- From: Eric Prud'hommeaux <eric@w3.org>
- Date: Fri, 16 Apr 2004 13:58:10 -0400
- To: Howard Katz <howardk@fatdog.com>
- Cc: "Seaborne, Andy" <andy.seaborne@hp.com>, RDF Data Access Working Group <public-rdf-dawg@w3.org>
On Fri, Apr 16, 2004 at 10:08:15AM -0700, Howard Katz wrote: > > Jonathan's is the XQuery with Functional Accessor stuff? I saw the > presentation but couldn't find anything else online. That mostly came from Jerome Simeone, but at a BOF at XML2003, Jonathan said that XQueryFA was in the spirit of his conclusions in his paper The Syntactic Web [4]. > On a different but related topic, since we don't have time allocated for it > on the agenda, would anyone be interested in a BOF for a freeform discussion > on XQuery/RDF on the Thursday evening say (after a nice day of getting to > know one and other and a pleasant dinner)? Personally, I generally get more > questions answered in one hour of face-to-face than in two or three weeks of > email and/or blindly stumbling around the web. Though it will be before the lightening talks, I can imagine it being fruitful. I'm game. > > -----Original Message----- > > From: public-rdf-dawg-request@w3.org > > [mailto:public-rdf-dawg-request@w3.org]On Behalf Of Seaborne, Andy > > Sent: Friday, April 16, 2004 8:16 AM > > To: RDF Data Access Working Group > > Subject: RE: Supplemental XQuery reading list > > > > > > > > See also Jonathan Robie's talk at the tech plenary: > > > > http://www.w3.org/2004/Talks/tp-robie/ > > > > He and I talked about this beforehand - the use of XQuery to extract > > information from RDF sources and create XHTML/XML looks like a good use of > > XQuery. The approach is to provide accessors into the RDF graph (the > > abstract syntax, not the concrete RDF/XML syntax). > > > > Andy > > > > -------- Original Message -------- > > > From: Howard Katz <> > > > Date: 16 April 2004 15:53 > > > > > > > I can't speak to Andy's agenda, but one point that's been kicking > > > > around in the XQuery/RDF Query arena for a while is that XQuery can be > > > > used to express SQL queries so it must be able to express RDF > > > > queries. > > > > > > It can, if you're able to work out a mapping from the RDF data model > > > into > > > the XQuery data model, which is basically the XML Infoset + XML Schema > > > support + support for multiple documents. > > > > > > I'm finding myself quite interested in the inverse problem: would it be > > > possible and useful to be able to map from the XQuery surface language > > > into > > > an underlying RDF graph-based data model, so that XQuery syntax can be > > > used > > > to interrogate an RDF data store more or less directly? In other words, > > > can > > > we swap out XQuery's underlying XML-based data model and slide in an > > > RDF-based one in its place so that we don't have to do the mapping to > > > XML? > > > I'll be talking about this after Amsterdam. > > > > > > > I've seen a couple approaches that I believe workable [1] > > > > [2], but would like to see how people solve the problem for SQL. > > > > > > I've given a few pointers in my response to Andy's email re SQL-to-XML > > > mappings for XQuery. > > > > > > > I suspect that in standardizing an RDF query language we are going > > > > beyond where existing SQL mappings to XQuery have gone in that we want > > > > *one* mapping to XQuery that operates on XQuery+whatever > > > > implementations from different vendors. Does such a "standard" mapping > > > > to SQL exist? > > > > > > I'm not sure what you mean by the last, Eric. Can you explain a bit > > > more? > > > > > > Howard > > > > > > > [1] http://www.w3.org/2001/11/13-RDF-Query-Rules/#XQueryFA > > > > [2] http://www.w3.org/2001/11/13-RDF-Query-Rules/#TreeHugger > > [3] http://www.w3.org/2004/Talks/tp-robie/ [4] http://www.idealliance.org/papers/xml2001/papers/html/03-01-04.html -- -eric office: +81.466.49.1170 W3C, Keio Research Institute at SFC, Shonan Fujisawa Campus, Keio University, 5322 Endo, Fujisawa, Kanagawa 252-8520 JAPAN +1.617.258.5741 NE43-344, MIT, Cambridge, MA 02144 USA cell: +1.857.222.5741 (does not work in Asia) (eric@w3.org) Feel free to forward this message to any list for any purpose other than email address distribution.
Received on Friday, 16 April 2004 13:58:12 UTC