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RE: Query use cases

From: Seaborne, Andy <Andy_Seaborne@hplb.hpl.hp.com>
Date: Wed, 11 Sep 2002 12:57:24 +0100
Message-ID: <5E13A1874524D411A876006008CD059F04EBD897@0-mail-1.hpl.hp.com>
To: "'Graham Klyne'" <GK@NineByNine.org>
Cc: "Barnell, Alex" <Alex_Barnell@hplb.hpl.hp.com>, "'RDF Rules'" <www-rdf-rules@w3.org>


That's an interesting example (daml:collection) - presumably it suggests the
query should return only the list head and start part way down (unlikely the
query would do this match but possible).  I didn't notice anything DQL about
this - maybe I missed it.

The same is true of RDF alt/seq/bag - in many application situations it
would be nicest to mask the RDF encoding of the compound structure and
return a 

Alex Barnell has been doing some work here on "RDFObjects" which provides
applications with a view of the RDF data as structured data items (e.g.
action items for working groups, vCards or iCal entries).

Is this way of thinking about it - as higher level data abstractions - what
is going on, do you think?

Would submit an example at
http://rdfstore.sourceforge.net/2002/06/24/rdf-query/, run by Alberto
Reggiori, which is a collection of query examples even if it's a use case
with no solution.

As to query discussion - www-rdf-rules is the only place I know of.


-----Original Message-----
From: Graham Klyne [mailto:GK@NineByNine.org] 
Sent: 10 September 2002 16:26
To: Andy Seaborne
Cc: RDF Rules
Subject: Query use cases

I may be losing track, but are the query use-case discussions still 
proceeding?  If so, on which mailing list?  (I think it was www-rdf-rules.)

I think I've encountered a new requirement (or desiderata), namely to 
construct a query that iterates (somehow) over a daml:collection style of

Any thoughts out there?

I think I can modify my variable-binding query processor to support 
recursive query processing (selectively rebinding some of the query

Maybe I'm only seeing this as an issue because I use the results (variable 
bindings) from one query to constrain the results of a subsequent query?


At 05:34 PM 6/5/02 +0100, Andy Seaborne wrote:
>Hi there,
>After WWW2002 and other discussions, I have been thinking about
>gathering together a set of query use cases by asking the users of RDF
>query systems.


Graham Klyne
Received on Wednesday, 11 September 2002 07:58:05 UTC

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