FYI: Expires Extension Draft

[James M Snell]

http://www.ietf.org/internet-drafts/draft-snell-atompub-feed-expires-00.txt
Example:

<entry>
 ...
 <t:expires xmlns:t="...">2005-08-16T12:00:00Z</t:expires>
 ...
</entry>

or

<entry>
 ...
 <updated>2005-08-16T12:00:00Z</updated>
 <t:max-age>20000</t:max-age>
 ...
</entry>

This is not to be used for caching of Atom documents; nor is it to be 
used as a mechanism for scheduling updates of local copies of Atom 
documents.

- James