Ray Denenberg, Library of Congress writes:
 > Mike, we had what seemed to be endless discussion on this a few
 > years ago.  Most felt it wasn't needed. For example, ttl=0 in a
 > query consisting solely of the result set was though to have the
 > semantics of delete result set.

Thanks, Ray, that rings a bell.  (I'm not _asking_ for a Delete Result
Set service in SRU, you understand, just making sure that I correctly
understand the situation as it currently stands.)  An RSID search with
TTL=0 is a neat solution.

 > I can only suggest that you search the archive. Search for "delete
 > result set" and you'll see some of this discussion.

It would be good to have links to the mailing list admin page and the
archives on the SRU page at http://www.loc.gov/standards/sru/

 _/|_	 ___________________________________________________________________
/o ) \/  Mike Taylor    <[log in to unmask]>    http://www.miketaylor.org.uk
)_v__/\  "Anyone can see that Michael Owen represents Carlsberg and Reebok.
	 But you'd need binoculars to notice that he also plays for
	 Liverpool" -- George Monbiot, writing in the _Guardian_