questions -- clarifications requested

Paul Leach writes:
	...
 > 
 > 9. Is the Expires entity-header field ever returned from POST, PUT, 
 > DELETE, LINK or UNLINK methods? (These are never cached, and the 
 > description implies of Expires implies it is only used for caching purposes.)
 > 
	...

The *results* of these operations can be cached.  The expires header
is appropriate.  Requests for these methods must go all the way
through to the origin server, and cannot be served from a cache
themselves.  The results can be identified with the Location header in
such a way that a subsequent GET or HEAD can retrieve *its* results
from the cached resource left in the cache by the POST, PUT, etc.

--Shel Kaphan