fixing typos; adding chapter heading; adding section on conditional text

Author: howcom

css3-gcpm/Overview.src.html

@@ -2094,14 +2094,16 @@ <h2>Page marks and bleed area</h2>
 
 
 
-<h2>Bookmarks: 'bookmark-level', </h2>
+<h2>Bookmarks</h2>
 
 <p>Some document formats have the capability of holding bookmarks.
 Bookmarks are typically shown outside the document itself, often in a
 tree-structured and clickable table of contents. To generate
 bookmarks, these properties are defined: 'bookmark-level',
 'bookmark-label', and 'bookmark-state'.
 
+<h3>'bookmark-level'</h3>
+
 <table class=propdef>
     <tr>
       <td><em>Name:</em>
@@ -2155,6 +2157,8 @@ <h2>Bookmarks: 'bookmark-level', </h2>
 </div>
 
 
+<h3>'bookmark-label'</h3>
+
 <table class=propdef>
     <tr>
       <td><em>Name:</em>
@@ -2253,6 +2257,8 @@ <h2>Bookmarks: 'bookmark-level', </h2>
 
 -->
 
+<h3>'bookmark-state'</h3>
+
 <table class=propdef>
     <tr>
       <td><em>Name:</em>
@@ -2610,13 +2616,14 @@ <h2>Page and column floats</h2>
 
 <p>The optional keyword value specifies where the element is floated: top, bottom, or the nearest of the two. The initial value is 'near'.
 
+<p>An element is considered to be a float if it has a snap() value, even if the element does not appear within the specified distance. This way, it can be determined whether an element is float or not without laying out the document. 
+
 <dt>snap
 
 <dd>same as <tt>snap(2em, near)</tt>
 
 </dl>
 
-
 <div class=example>
 <p>In this example, tables will snap to the top/bottom if the top/bottom of the border box is closer than '3em' from the top/bottom of the page/column.
 
@@ -2630,7 +2637,6 @@ <h2>Page and column floats</h2>
 
 <p class=issue>Should we define a reasonable default (say, 3em) instead of relying on implementation-specific values? 
 <p class=issue>Do numberic values (in addition to length values) make sense, like for orphans/widows
-<p class=issue>is an element with a snap() value considered to be a float? only when it really floats, or always?
 
 
 <!--
@@ -3611,6 +3617,16 @@ <h2>Selecting lines</h2>
 </pre>
 </div>
 
+<h2>Conditional text</h2>
+
+<div class=example>
+<pre>
+  a:target-layout(attr(href url), same-page) { content: " on this page" }
+  a:target-layout(attr(href url), next-page) { content: " on the next page" }
+  a:target-layout(attr(href url), previous-page) { content: " on the previous page" }
+</pre>
+</div>
+
 
 <h2>Conformance</h2>