map empty string ns to no ns, since XML and DOM don't distinguish either

Author: fantasai

css3-namespace/Overview.html

@@ -15,11 +15,11 @@
 
    <h1 id=css-namespaces>CSS Namespaces Module</h1>
 
-   <h2 class="no-num no-toc" id=longstatus>Editor's Draft 16 February 2008</h2>
+   <h2 class="no-num no-toc" id=longstatus>Editor's Draft 19 February 2008</h2>
 
    <dl>
     <dt>This version:</dt>
-    <!--    <dd><a href="http://www.w3.org/TR/2008/WD-css3-namespace-20080216/">http://www.w3.org/TR/2008/WD-css3-namespace-20080216/</a></dd> -->
+    <!--    <dd><a href="http://www.w3.org/TR/2008/WD-css3-namespace-20080219/">http://www.w3.org/TR/2008/WD-css3-namespace-20080219/</a></dd> -->
 
     <dd><a
      href="http://dev.w3.org/csswg/css3-namespace/">http://dev.w3.org/csswg/css3-namespace/</a>
@@ -351,8 +351,9 @@ <h2 id=css-qnames><span class=secno>4. </span>CSS Qualified Names</h2>
     separated by a "vertical bar" (<code>|</code>, U+007C). The prefix,
     representing the namespace for which it has been declared, indicates the
     namespace of the local name. The prefix of a qualified name may be
-    omitted to indicate that the name belongs to no namespace. Some contexts
-    may allow the use of an asterisk (<code>*</code>, U+002A) as a wildcard
+    omitted to indicate that the name belongs to no namespace, i.e. that the
+    namespace name part of the expanded name has no value. Some contexts may
+    allow the use of an asterisk (<code>*</code>, U+002A) as a wildcard
     prefix to indicate a name in any namespace, including no namespace.</p>
 
    <div class=example>
@@ -392,6 +393,10 @@ <h2 id=css-qnames><span class=secno>4. </span>CSS Qualified Names</h2>
     cause the selector or declaration (etc.) to be considered invalid and, in
     CSS, <a
     href="http://www.w3.org/TR/CSS21/conform.html#ignore">ignored</a>.</p>
+
+   <p>In a CSS qualified name, a prefix that is declared to represent the
+    empty string namespace (<code>""</code>) is interpreted as representing
+    no namespace.</p>
   </div>
 
   <h2 class=no-num id=acknowledgments>Acknowledgments</h2>

css3-namespace/Overview.src.html

@@ -278,6 +278,10 @@ <h2 id="css-qnames">CSS Qualified Names</h2>
     should treat undeclared namespace prefixes as a parsing error that will
     cause the selector or declaration (etc.) to be considered invalid and, in
     CSS, <a href="http://www.w3.org/TR/CSS21/conform.html#ignore">ignored</a>.</p>
+
+  <p>In a CSS qualified name, a prefix that is declared to represent the
+    empty string namespace (<code>""</code>) is interpreted as representing
+    no namespace.</p>
 </div>
 
 <h2 class="no-num" id="acknowledgments">Acknowledgments</h2>