Fix the heading id, and put in hooks for things other than bgs to use <position>.

Author: tabatkins

css3-values/Overview.html

@@ -26,14 +26,14 @@
 
    <h1>CSS Values and Units Module Level 3</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 12 December
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 13 December
     2011</h2>
 
    <dl>
     <dt>This version:
 
     <dd><a
-     href="http://www.w3.org/TR/2011/ED-css3-values-20111212/">http://www.w3.org/TR/2011/ED-css3-values-20111212/</a>
+     href="http://www.w3.org/TR/2011/ED-css3-values-20111213/">http://www.w3.org/TR/2011/ED-css3-values-20111213/</a>
 
     <dt>Latest version:
 
@@ -258,8 +258,8 @@ <h2 class="no-num no-toc" id=contents>Table of contents</h2>
      <li><a href="#images"><span class=secno>7.2. </span> Images: the
       &lsquo;<code class=css>&lt;image&gt;</code>&rsquo; type</a>
 
-     <li><a href="#images"><span class=secno>7.3. </span> 2D Positioning: the
-      &lsquo;<code class=css>&lt;position&gt;</code>&rsquo; type</a>
+     <li><a href="#position"><span class=secno>7.3. </span> 2D Positioning:
+      the &lsquo;<code class=css>&lt;position&gt;</code>&rsquo; type</a>
     </ul>
 
    <li><a href="#functional-notation"><span class=secno>8. </span> Functional
@@ -1215,15 +1215,17 @@ <h3 id=images><span class=secno>7.2. </span> Images: the &lsquo;<a
    CSS Image Values Level 3 or its successor must interpret <a
    href="#image-value"><code>&lt;image&gt;</code></a> as defined therein.
 
-  <h3 id=images><span class=secno>7.3. </span> 2D Positioning: the &lsquo;<a
-   href="#position-value"><code class=css>&lt;position&gt;</code></a>&rsquo;
-   type</h3>
+  <h3 id=position><span class=secno>7.3. </span> 2D Positioning: the
+   &lsquo;<a href="#position-value"><code
+   class=css>&lt;position&gt;</code></a>&rsquo; type</h3>
 
   <p>The <dfn id=position-value><code>&lt;position&gt;</code></dfn> data type
    is defined herein as equivalent to the <a
    href="http://www.w3.org/TR/CSS21/colors.html#propdef-background-position"><code>&lt;'background-position'&gt;</code></a>
    syntax defined in <a href="#CSS21"
-   rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>. It is <a
+   rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>. It specifies the position of
+   a object area (e.g. background image) inside a positioning area (e.g.
+   background positioning area). It is <a
    href="http://www.w3.org/TR/css3-background/#the-background-position">extended</a>
    in <a href="#CSS3BG" rel=biblioentry>[CSS3BG]<!--{{!CSS3BG}}--></a>: UAs
    that support CSS Backgrounds &amp; Borders Level 3 or its successor must

css3-values/Overview.src.html

@@ -810,11 +810,11 @@ <h3 id="images">
 	[[!CSS3-IMAGES]]: UAs that support CSS Image Values Level 3 or its successor must interpret
 	<code>&lt;image&gt;</code> as defined therein.
 
-<h3 id="images">
+<h3 id="position">
 2D Positioning: the ''&lt;position&gt;'' type</h3>
 
 	<p>The <dfn id="position-value"><code>&lt;position&gt;</code></dfn> data type is
-	defined herein as equivalent to the <a href="http://www.w3.org/TR/CSS21/colors.html#propdef-background-position"><code>&lt;'background-position'&gt;</code></a> syntax defined in [[!CSS21]].
+	defined herein as equivalent to the <a href="http://www.w3.org/TR/CSS21/colors.html#propdef-background-position"><code>&lt;'background-position'&gt;</code></a> syntax defined in [[!CSS21]].  It specifies the position of a object area (e.g. background image) inside a positioning area (e.g. background positioning area).
 	It is <a href="http://www.w3.org/TR/css3-background/#the-background-position">extended</a> in
 	[[!CSS3BG]]: UAs that support CSS Backgrounds &amp; Borders Level 3 or its successor must interpret
 	<code>&lt;position&gt;</code> as defined therein.