Hi Chris,
How are you connecting Jena to Virtuoso, is this via is http client to the
Virtuoso SPARQL endpoint or via the Virtuoso Jena Provider ? Also confirm the
version of Virtuoso being used and if using the Jena Provider the version of it
…
Best Regards
Hugh Williams
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> On 11 Mar 2015, at 16:23, Chris Rimmer <chris.rim...@67bricks.com> wrote:
>
> I am running the following query to give me a list of triples which exist in
> one graph but do not exist in another:
>
> SELECT ?s ?p ?o
> WHERE {
> GRAPH ?from {
> ?s rdf:type skos:Concept .
> ?s ?p ?o .
> }
> MINUS {
> GRAPH ?to {
> ?s ?p ?o .
> }
> }
> }
>
> This works as expected when run via the Conductor SPARQL interface (with
> ?from and ?to bound correctly) and also works via Jena operating against an
> in-memory TDB datastore. But when run via Jena against Virtuoso I get no
> results at all.
>
> Any clue as to what is going wrong here?
>
> Thanks
>
> Chris
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