Add a definitions section for ASCII and UTF-8

diff --git a/policy.sgml b/policy.sgml
index 9e7e1fbdadab0372fd1384bd64d7315d2550383b..219664d6c70e7e9a0c3e63d13d15d957bc2505e6 100644 (file)
--- a/policy.sgml
+++ b/policy.sgml
@@ -273,6 +273,32 @@
        </p>
       </sect>
 
+      <sect id="definitions">
+       <heading>Definitions</heading>
+
+       <p>
+         The following terms are used in this Policy Manual:
+         <taglist>
+           <tag>ASCII</tag>
+           <item>
+             The character encoding specified by ANSI X3.4-1986 and its
+             predecessor standards, referred to in MIME as US-ASCII, and
+             corresponding to an encoding in eight bits per character of
+             the first 128 <url id="http://www.unicode.org/"
+             name="Unicode"> characters, with the eighth bit always zero.
+           </item>
+           <tag>UTF-8</tag>
+           <item>
+             The transformation format (sometimes called encoding) of
+             <url id="http://www.unicode.org/" name="Unicode"> defined by
+             <url id="http://www.rfc-editor.org/rfc/rfc3629.txt"
+             name="RFC 3629">.  UTF-8 has the useful property of having
+             ASCII as a subset, so any text encoded in ASCII is trivially
+             also valid UTF-8.
+           </item>
+         </taglist>
+       </p>
+      </sect>
     </chapt>