Clarify application of vertical-align to margin boxes. Update link to Writing Modes.

Author: fantasai

css3-page/Overview.html

@@ -707,11 +707,13 @@ <h3 id=progression><span class=secno>4.3. </span>Page Progression</h3>
    </ul>
 
    <p>If the UA supports the ‘<code class=property>direction</code>’ and
-    ‘<code class=property>block-progression</code>’ properties from the
-    CSS 3 Text Layout Module <a href="#CSS3TEXTLAYOUT"
-    rel=biblioentry>[CSS3TEXTLAYOUT]<!--{{CSS3TEXTLAYOUT}}--></a>, it must
-    determine whether the first page is a left or right page from the values
-    of those properties on the root element.</p>
+    ‘<code class=property>writing-mode</code>’ properties from the CSS 3
+    Writing Modes Module <a href="#CSS3-WRITING-MODES"
+    rel=biblioentry>[CSS3-WRITING-MODES]<!--{{CSS3-WRITING-MODES}}--></a>, it
+    must <a
+    href="http://www.w3.org/TR/css3-writing-modes/#page-direction">determine</a>
+    whether the first page is a left or right page from the values of those
+    properties on the root element.</p>
 
    <p>To explicitly force a document to begin printing on a left or right
     page, authors can <a href="#page-break-before">insert a page break
@@ -1785,6 +1787,12 @@ <h2 id=page-properties><span class=secno>7. </span>Page Properties</h2>
       class=css>normal</code>’ value of the ‘<code
       class=property>content</code>’ property computes to ‘<code
       class=css>none</code>’ on margin boxes.
+
+     <li>On margin boxes, the ‘<code
+      class=property>vertical-align</code>’ property behaves <a
+      href="http://www.w3.org/TR/CSS21/tables.html#height-layout">as
+      specified for table cells</a>. It <em>always</em> performs alignment in
+      the vertical dimension, regardless of writing mode.
     </ul>
 
     <p>It is <em class=RFC2119>recommended</em> that user agents establish a
@@ -3591,11 +3599,14 @@ <h3 class=no-num id=informative-references>Informative References</h3>
       style="display: none"><!-- keeps the doc valid if the DL is empty -->
       <!---->
 
-     <dt id=CSS3TEXTLAYOUT>[CSS3TEXTLAYOUT]
+     <dt id=CSS3-WRITING-MODES>[CSS3-WRITING-MODES]
 
-     <dd>Elika J. Etemad; Koji Ishii; Shinyu Murakami. <cite>CSS Writing
-      Modes Module.</cite> (forthcoming). W3C Working Draft. (Work in
-      progress.)</dd>
+     <dd>Elika J. Etemad; Koji Ishii. <a
+      href="http://www.w3.org/TR/2012/WD-css3-writing-modes-20120501/"><cite>CSS
+      Writing Modes Module Level 3.</cite></a> 1 May 2012. W3C Working Draft.
+      (Work in progress.) URL: <a
+      href="http://www.w3.org/TR/2012/WD-css3-writing-modes-20120501/">http://www.w3.org/TR/2012/WD-css3-writing-modes-20120501/</a>
+      </dd>
      <!---->
     </dl>
     <!--end-informative--></div>

css3-page/Overview.src.html

@@ -435,8 +435,9 @@ <h3 id="progression">Page Progression</h3>
   same as the block progression.</li>
 </ul>
 
-<p>If the UA supports the 'direction' and 'block-progression' properties
-from the CSS 3 Text Layout Module [[CSS3TEXTLAYOUT]], it must determine
+<p>If the UA supports the 'direction' and 'writing-mode' properties
+from the CSS 3 Writing Modes Module [[CSS3-WRITING-MODES]], it must
+<a href="http://www.w3.org/TR/css3-writing-modes/#page-direction">determine</a>
 whether the first page is a left or right page from the values of those
 properties on the root element.</p>
 
@@ -1279,6 +1280,10 @@ <h2 id="page-properties">Page Properties</h2>
   described below</a>.</li>
   <li>As on the '::before' and '::after' pseudo-classes, the ''normal'' value of
   the 'content' property computes to ''none'' on margin boxes.</li>
+  <li>On margin boxes, the 'vertical-align' property behaves
+  <a href="http://www.w3.org/TR/CSS21/tables.html#height-layout">as specified for table cells</a>.
+  It <em>always</em> performs alignment in the vertical dimension,
+  regardless of writing mode.
 </ul>
 
 <p>It is <em class="RFC2119">recommended</em> that user agents establish a default