Clarify that this is an early WD, stable-spec-seekers should refer to Selectors 3

Author: fantasai

selectors4/Overview.html

@@ -125,6 +125,12 @@ <h2 class="no-num no-toc" id=status>Status of this Document</h2>
    W3C Patent Policy</a>.</p>
   <!--end-status-->
 
+  <p><strong>This module is an early-stage Working Draft. If you are looking
+   for a stable Selectors specification, use <a
+   href="http://www.w3.org/TR/css3-selectors/">Selectors 3</a>.</strong> Read
+   the <a href="http://www.w3.org/TR/CSS/">CSS Snapshot</a> for an overview
+   of the CSS development process.
+
   <h2 class="no-num no-toc" id=contents>Table of Contents</h2>
   <!--begin-toc-->
 
@@ -443,7 +449,8 @@ <h2 id=context><span class=secno>1. </span> Introduction</h2>
 
   <p><em>This section is not normative.</em>
 
-  <p>Selectors define the following function:
+  <p>Selectors define the following function for elements in a tree
+   structure:
 
   <pre>expression &#x2217; element &rarr; boolean</pre>
 
@@ -462,13 +469,12 @@ <h2 id=context><span class=secno>1. </span> Introduction</h2>
    href="http://www.w3.org/TR/REC-CSS1">CSS1</a>, <a
    href="http://www.w3.org/TR/CSS21/">CSS2.1</a>, and <a
    href="http://www.w3.org/TR/css3-selectors/">Selectors Level 3</a>
-   specifications, respectively.
+   specifications, respectively. This module defines Selectors Level 4.
 
   <h3 id=placement><span class=secno>1.1. </span>Module Interactions</h3>
 
   <p>This module replaces the definitions for, and extends the set of
-   selectors (aside from pseudo-element selectors) defined for CSS in
-   [[CSS3SELECT]] and <a href="#CSS21"
+   selectors defined for CSS in [[CSS3SELECT]] and <a href="#CSS21"
    rel=biblioentry>[CSS21]<!--{{CSS21}}--></a>.
 
   <p>Pseudo-element selectors, which define abstract elements in a rendering

selectors4/Overview.src.html

@@ -70,6 +70,12 @@ <h2 class="no-num no-toc" id=status>Status of this Document</h2>
 
   <!--status-->
 
+  <p><strong>This module is an early-stage Working Draft. If you are
+  looking for a stable Selectors specification, use
+  <a href="http://www.w3.org/TR/css3-selectors/">Selectors 3</a>.</strong>
+  Read the <a href="http://www.w3.org/TR/CSS/">CSS Snapshot</a> for
+  an overview of the CSS development process.
+
   <h2 class="no-num no-toc" id="contents">Table of Contents</h2>
   <!--toc-->
 
@@ -78,7 +84,7 @@ <h2 id=context>
 
   <p><em>This section is not normative.</em>
 
-  <p>Selectors define the following function:</p>
+  <p>Selectors define the following function for elements in a tree structure:</p>
 
   <pre>expression &#x2217; element &rarr; boolean</pre>
 
@@ -96,12 +102,12 @@ <h2 id=context>
   functionality defined in the <a href="http://www.w3.org/TR/REC-CSS1">CSS1</a>,
   <a href="http://www.w3.org/TR/CSS21/">CSS2.1</a>, and
   <a href="http://www.w3.org/TR/css3-selectors/">Selectors Level 3</a>
-  specifications, respectively.</p>
+  specifications, respectively. This module defines Selectors Level 4.
 
 <h3 id="placement">Module Interactions</h3>
 
   <p>This module replaces the definitions for, and extends the set of
-    selectors (aside from pseudo-element selectors) defined for CSS
+    selectors defined for CSS
     in [[CSS3SELECT]] and [[CSS21]].
 
   <p>Pseudo-element selectors, which define abstract elements in a