- From: Ron Alford <ronwalf@wam.umd.edu>
- Date: Fri, 20 Sep 2002 15:16:54 -0400 (EDT)
- To: www-rdf-interest@w3.org
I'm forwarding this along from Dr. Hendler, since his tries weren't going through. -- Ron Alford, KB0NUV http://volus.net/~ronwalf ---------- Forwarded message ---------- Date: Fri, 20 Sep 2002 12:54:43 -0400 From: Jim Hendler <hendler@cs.umd.edu> To: rdf-interest@w3.org Cc: semweb@mindswap.org Subject: OpenSource release of Parka, University of Maryland Database backend (Apologies if you get this twice - URIs were stripped off previous sending) We are pleased to announce the opensource release [1] of the (no-longer patent-pending) Parka system. The new version, ParkaSW, is aimed at supporting RDF use by being a scalable backend technology for the storage and retrieval of RDF graphs. Parka's representations are still more tailored for the earlier SemWeb language SHOE [2], but it also makes a capable RDF tool - see [3] for example. Parka's inputs are triples, and the builder file can easily be created from RDF. Parka also includes inheritance algorithms and others that will be of use for OWL-lite and RDFS users, however they currently require some preprocessing algorithms. We hope to release a new version in the next few months which will more directly support RDFS and OWL-lite. The current implementation makes ParkaSW unable to contain more than about 2.5E6 (2.5 million) triples, we are also working on a new version that will remove that limitation. Parka currentl benchmarks faster than other RDF databases due to its innovative way of storing triple tables. Note, however, that for RDF DBs that have many different properties (more than 300) Parka can run up against file limitations on some Unix implementations - thus to handle a large number of relations in a single graph, some parameters needs to be munged. Contact us if you get into that situation (most DBs we've tested on have far less properties than that in any graph). -Jim Hendler for the MINDSWAP research group (http://www.mindswap.org) note: ParkaSW derives in part from Parka-DB(TM) which is still available for licensing - see the details on the release page [1]. [1] http://www.mindswap.org/2002/parka [2] http://www.cs.umd.edu/projects/plus/SHOE [3] http://www.cs.umd.edu/projects/plus/Parka -- Professor James Hendler hendler@cs.umd.edu Director, Semantic Web and Agent Technologies 301-405-2696 Maryland Information and Network Dynamics Lab. 301-405-6707 (Fax) Univ of Maryland, College Park, MD 20742 240-731-3822 (Cell) http://www.cs.umd.edu/users/hendler
Received on Friday, 20 September 2002 15:37:52 UTC