You may use federated query to query and modify the triple in the shared TDB.
Your query should look like :
(Assuming he request is executed against TDB A)
SELECT ?o
WHERE {
?s1 ?p1 ?o
SERVICE <endpoint adress of TDB S> { ?s ?p ?o }
}
I hope this will help you.
Arthur
________________________________
De : ""Dr. André Lanka"" <[email protected]>
À : [email protected]
Envoyé le : Lundi 9 septembre 2013 20h38
Objet : Shared composition of TDB datasets
Hello Jena community,
I'm looking for a possibility to SPARQL two different TDB backed
datasets within one query. The background is that I have a few TDB
stores (say A and B) and one special TDB store S containing a few
triples that I want to "share" with the other stores.
For instance I want to do something like this:
SELECT ?o WHERE { GRAPH <S> { ?s ?p ?o. } GRAPH <A> { ?s1 ?p1 ?o.} }
In addition, S needs to be writeable and the changes need to be promptly
visible for other queries. Even if I change A to B in the above example.
I know about named graphs but unfortunately they are no option in our
scenario. Could I do it by using assemblers? Or is there any other
possibility?
We use the current versions of Jena/ARQ/TDB in pure Java.
Thanks in advance
André
--
Dr. André Lanka * 0178 / 134 44 47 * http://dr-lanka.de
