Clarifications to word-break

Author: fantasai

css3-text/Overview.html

@@ -1424,20 +1424,20 @@ <h3 id=word-break><span class=secno>4.2. </span> Word Breaking Rules: the
     class=css>break-all</code>&rsquo;</dfn>
 
    <dd>In addition to normal opportunities, lines may break between any two
-    letters within words except where forbidden by the &lsquo;<a
-    href="#line-break0"><code class=property>line-break</code></a>&rsquo;
-    property. Hyphenation is not applied. This option is used mostly in a
-    context where the text is predominantly using CJK characters with few
-    non-CJK excerpts and it is desired that the text be better distributed on
-    each line.
+    <a href="#letter0"><i>letters</i></a> within words except where forbidden
+    by the &lsquo;<a href="#line-break0"><code
+    class=property>line-break</code></a>&rsquo; property. Hyphenation is not
+    applied. This option is used mostly in a context where the text is
+    predominantly using CJK characters with few non-CJK excerpts and it is
+    desired that the text be better distributed on each line.
 
    <dt><dfn id=keep-all title="word-break:keep-all">&lsquo;<code
     class=css>keep-all</code>&rsquo;</dfn>
 
-   <dd> Implicit breaks between letters are suppressed, i.e. break
-    opportunties between pairs of ID, AL, AI, and HL characters as defined in
-    <a href="#UAX14" rel=biblioentry>[UAX14]<!--{{UAX14}}--></a> are are
-    prohibited. Otherwise this option is equivalent to &lsquo;<code
+   <dd> Implicit breaks between <a href="#letter0"><i>letters</i></a> are
+    suppressed, i.e. breaks are prohibited between pairs of letters except
+    where opportunities exist due to dictionary-based breaking (e.g. in
+    Thai). Otherwise this option is equivalent to &lsquo;<code
     class=css>normal</code>&rsquo;. This option produces a style where
     sequences of ideographic characters do not break, and word separator
     characters are present to create line-breaking opportunities. This style
@@ -1446,6 +1446,9 @@ <h3 id=word-break><span class=secno>4.2. </span> Word Breaking Rules: the
     uses spaces for seapration.
   </dl>
 
+  <p>Symbols that line-break the same way as letters of a particular category
+   are affected the same way as those letters.
+
   <div class=example>
    <p>Here's a mixed-script sample text:
 

css3-text/Overview.src.html

@@ -963,15 +963,15 @@ <h3 id="word-break">
       <dd>Break lines according to their usual rules.</dd>
       <dt><dfn title="word-break:break-all">''break-all''</dfn></dt>
       <dd>In addition to normal opportunities, lines may break between any two
-        letters within words except where forbidden by the 'line-break' property.
+        <i>letters</i> within words except where forbidden by the 'line-break' property.
         Hyphenation is not applied. This option is used mostly in a context where
         the text is predominantly using CJK characters with few non-CJK excerpts
         and it is desired that the text be better distributed on each line.</dd>
       <dt><dfn title="word-break:keep-all">''keep-all''</dfn></dt>
       <dd>
-        Implicit breaks between letters are suppressed, i.e.
-        break opportunties between pairs of ID, AL, AI, and HL characters
-        as defined in [[UAX14]] are are prohibited.
+        Implicit breaks between <i>letters</i> are suppressed, i.e.
+        breaks are prohibited between pairs of letters
+        except where opportunities exist due to dictionary-based breaking (e.g. in Thai).
         Otherwise this option is equivalent to ''normal''.
         This option produces a style where sequences of ideographic characters do
         not break, and word separator characters are present to create line-breaking
@@ -981,6 +981,9 @@ <h3 id="word-break">
         uses spaces for seapration.</dd>
     </dl>
 
+    <p>Symbols that line-break the same way as letters of a particular category
+    are affected the same way as those letters.
+
      <div class="example">
       <p>Here's a mixed-script sample text:
       <pre>这是一些汉字, and some Latin,<!--