[css2] A BOM overrides any out-of-band information about character encoding,

bert-github · bert-github · commit 89838779f7a2 · 2013-05-02T13:02:40.000Z
see http://lists.w3.org/Archives/Public/www-style/2012Oct/0727.html --HG-- extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%403273
diff --git a/css2/syndata.src b/css2/syndata.src
@@ -1,6 +1,6 @@
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">
 <html lang="en">
-<!-- $Id: syndata.src,v 2.192 2013-05-02 12:11:38 bbos Exp $ -->
+<!-- $Id: syndata.src,v 2.193 2013-05-02 13:02:40 bbos Exp $ -->
 <head>
 <title>Syntax and basic data types</title>
 <!--script src="http://www.w3c-test.org/css/harness/annotate.js#CSS21_DEV" type="text/javascript" defer></script-->
@@ -1419,6 +1419,13 @@ class="index-inst">@charset</span> (see below)</li>
 <li>Assume UTF-8</li>
 </ol>
 
+<p class=note>Note that it is not possible to use a 1-byte character
+encoding and start the CSS file with the characters 255 and 254 in
+either order, because the two characters will be interpreted as a
+BOM. E.g., "&#255;" and "&#254;" in ISO-8859-1, "&#729;" and "&#355;"
+in ISO-8859-2, etc. Authors should start such files with something
+else, e.g., a space.
+
 <p>Authors using an <span class="index-inst">@charset</span> rule must
 place the rule at the very beginning of the style sheet, preceded by
 no characters. (If a byte order mark is appropriate for the encoding
