W3C home > Mailing lists > Public > public-rdf-dawg@w3.org > April to June 2004

Re: requirement: multigraph query

From: Kendall Clark <kendall@monkeyfist.com>
Date: Thu, 6 May 2004 18:10:55 -0400
To: "Seaborne, Andy" <andy.seaborne@hp.com>
Cc: public-rdf-dawg@w3.org
Message-ID: <20040506221055.GG12831@monkeyfist.com>

On Thu, May 06, 2004 at 09:52:07PM +0100, Seaborne, Andy wrote:

> The first "aggregated query" case seems particularly a local API issue. Have
> I missed something in thinking that there is no advantage to be gained by
> knowing a query is the union of multiple query results?

I'm a cell phone. I want to look at the RSS 1.0 feeds of all the
people in my FOAF file in order to construct a list of email
addresses. I want to submit one query to my DAWG service and get back
a list of email addresses (in some format... unspecified here). I want
to submit *one* query because my service is often unreliable and
always expensive.

So, instead of requesting one query n times, I want to request
one. Something like:

SELECT...
WHERE...
USING...
IN
   http://foo/foaf.rdf
   http://bar/foaf.rdf
   http://blaz/foaf.rdf

That's what I called aggregated query; but note that it doesn't
require the multiple graphs to be remote. I think there are other use
cases where they are local.

> 	Andy "who sees the requirements list growing rather long"

We've approved, at last count, two. That seems pretty short.

Best,
Kendall Clark
Received on Thursday, 6 May 2004 18:12:07 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 16:15:19 GMT