Add description:

<   information, either by name or offset from UTC
>   information, either zone name or offset from UTC
>
>   If the TIMESTAMP value is stored with a time zone name, interval
>   computations should adjust based on the time zone rules, e.g. adding
>   24 hours to a timestamp would yield a different result from adding one
>   day.
>

doc/TODO

@@ -6,7 +6,7 @@ TODO list for PostgreSQL
 Bracketed items "[]" have more detail.
 
 Current maintainer:	Bruce Momjian (pgman@candle.pha.pa.us)
-Last updated:		Fri Nov 12 18:26:29 EST 2004
+Last updated:		Sun Nov 28 00:12:08 EST 2004
 
 The most recent version of this document can be viewed at the PostgreSQL web
 site, http://www.PostgreSQL.org.
@@ -150,7 +150,13 @@ Data Types
 * Allow customization of the known set of TZ names (generalize the
   present australian_timezones hack)
 * Allow TIMESTAMP WITH TIME ZONE to store the original timezone
-  information, either by name or offset from UTC
+  information, either zone name or offset from UTC
+
+  If the TIMESTAMP value is stored with a time zone name, interval 
+  computations should adjust based on the time zone rules, e.g. adding
+  24 hours to a timestamp would yield a different result from adding one
+  day.
+
 * Prevent INET cast to CIDR if the unmasked bits are not zero, or
   zero the bits