- From: <jos.deroo@agfa.com>
- Date: Wed, 13 Apr 2005 17:51:47 +0200
- To: connolly@w3.org
- Cc: RDF Data Access Working Group <public-rdf-dawg@w3.org>, public-rdf-dawg-request@w3.org
Dan Connolly wrote: > On Thu, 2005-04-07 at 01:30 +0200, jos.deroo@agfa.com wrote: > > Dan Connolly wrote: > [...] > > > That was not a popular design when it was discussed in Helsinki > > > under issue useMentionOp > > > http://www.w3.org/2001/sw/DataAccess/ftf4.html#itemumop > > > <- http://www.w3.org/2001/sw/DataAccess/issues#useMentionOp > > > > > > Let's see... no, you weren't there for that one. You might > > > want to look over the record of that item and see if the > > > rationale/discussion there satisfies you. (I think I meant > > > to abstain but was too busy chairing to get my abstention > > > recorded.) > > > > OK, I read record and would certainly have liked the discussion > > (but had other f2f's at that time) and all I can really add > > is that we use that design of "treating mathematical inferences > > like RDFS and other inferences" since 5 years it really works. > > > > > If not, you can ask to re-open the issue. > > > > An implementation can convert pieces of WHERE triple patterns > > into certain internal (FILTER) expressions and they could > > behave much like traditional programming language expressions > > and I think it is best to keep that for the implementation > > instead of prescibing it (just being delarative is fine). > > Also given the position below, I would ask to re-open and > > drop FILTER. > > I think useMentionOp wasn't really the closest issue to > what you're talking about. I think valueTesting is closer. > valueTesting is currently open. EricP and DaveB have > an action to present a design by the 19 Apr teleconference. > I expect them to continue with the FILTER design. > I think it's reasonably mature. I was able to use it > for many of these survey examples. Jeen turned those > into tests and Andy pointed out that ARQ handles them. > > I think there are a lot of details to work out in > moving things like < and = out of FILTER and into > the graph pattern... especially w.r.t. negation. > I'm not sure anybody has time to work out a complete > proposal. But I guess you have it implemented, so maybe > you can explain how the various details work? it all works like explained in http://www.w3.org/2000/10/swap/doc/Built-In and we have all our work done that way > You might try taking each of the examples from the > editor's draft and each of these query language survey > examples and writing them without FILTER. more than happy to do that and was able to spend some time last night (but had to fix issue for unify with ?x@de) (we will follow up some of those on public-cwm-talk) the data we assume is the data at http://www.w3.org/2001/sw/DataAccess/tests/data/survey/survey-sample.ttl but I changed @prefix: into @prefix : the n3 queries are at http://eulersharp.sourceforge.net/2004/04test/query-survey-1.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-2.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-3.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-8.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-9.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-10.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-11.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-12.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-13.n3 and the results are at http://eulersharp.sourceforge.net/2004/04test/query-survey-result-1.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-2.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-3.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-8.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-9.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-10.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-11.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-12.n3 http://eulersharp.sourceforge.net/2004/04test/query-survey-result-13.n3 I think they all work ah.. in some cases with rdfs:member we also assume http://eulersharp.sourceforge.net/2003/03swap/rdfs-rules.n3) -- Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/
Received on Wednesday, 13 April 2005 15:51:59 UTC