- From: Andreas Langegger <al@jku.at>
- Date: Thu, 27 Aug 2009 11:04:14 +0200
- To: Bernhard Schandl <bernhard.schandl@univie.ac.at>, Semantic Web <semantic-web@w3.org>, "Seaborne, Andy" <andy.seaborne@hp.com>
Hi Bernhard, yes. That would be an option... or putting all in a RDBMS and use Virtuoso RDF views or D2R. But I think it's too long-winded having to control some RDBMS-like schema if you're working with native RDF data. I would expect a more RDF-centric way where I can define indexes on subsets of triples, e.g. grouped by properties, etc. Would this be possible to implement for, let's say, Jena/TDB? Regards, Andy On Aug 27, 2009, at 9:32 AM, Bernhard Schandl wrote: > Hi, > >> I'm wondering for some time already if there is any triple store >> that allows to define custom indexes on special predicates or >> subsets of the whole set of triples/quads? All the existing stores >> I know index over all triples in different combinations (spo, >> pso, ...). Is there any research going on towards partial indexes >> over user-defined subsets of triples? E.g. an index over all >> xsd:dateTime literals. > > some time ago I was looking for triple stores that allow to > customize the database schema, e.g., that allow me to specify > something like "I want all foaf:Person resources together with their > foaf:firstName and foaf:surname stored in a designated (optimized) > table." If you are aware of any triple store aware of that > functionality I would be happy to know. > > Best, Bernhard > http://www.langegger.at ---------------------------------------------------------------------- Dipl.-Ing.(FH) Andreas Langegger FAW - Institute for Application-oriented Knowledge Processing Johannes Kepler University Linz A-4040 Linz, Altenberger Straße 69
Received on Thursday, 27 August 2009 09:04:57 UTC