> -----Original Message-----
> From: Z39.50 Next-Generation Initiative [mailto:[log in to unmask]] On Behalf
> Mike Taylor
> > Currently SRW has pride of place, as it was expected that SRW would
> > be at least as frequently implemented as SRU, which turns out not to
> > be the case.
> No indeed.

Sorry, I let this comment go by once, but need to react.

My experience is that SRW is significantly more efficient than SRU.
(I've got a paper on the subject in progress.)

In java, you have to make a new URL for every SRU transaction.  That
turns out to be expensive.  Running it over SRW lets the URL be reused
and was considerably more efficient.

Switching from the SOAP toolkit to hand-built SOAP messages resulted in
yet more efficiency.  I suspect I'll be bringing up the topic of SOAP in
document mode instead of RPC mode before too long.