Docs for CREATE RULE with WHERE/NOTIFY

Hello,

I've just been bitten by this:

dsuch=# CREATE RULE foorule AS ON UPDATE
dsuch-#     TO foo WHERE NEW.x = '1'
dsuch-#     DO ALSO NOTIFY bar;
ERROR:  rules with WHERE conditions may only have SELECT, INSERT,
UPDATE, or DELETE actions

Here's an explanation
http://archives.postgresql.org/pgsql-hackers/2001-11/msg00986.php,
but would you also consider applying the following tiny patch to
create_rule.sgml
to document the behaviour?

thank you,

*** create_rule.sgml.orig    Sun Jun 24 21:09:22 2007
--- create_rule.sgml    Sun Jun 24 21:09:37 2007
***************
*** 176,185 ****
--- 176,187 ----
        <para>
         The command or commands that make up the rule action.  Valid
         commands are <command>SELECT</command>,
         <command>INSERT</command>, <command>UPDATE</command>,
         <command>DELETE</command>, or <command>NOTIFY</command>.
+       Note that <command>NOTIFY</command> is not a valid command if
+       <replaceable class="parameter">condition</replaceable> is
specified.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>

--
Dariusz Suchojad