I'm currently trying to use Jena SDB as a triple store and get very poor triple insert performance. Any help in speeding things up would be appreciated. The situation: I need to …

I'm trying to get the most recent articles on a subject out of http://pubmed.bio2rdf.org/sparql. I can get a list of articles on a subject but as soon as I try to order by date the …

I'm sure the performance of reasoners and triple stores will continue to improve through better hardware, better optimized software and improved reasoning logic. But the complexit …

I am currently constructing an OWL ontology, which - until very recently classified rapidly using the Pellet reasoner. However, since the introduction of several new classes, the r …

I'm running SPARQL queries like: prefix ch: <http://pele.farmbio.uu.se/chembl/?> select count(?s) where { ?s a ch:Compound . } or any other 'a' query asking all Resourc …