[css3-gcpm] rework example 3 to make it clearer

Author: dauwhe

css-gcpm/Overview.html

@@ -54,7 +54,7 @@
 </p>
   <h1 class="p-name no-ref" id=title>CSS Generated Content for Paged Media Module</h1>
   <h2 class="no-num no-toc no-ref heading settled heading" id=subtitle><span class=content>Editor’s Draft,
-    <span class=dt-updated><span class=value-title title=20140131>31 January 2014</span></span></span></h2>
+    <span class=dt-updated><span class=value-title title=20140211>11 February 2014</span></span></span></h2>
   <div data-fill-with=spec-metadata><dl><dt>This version:<dd><a class=u-url href=http://dev.w3.org/csswg/css-gcpm/>http://dev.w3.org/csswg/css-gcpm/</a><dt>Editor’s Draft:<dd><a href=http://dev.w3.org/csswg/css-gcpm/>http://dev.w3.org/csswg/css-gcpm/</a><dt>Previous Versions:<dd><a href=https://dvcs.w3.org/hg/csswg/raw-file/6a5c44d11c2b/css-gcpm/Overview.html rel=previous>https://dvcs.w3.org/hg/csswg/raw-file/6a5c44d11c2b/css-gcpm/Overview.html</a><dd><a href=http://www.w3.org/TR/2011/WD-css3-gcpm-20111129/ rel=previous>http://www.w3.org/TR/2011/WD-css3-gcpm-20111129/</a>
     <dt>Feedback:</dt>
         <dd><a href="mailto:www-style@w3.org?subject=%5Bcss-gcpm%5D%20feedback">www-style@w3.org</a>
@@ -301,18 +301,18 @@ <h4 class="heading settled heading" data-level=1.1.2 id=string-function><span cl
    margin: 1.5cm;
 
    @top-left {
-   content: "first: " string(title, first); 
+   content: "first: " string(heading, first); 
    }
    @top-center {
-   content: "start: " string(title, start); 
+   content: "start: " string(heading, start); 
    }
     @top-right {
-    content: "last: " string(title, last); 
+    content: "last: " string(heading, last); 
    }
   }
 
-h2 { string-set: title content() }
-</pre><p>The following figures show the first, start, and last assignments on various pages.
+h2 { string-set: heading content() }
+</pre><p>The following figures show the first, start, and last assignments of the “heading” string on various pages.
 </p><figure>
 <img alt="" src=using-strings-1.jpg width=480>
 <figcaption>The <a href=#string-start>start</a> value is empty, as the string had not yet been set at the start of the page.</figcaption>

css-gcpm/Overview.src.html

@@ -160,19 +160,19 @@ <h4 id="string-function">
    margin: 1.5cm;
 
    @top-left {
-   content: "first: " string(title, first); 
+   content: "first: " string(heading, first); 
    }
    @top-center {
-   content: "start: " string(title, start); 
+   content: "start: " string(heading, start); 
    }
     @top-right {
-    content: "last: " string(title, last); 
+    content: "last: " string(heading, last); 
    }
   }
 
-h2 { string-set: title content() }
+h2 { string-set: heading content() }
 </pre>
-The following figures show the first, start, and last assignments on various pages.
+The following figures show the first, start, and last assignments of the “heading” string on various pages.
 <figure>
 <img src="using-strings-1.jpg" width="480" alt=""/>
 <figcaption>The <a href="#string-start">start</a> value is empty, as the string had not yet been set at the start of the page.</figcaption>