- From: Seaborne, Andy <Andy_Seaborne@hplb.hpl.hp.com>
- Date: Wed, 11 Sep 2002 20:40:34 +0100
- To: "'Graham Klyne'" <GK@NineByNine.org>
- Cc: "Barnell, Alex" <Alex_Barnell@hplb.hpl.hp.com>, "'RDF Rules'" <www-rdf-rules@w3.org>
Correction: "the query should return only the list head and NOT start part way down" in the result set Andy -----Original Message----- From: Seaborne, Andy [mailto:Andy_Seaborne@hplb.hpl.hp.com] Sent: 11 September 2002 12:57 To: 'Graham Klyne' Cc: Barnell, Alex; 'RDF Rules' Subject: RE: Query use cases Graham, 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. Andy -----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 list. 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 variables). 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? #g -- 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 <GK@NineByNine.org>
Received on Wednesday, 11 September 2002 15:41:12 UTC