 August 2012 Candidate Recommendation</a> are:
 
   <ul>
     <li>Corrected <code>wqname</code> in the ''attr()'' syntax to <code>qname</code>
@@ -1797,6 +1797,12 @@ <h2 class="no-num" id="changes">Changes</h2>
     <li>Specified that the list of <i>CSS-wide keywords</i> may be expanded by other specs.
   </ul>
 
+  <p>Changes since the <a href="http://www.w3.org/TR/2013/CR-css3-values-20130404/">4 April 2013 Candidate Recommendation</a> are:
+
+  <ul>
+    <li>Clarified definition of ''ex'' to refer to the “first available font”.
+  </ul>
+
 <h2 class="no-num" id="references">References</h2>
 
 <h3 class="no-num">Normative references</h3>