> From: Alan Kent [mailto:[log in to unmask]]
> Sent: Wednesday, October 09, 2002 3:31 PM
>
> How is this going to be turned into Z39.50 requests? Is '^' going to
> be in the regexp sent to the server? Or is it going to be removed at
> the client end and sent as a 'first-in-field' attribute?
This is properly an implementation issue, left to the gateway to do in
whatever way it sees fit. Also, a clever gateway might transform
"^foo" differewntly depending on the capabilities of the Z39.50
servers it forwards the query to: one might support regexp matching
and not the first-in-field attribute; another might do the converse.
> Date: Wed, 9 Oct 2002 16:04:40 -0400
> From: "LeVan,Ralph" <[log in to unmask]>
>
> I think we're ahead of the ZIG in our understanding of the
> difference between searching wordlists and strings.
I agree. When the time comes to bring this to the wider ZIG, it
behoves us to take the time over a really clear presentation: maybe
something like a white-paper. Having thrashed our way painfully to a
clear understanding, we want to make sure that we disseminate that
understanding accurately rather than merely sparking a similarly
confusing debate on the ZIG list.
> What if they had said "cat eats ^hat", which we've decided is legal?
One obvious implementation would be for the gateway to rewrite the
query as a Type-1 boolean and send that to the Z39.50 server.
> I think I've convinced myself that we'll need a new regexp that does
> only apply to wordlists and we'll have to bring the ZIG up to speed.
Yes, but please don't call it a regexp! That will confuse people,
since regexps conventionally always refer to string matching. What we
have here is pretty much a new concept, and it deserves a new name.
> Ray, let's not propose anything to the ZIG list until we've got this
> all worked out among ourselves.
I agree that there's no rush over this.
_/|_ _______________________________________________________________
/o ) \/ Mike Taylor <[log in to unmask]> www.miketaylor.org.uk
)_v__/\ "Never eat more than you can lift" -- Ms. Piggy.
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