- From: Eric Prud'hommeaux <eric@w3.org>
- Date: Sat, 22 Mar 2003 15:37:05 -0500
- To: Uche Ogbuji <uche.ogbuji@fourthought.com>
- Cc: Libby Miller <Libby.Miller@bristol.ac.uk>, Dan Brickley <danbri@w3.org>, www-rdf-rules <www-rdf-rules@w3.org>
On Sat, Mar 22, 2003 at 01:22:09PM -0700, Uche Ogbuji wrote: > Eric Prud'hommeaux wrote: > > >On Fri, Mar 21, 2003 at 01:08:42PM -0700, Uche Ogbuji wrote: > > > > > >>>I think Versa might be one of these 'single arc' types - see > >>>http://uche.ogbuji.net:8080/uche.ogbuji.net/tech/rdf/versa/versa.doc?xslt=/ftss/data/docbook_html1.xslt > >>> > >>>and especially > >>> > >>>http://uche.ogbuji.net:8080/uche.ogbuji.net/tech/rdf/versa/versa-by-example.txt > >>> > >>> > >>Versa does not not work naturally with cartesian products, but I > >>think that any query of the sort Eric charaterizes can be expressed > >>in Versa, though the results are usually not pretty. > >> > >> > > > >If you show me how, I'll put it in the query survey. > > > > > > I think I've lost the thread. I thought you were talking about this > single/multi arc distinction in the archives. Did you post a paritcular > example of a query which requires aggregation from a cartesian product? > If so, please re-post it, or post a pointer to it, and I'll see if I can > work ut a Versa equivalent. Oops, should have given you the pointer -- I slacked for a moment and paid the price. There is a query defined at the top of a query/rules survey [1] which i use to compare the different protocol query languages. If you express this query in versa, I'll have what I need to drop it into the survey. [1] http://www.w3.org/2001/11/13-RDF-Query-Rules/ -- -eric office: +1.617.258.5741 NE43-344, MIT, Cambridge, MA 02144 USA cell: +1.857.222.5741 (eric@w3.org) Feel free to forward this message to any list for any purpose other than email address distribution.
Received on Saturday, 22 March 2003 15:37:08 UTC