Better name for placement section, and give examples of start-of-sheet @-rules.

Author: dbaron

css3-conditional/Overview.html

@@ -170,8 +170,8 @@ <h2 class="no-num no-toc" id=contents>Table of contents</h2>
    <li><a href="#contents"><span class=secno>3. </span>Contents of
     conditional group rules</a>
 
-   <li><a href="#use"><span class=secno>4. </span>Use of conditional group
-    rules</a>
+   <li><a href="#use"><span class=secno>4. </span>Placement of conditional
+    group rules</a>
 
    <li><a href="#at-media"><span class=secno>5. </span>Media-specific style
     sheets: the &lsquo;<code class=css>@media</code>&rsquo; rule</a>
@@ -383,10 +383,10 @@ <h2 id=contents><span class=secno>3. </span>Contents of conditional group
   <p>A group rule body is allowed to contain rulesets and any @-rules that
    are allowed at the top level of a style sheet before and after a ruleset.
    This means that @-rules that must occur at the beginning of the style
-   sheet, such as &lsquo;<code class=css>@charset</code>&rsquo;, &lsquo;<code
+   sheet (such as &lsquo;<code class=css>@charset</code>&rsquo;, &lsquo;<code
    class=css>@import</code>&rsquo;, and &lsquo;<code
-   class=css>@namespace</code>&rsquo; are not allowed inside of conditional
-   group rules. Conditional group rules can be nested.
+   class=css>@namespace</code>&rsquo; rules) are not allowed inside of
+   conditional group rules. Conditional group rules can be nested.
 
   <p>In terms of the grammar, this specification defines the following
    productions for use in the grammar of conditional group rules:
@@ -428,17 +428,20 @@ <h2 id=contents><span class=secno>3. </span>Contents of conditional group
    (Rule sets, declaration blocks, and selectors)</a> of <a href="#CSS21"
    rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>.
 
-  <h2 id=use><span class=secno>4. </span>Use of conditional group rules</h2>
+  <h2 id=use><span class=secno>4. </span>Placement of conditional group rules</h2>
 
   <p>Conditional group rules are allowed at the top-level of a style sheet,
    and inside other conditional group rules. CSS processors
    <strong>must</strong> process such rules as <a
    href="#processing">described above</a>.
 
-  <p>Any rules that are not allowed after a ruleset are also not allowed
-   after a conditional group rule. Therefore, style sheets <strong>must
-   not</strong> place such rules after a conditional group rules, and CSS
-   processors <strong>must</strong> ignore such rules.
+  <p>Any rules that are not allowed after a ruleset (e.g., &lsquo;<code
+   class=css>@charset</code>&rsquo;, &lsquo;<code
+   class=css>@import</code>&rsquo;, or &lsquo;<code
+   class=css>@namespace</code>&rsquo; rules) are also not allowed after a
+   conditional group rule. Therefore, style sheets <strong>must not</strong>
+   place such rules after a conditional group rules, and CSS processors
+   <strong>must</strong> ignore such rules.
 
   <h2 id=at-media><span class=secno>5. </span>Media-specific style sheets:
    the &lsquo;<code class=css>@media</code>&rsquo; rule</h2>

css3-conditional/Overview.src.html

@@ -236,8 +236,8 @@ <h2 id="contents">Contents of conditional group rules</h2>
 <p>A group rule body is allowed to contain rulesets and any @-rules that
 are allowed at the top level of a style sheet before and after a
 ruleset.  This means that @-rules that must occur at the beginning of
-the style sheet, such as '@charset', '@import',
-and '@namespace' are not allowed inside of conditional group
+the style sheet (such as '@charset', '@import',
+and '@namespace' rules) are not allowed inside of conditional group
 rules.  Conditional group rules can be nested.</p>
 
 <p>In terms of the grammar, this specification defines the following
@@ -276,15 +276,16 @@ <h2 id="contents">Contents of conditional group rules</h2>
 href="http://www.w3.org/TR/CSS21/syndata.html#rule-sets">section 4.1.7
 (Rule sets, declaration blocks, and selectors)</a> of [[!CSS21]].</p>
 
-<h2 id="use">Use of conditional group rules</h2>
+<h2 id="use">Placement of conditional group rules</h2>
 
 <p>Conditional group rules are allowed at the top-level of a style
 sheet, and inside other conditional group rules.  CSS processors
 <strong>must</strong> process such rules as <a
 href="#processing">described above</a>.</p>
 
-<p>Any rules that are not allowed after a ruleset are also not allowed
-after a conditional group rule.  Therefore, style sheets <strong>must
+<p>Any rules that are not allowed after a ruleset (e.g., ''@charset'',
+''@import'', or ''@namespace'' rules) are also not allowed after a
+conditional group rule.  Therefore, style sheets <strong>must
 not</strong> place such rules after a conditional group rules, and CSS
 processors <strong>must</strong> ignore such rules.</p>