On 6/23/06, Jeen Broekstra <jeen.broekstra@aduna-software.com> wrote: > > For Sesame [2] we (actually, mostly Arjohn) are currently working on > creating an RDF query object model in Java of which the components map > 1:1 to relational algebra operators (actually this is very much based on > the work in the paper by Gutierrez that Olaf mentioned). > > This is work in progress though, I'm hoping to share more details when > we've got the implementation ready. > This is very similar to the approach that I've been working on all year in JRDF. I've attached a Progress Report I had to do for assignment outlining the ideas. I've done some more work on this since mainly expanding on the work done by Galindo-Legaria especially: "Using EELs, a Practical Approach to Outerjoin and Antijoin Reordering" and "View Matching for Outer-Join Views" (which has an approach of doing minimum union with SQL). I've yet to compare fully the approach listed by Gutierrez though (and might not get time considering I still have code to write).
Received on Saturday, 24 June 2006 02:14:11 UTC