New helper query interface method

[KevinBenson]

>From what I could tell from Yuji e-mail the main thing is about not
returning so much data all at once to the client.  Somebody a long time ago
mentioned a resumptionToken or pagingID concept on the query/search.  I
think this is something that would be good and needed.  So you could page
through your query results.  That way you might not return thousands at a
time, but a certain amount and let the client page through all the results
with the registry web service.  A user may send a global query; not even
sure if we could handle returning 11,000 resources at once, so this is
something we should look into.  The idea would be is to return a pagingID
then a client who wants to see more would send it back again to the registry
web service to get the next set of Resources.

Cheers,
Kevin

FYI, I will say Astrogrid does use a maxcount kind of property, so that is
the maximum number of resources that is returned from the registry.  But
having a paging system would be nicer in case a user wants to see more
results.

-----Original Message-----
From: owner-registry at eso.org [mailto:owner-registry at eso.org]On Behalf Of
Tony Linde
Sent: 14 April 2005 08:27
To: 'Registry List'
Subject: RE: New helper query interface method


> I also think that Yuji Shirasaki's idea of having a search
> that returns a list of identifiers for a query is a
> potentially good one, and possibly even a function that
> returns the number of matches for a query.
> - This could of course be done with a single query interface
> function but with a slightly extended RQL

Perhaps a flag indicating whether to return 'documents', 'identifiers' or
'count' on the query?

T.

> -----Original Message-----
> From: owner-registry at eso.org [mailto:owner-registry at eso.org]
> On Behalf Of Paul Harrison
> Sent: 14 April 2005 08:15
> To: Ray Plante
> Cc: Registry List
> Subject: Re: New helper query interface method
>
> Ray Plante wrote:
> > Hi,
> >
> >
> >>GetResource
> >
> >
> > I think it would be good to have an explicit identifier resolver
> > function, even though this is possible directly with the
> constraint-based search.
> > (In fact, we should define it as being equivalient to a search with
> > the constraint "identifier='{ivo-id}'".)  An immediate use for this
> > would be to check that an authority ID is not already registered;
> > however, I can imagine other applications using this.
> >
> > On Wed, 13 Apr 2005, Matthew J. Graham wrote:
> >
> >>But this is exactly the same as the OAI GetRecord method?
> >
> >
> > The proposal is to make it specifically part of the Search
> interface
> > (which should be independent of the Harvesting interface).
> >
> > cheers,
> > Ray
> >
>
> It would please me! -the majority of the queries that I want
> to make are of this form, and it would save having to create
> adql for the purpose....
>
> I also think that Yuji Shirasaki's idea of having a search
> that returns a list of identifiers for a query is a
> potentially good one, and possibly even a function that
> returns the number of matches for a query.
> - This could of course be done with a single query interface
> function but with a slightly extended RQL
>
> Regards,
> 	Paul.
>
> --
> Paul Harrison
> ESO Garching
> www.eso.org
>