> Yes they have, what you're saying is wrong. See > http://www.rdfhdt.org/hdt-binary-format/#triples That's what the .hdt.index > file is about, to store more index permutations. Ok, sorry - I didn't read all of the online documents - just the published papers and the one PhD thesis. And least there, it wasn't mentioned or maybe I just overlooked it.
> I think the only remaining open questions are: > > - since the problem was not with the OFFSET, would the query "SELECT ?s FROM > <wikidata> WHERE ..." also fail to terminate with a TDB-backed namedGraph > (instead of HDT)? I can't give you any valid answer here, I'm not the developer of the Jena API - Andy knows this for sure. But, since the other query is working, what speaks against using the GRAPH notation to query a named graph? > > - is there any improvement that can be added to Jena to solve these type of > queries faster, or is it just the way it is and nothing can be done about it? Again, Andy or some of the other core developers can give you more feedback. I'm just a happy Jena user and still learning about RDF, SPARQL, triple stores and all the other things. Lorenz
