- From: Wolfgang Nejdl <nejdl@kbs.uni-hannover.de>
- Date: Fri, 14 Feb 2003 17:31:24 +0100
- To: Libby Miller <Libby.Miller@bristol.ac.uk>
- Cc: www-rdf-rules@w3.org
> > > hi all > > As part of the EC SWAD-Europe project [1], I'm writing a report on query > languages for RDF. Rather than repeat lots of excellent work (e.g. > [2][3][4]), I've decided to focus on testcases for RDF query. I started > a thread on query testcases on this list a couple of weeks ago. A > summary is here > > http://esw.w3.org/t/view/ESW/RDFQueryTestCases > > I've started a wiki page about RDF query testcases requirements: > > http://esw.w3.org/t/view/ESW/RDFQueryTestcasesRequirements > > I've jotted down some things that I think are required, based on a RDF > query testcases manifest format I've been using for query testcases > > http://swordfish.rdfweb.org/rdfquery/tests/query-results-manifest.rdf > > and additions to that suggested by Alberto Reggiori. These are just some > rough notes, and before I continue I'd like feedback and input from the > community. > > The main issue for me is how to express the query itself. > My inclination is to try and express queries as graphs with parts > missing, that is, to interpret an RDF graph as a query, as Jos de Roo > suggested [5]. > > I think this would give us one big win, which is that we could ignore > the syntactic differences between several very similar query languages > for RDF (although this will by no means encompass all RDF query > languages). Plus of course, we get the query parser for free. Yes, but of course you'll only be able to express conjunctive queries ... Wolfgang > > For a next step with the requirements, we could have a meeting on IRC > to discuss requirements for RDF query testcases, if enough people thought > it was an interesting direction to go in at this stage. Irc meetings > have been interesting and effective for RDF calendar [6]. > > I would suggest sometime in the week of 24th February, maybe Thursday > 27th at 17:00 GMT. > > What does everyone think? any takers for a meeting? > > cheers > > Libby > > [1] http://www.w3.org/2001/sw/Europe/ > [2] http://139.91.183.30:9090/RDF/publications/tr308.pdf > [3] http://www.w3.org/2001/11/13-RDF-Query-Rules/ > [4] http://rdfstore.sourceforge.net/2002/06/24/rdf-query/ > [5] http://lists.w3.org/Archives/Public/www-rdf-rules/2003Jan/0004.html > [6] http://www.w3.org/2002/12/cal/ > > > >
Received on Friday, 14 February 2003 12:56:55 UTC