- From: Dave Beckett <dave.beckett@bristol.ac.uk>
- Date: Tue, 15 Feb 2005 16:27:15 +0000
- To: public-rdf-dawg@w3.org
Minutes of RDF DAWG telecon 2005-02-15 for review RDF Data Access WG telcon 2005-02-15 14:30 UTC Agenda http://lists.w3.org/Archives/Public/public-rdf-dawg/2005JanMar/0125.html IRC log http://www.w3.org/2005/02/15-dawg-irc 1. Convene, take roll, review records and agenda Atendees: Yoshio Fukushige, Dan Connolly, Janne Saarela, Andy Seabourne, Jos De Roo, Steve Harris, Eric Prud'hommeaux, Dave Beckett, Kendall Clark, Alberto Reggiori Regrets: Pat Hayes Scribe: Dave Beckett RESOLVED to accept 8 Feb 2005 minutes as a true record. http://lists.w3.org/Archives/Public/public-rdf-dawg/2005JanMar/0115.html next meeting: 22 Feb scribe: Howard Katz ACTION: KendallC to Announce the protocol spec DONE The follwoing action items are continued without discussion: ACTION: DanC to ask Liam, via SemWeb CG, which XML groups might be interested in SPARQL result set WD ACTION: KendallC: to propose a solution to protocolRootReferent ACTION: SteveH to to propose tests for str() and =~ ACTION: SteveH to to revise test manifest w.r.t. "background" and named graphs ACTION: DanC: suggest formal definitions for SOURCE ACTION: DaveB: discuss warnings in result set spec ACTION: DaveB to to propose source test to approve 2. F2F5 and F2F6 F2F5 is 27 February - 1 March 2005 Cambridge, MA part of W3C Technical plenary DAWG registrations http://www.w3.org/2002/09/wbs/35125/TP2005/registrants#dawg Review of WG members against attendees above. Includes the list of observers, 11 at this time. [More observers than WG registrants :) - scribe] Regrets: AlbertoR, DaveB, HowardK Tentative/indirect regrets: BryanT Partial conflict; KendallC (with a NASA interop session in SWIG), DanC (1/2 day) Possible regrets: JanneS Discussion of remote dial-in possibilities. Requested by AlbertoR, AlbertoR. Maybe 2-3 hours max each day, DanC to consider and to make any AV requests. F2F6 ACTION: DanC to consider Asemantics hosting proposal w.r.t. WG schedule http://lists.w3.org/Archives/Public/public-rdf- dawg/2005JanMar/0072.html ACTION: SteveH to propose to host in Southampton right after XTech ACTION: PatH to propose to host in Florida Continued 3. valueTesting, XSCH ACTION: EricP and PathH will review XSCH draft document http://www.w3.org/2001/sw/BestPractices/XSCH/xsch-sw-20050127/ CONTINUED (with progress) SWBPD WG is expecting to decide to publish at their F2F at the Tech Plenary so would like feedback before then. ACTION: SteveH to review <http://www.w3.org/2001/sw/DataAccess/rq23/#tests> http://lists.w3.org/Archives/Public/public-rdf-dawg/2005JanMar/0114.html DONE ACTION: JosD to review <http://www.w3.org/2001/sw/DataAccess/rq23/#tests> http://lists.w3.org/Archives/Public/public-rdf-dawg/2005JanMar/0127.html CONTINUED (with partial progress) Discussion of constraints expressed as triples vs them in AND clause. Some things may not be (so easily) expressed as triples compared to them in the expression language. Experience here from n3. The examples in 0127 had literals as subjects so weren't good for sparql as defined now. Alberto presented some ical/RDF-cal examples using contraints into triple-patterns (e.g. dates comparinsons) at http://demo.asemantics.com/zparqler/examples/example8.html PREFIX ical: <http://www.w3.org/2002/12/cal/ical#> SELECT ?uri ?summary ?dtstart FROM <rdfstore://localhost:1234/xannouncements> WHERE (?uri ical:summary ?summary) (?uri ical:dtstart ?dtstart) (?dtstart op:dateTime-greater-than "2000-06-00T00:00:00A") Two problems here - literal subjects and "2000-06-00T00:00:00A" isn't a xsd:dateTime literal. Discussion of the set of predicates that sparql engines must understand - the op:* above. EricP reports that the current rq23 draft does not require recognising this. Alberto and DaveB remembered this being present once but it was removed by AndyS [for reasons the scribe lost track of in the discussion - interoperability?]. ACTION JosD: Make 2 test cases over the same data using the op:dateTime predicate and without using it. 4. SPARQL Query Language publication ACTION: EricP to to update rq23 w.r.t. BOUND/UNSAID DONE ACTION: EricP, make sure editor's draft as an inline issue (to be published) that we need to work this out CONTINUED Minor Syntax issues Seaborne, Andy (Friday, 11 February) http://lists.w3.org/Archives/Public/public-rdf-dawg/2005JanMar/0118.html AndyS asked for more responses on thsi thread to enable gather up possible syntax issues in order to address any needed changes. Discussion of OPTIONAL and [] both allowed at present. AndyS and EricP both expressed preferences for just having the OPTIONAL keyword. AndyS's current thoughts on the other thread issues are to delete [] for optionals, keep BOUND(?x), keep AND and keep functions syntax the same as written now in rq23. BOUND(?x)'s defined in 11.2.1.2 sop:bound http://www.w3.org/2001/sw/DataAccess/rq23/#func-isBound by defining the behavour of op:bound 5. Service Descriptions ACTION: SteveH to Write up a service description of features supported for his service http://lists.w3.org/Archives/Public/public-rdf-dawg/2005JanMar/0113.html DONE Steve's unsure about the dawg:usesOntology term - both the term name and the semantics. It seems useful to state "this thing knows about foaf" but what that means or if it implies understanding, isn't so clear and he requested help. Alternatives could be to allow multiple service points (nodes) that related to the main entry point but allowed different supported ontologies, query languages, results formats. ACTION: KendallC to to think about predicate to relate html-forms and svc descriptions, and how this goes into the spec CONTINUED ACTION: KendallC to Add section for service descriptions and put graph specifying in it to start it off CONTINUED ACTION: KendallC: discuss warnings in the protocol spec. CONTINUED ACTION: DanC to Write up definitive service concept CONTINUED ACTION: DanC to write up "sparqlParam" approach (reply to kendallC) CONTINUED ACTION: DanC to discuss accessingCollections in service description context CONTINUED ACTION: EricP: to inviestigate WSDL/SOAP encodings of SPARQL protocol CONTINUED but DanC has made some progress on this with Philippe Le Hégaret working with WSDL 2.0. 6. Documents to read for F2F5 meeting To be considered 1 week before the meeting, 21st February 2005. SPARQL Protocol http://www.w3.org/2001/sw/DataAccess/proto-wd/ The last substantive change before helsinki f2f but there is more stuff not yet commited and yet to add, expect to be available by 21st. SPARQL Variable Binding Results Not expected to be avail 21st. DaveB to try to deliver updated VBR by 28th Feb SPARQL Query Language Document published this week will be on the reading list for F2F5. The Appendix on N3 syntax alternatives may be at risk although EricP may have time to work on them before publication this week. DanC noted that he is trying to put Turtle out as a Semantic Web Interest Group note. Turtle is used in DAWG test cases and in our documents (above) mostly in a cutdown form as abbreviated triples. Adjourned
Received on Tuesday, 15 February 2005 16:27:52 UTC