[css-text] Broaden allowance for tailoring and put in example from James Clark <http://lists.w3.org/Archives/Public/www-style/2013Sep/0542.html>

Author: fantasai

css-text/Overview.html

@@ -10,7 +10,7 @@
    rel=dcterms.rights>
   <meta content="CSS Text Module Level 3 (CSS3 Text)" name=dcterms.title>
   <meta content=text name=dcterms.type>
-  <meta content=2013-09-16 name=dcterms.date>
+  <meta content=2013-09-23 name=dcterms.date>
   <meta content="Elika J. Etemad" name=dcterms.creator>
   <meta content="Koji Ishii" name=dcterms.creator>
   <meta content=W3C name=dcterms.publisher>
@@ -68,13 +68,13 @@
 
    <h1>CSS Text Module Level 3</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 16 September
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 23 September
     2013</h2>
 
    <dl>
     <dt>This version:</dt>
     <!--
-    <dd><a href="http://www.w3.org/TR/2013/WD-css3-text-20130916/">http://www.w3.org/TR/2013/WD-css3-text-20130916/</a></dd>
+    <dd><a href="http://www.w3.org/TR/2013/WD-css3-text-20130923/">http://www.w3.org/TR/2013/WD-css3-text-20130923/</a></dd>
 -->
 
     <dd><a
@@ -477,7 +477,21 @@ <h3 id=terms><span class=secno>1.3. </span> Terminology</h3>
    <em>extended grapheme cluster</em> definition in <a href="#UAX29"
    rel=biblioentry>[UAX29]<!--{{!UAX29}}--></a> (not the <em>legacy grapheme
    cluster</em> definition). The UA may further tailor the definition as
-   allowed by Unicode. Within this specification, the ambiguous term <dfn
+   required by typographical tradition.
+
+  <div class=example>
+   <p>For example, to properly letter-space the Thai word คำ (U+0E04 +
+    U+0E33), the U+0E33 needs to be decomposed into U+0E4D + U+0E32, and then
+    the extra letter-space inserted before the U+0E32: คํ า.
+
+   <p>A slightly more complex example is น้ำ (U+0E19 + U+0E49 +
+    U+0E33). In this case, normal Thai shaping will first decompose the
+    U+0E33 into U+0E4D + U+0E32 and then swap the U+0E4D with the U+0E49,
+    giving U+0E19 + U+0E4D + U+0E49 + U+0E32. As before the extra
+    letter-space is then inserted before the U+0E32: นํ้ า.
+  </div>
+
+  <p>Within this specification, the ambiguous term <dfn
    id=character>character</dfn> is used as a friendlier synonym for <a
    href="#grapheme-cluster0"><i>grapheme cluster</i></a>. See <a
    href="http://www.w3.org/TR/css3-writing-modes/#character-properties">Characters

css-text/Overview.src.html

@@ -245,8 +245,22 @@ <h3 id="terms">
     script. The term is described in detail in the Unicode Technical
     Report: Text Boundaries [[!UAX29]]. This specification uses the
     <em>extended grapheme cluster</em> definition in [[!UAX29]] (not
-    the <em>legacy grapheme cluster</em> definition). The UA may further
-    tailor the definition as allowed by Unicode. Within this specification,
+    the <em>legacy grapheme cluster</em> definition).
+    The UA may further tailor the definition as required by typographical tradition.
+
+  <div class="example">
+    <p>For example,
+      to properly letter-space the Thai word คำ (U+0E04 + U+0E33),
+      the U+0E33 needs to be decomposed into U+0E4D + U+0E32,
+      and then the extra letter-space inserted before the U+0E32: คํ า.
+
+    <p>A slightly more complex example is น้ำ (U+0E19 + U+0E49 + U+0E33).
+       In this case, normal Thai shaping will first decompose the U+0E33 into U+0E4D + U+0E32
+       and then swap the U+0E4D with the U+0E49, giving U+0E19 + U+0E4D + U+0E49 + U+0E32.
+       As before the extra letter-space is then inserted before the U+0E32: นํ้ า.
+  </div>
+
+  <p>Within this specification,
     the ambiguous term <dfn>character</dfn> is used as a friendlier synonym
     for <i>grapheme cluster</i>.
     See <a href="http://www.w3.org/TR/css3-writing-modes/#character-properties">Characters and Properties</a>