Define page progression direction.

Author: fantasai

css3-writing-modes/Overview.html

@@ -263,8 +263,12 @@ <h2 class="no-num no-toc" id=Contents>Table of Contents</h2>
       property</a>
     </ul>
 
-   <li><a href="#text-combine"><span class=secno>8. </span>Glyph Composition:
-    the &lsquo;<code class=property>text-combine</code>&rsquo; property</a>
+   <li><a href="#page-direction"><span class=secno>8. </span> Page Flow: the
+    page progression direction</a>
+
+   <li><a href="#text-combine"><span class=secno>9. </span> Glyph
+    Composition: the &lsquo;<code class=property>text-combine</code>&rsquo;
+    property</a>
 
    <li class=no-num><a href="#acknowledgements">Acknowledgements</a>
 
@@ -923,7 +927,8 @@ <h2 id=vertical-intro><span class=secno>3. </span> Introduction to Vertical
   </div>
 
   <p class=note>For Chinese and Japanese lines are ordered either right to
-   left or top to bottom, while for Mongolian and Manchu left to right.
+   left or top to bottom, while for Mongolian and Manchu lines are ordered
+   left to right.
 
   <p>The change from horizontal to vertical writing can affect not just the
    layout, but also the typesetting. For example, the position of a
@@ -2586,7 +2591,44 @@ <h4 id="spacing-attributes">Spacing Attributes</h4>
 -->
 
 
-  <h2 id=text-combine><span class=secno>8. </span>Glyph Composition: the
+  <h2 id=page-direction><span class=secno>8. </span> Page Flow: the page
+   progression direction</h2>
+
+  <p>In paged media CSS2.1 classifies all pages as either left or right
+   pages. The page progression direction, which determines whether the left
+   or right page in a spread is first in the flow and whether the first page
+   is by default a left or right page, depends on the writing direction as
+   follows:
+
+  <ul>
+   <li>The page progression is right-to-left if the root element's &lsquo;<a
+    href="#writing-mode1"><code class=property>writing-mode</code></a>&rsquo;
+    is &lsquo;<a href="#vertical-rl"><code
+    class=css>vertical-rl</code></a>&rsquo; or if the root element's
+    &lsquo;<a href="#writing-mode1"><code
+    class=property>writing-mode</code></a>&rsquo; is &lsquo;<a
+    href="#horizontal-tb"><code class=css>horizontal-tb</code></a>&rsquo; and
+    its &lsquo;<a href="#direction0"><code
+    class=property>direction</code></a>&rsquo; is &lsquo;<a href="#rtl"><code
+    class=css>rtl</code></a>&rsquo;.
+
+   <li>The page progression is left-to-right if the root element's &lsquo;<a
+    href="#writing-mode1"><code class=property>writing-mode</code></a>&rsquo;
+    is &lsquo;<a href="#vertical-lr"><code
+    class=css>vertical-lr</code></a>&rsquo; or if the root element's
+    &lsquo;<a href="#writing-mode1"><code
+    class=property>writing-mode</code></a>&rsquo; is &lsquo;<a
+    href="#horizontal-tb"><code class=css>horizontal-tb</code></a>&rsquo; and
+    its &lsquo;<a href="#direction0"><code
+    class=property>direction</code></a>&rsquo; is &lsquo;<a href="#ltr"><code
+    class=css>ltr</code></a>&rsquo;.
+  </ul>
+
+  <p>(Unless otherwise overridden, the first page of a document begins on the
+   second half of a spread, e.g. on the right page in a left-to-right page
+   progression.)
+
+  <h2 id=text-combine><span class=secno>9. </span> Glyph Composition: the
    &lsquo;<a href="#text-combine0"><code
    class=property>text-combine</code></a>&rsquo; property</h2>
 

css3-writing-modes/Overview.src.html

@@ -1930,7 +1930,29 @@ <h4 id="spacing-attributes">Spacing Attributes</h4>
   </ul>
 -->
 
-<h2 id="text-combine">Glyph Composition: the 'text-combine' property</h2>
+<h2 id="page-direction">
+Page Flow: the page progression direction</h2>
+
+  <p>In paged media CSS2.1 classifies all pages as either left or right pages.
+    The page progression direction, which determines whether the left or right
+    page in a spread is first in the flow and whether the first page is by
+    default a left or right page, depends on the writing direction as follows:
+
+  <ul>
+    <li>The page progression is right-to-left if the root element's
+      'writing-mode' is ''vertical-rl'' or if the root element's 'writing-mode'
+      is ''horizontal-tb'' and its 'direction' is ''rtl''.
+    <li>The page progression is left-to-right if the root element's
+      'writing-mode' is ''vertical-lr'' or if the root element's 'writing-mode'
+      is ''horizontal-tb'' and its 'direction' is ''ltr''.
+  </ul>
+
+  <p>(Unless otherwise overridden, the first page of a document begins on the
+    second half of a spread, e.g. on the right page in a left-to-right page
+    progression.)
+
+<h2 id="text-combine">
+Glyph Composition: the 'text-combine' property</h2>
 
   <table class="propdef">
     <tbody>