Hi all please do NOT relay on "http://{stanbol}/sparql";. While this endpoint allows to perform SPARQL queries on Clerezza Graphs that are registered accordingly it is not meant to be meant as a general purpose SPARQL endpoint (at least not in its current state). The /sparql endpoint only exposes RDF graphs used by Stanbol. Currently this include the RDF graph of the Contenthub and also RDF graphs used by configured ClerezzaYards. The SolrYard (as used by default by the Entityhub) does NOT support SPARQL (as it is not really feasible to implement SPARQL on top of Solr).
Developers can also register their own Clerezza Graphs with the Stanbol SPARQL endpoint as described in [1]. If users do have use cases where they would like to use SPARQL please tell us. If their is a need for a SPARQL endpoint we can definitely improve the SPARQL capabilities of Stanbol. best Rupert [1] http://markmail.org/message/zm2tqlvs4flwvjyd On Sun, Mar 10, 2013 at 8:51 AM, Sergio Fernández <[email protected]> wrote: > Hi, > > > On 10/03/13 05:53, Mohammad Mourhaf AL Asswad wrote: >> >> I am trying to use Stanbol to index RDF files and query them using >> SPARQL. I managed to index RDF files but fails to query them. I >> cannot get to the http://{stanbol}/sparql to execute SPARQL queries. >> Do you know any useful source that explains in details how to do >> that? > > > Not sure what you want to do... SPARQL is a triple language not capable of > using those indexes, beyond optimizations under the hood on literal > comparisons. > > Rupert, correct me if I'm wrong. The semantic search infrastructure is there > not to just import data and query data as it is, but to allow using a RDF > dataset as knowledge base for applying different information extraction > techniques (entity lookup, disambiguation and so on....). > > Although the line is quite thin, and actually the technologies used probably > pretty the same (Solr and LDPath), for what (I understood) you're trying to > do, probably you would need to take a look other options, such as LMF: > > http://code.google.com/p/lmf/wiki/GuideSemanticSearch > > Hope this helps. > > Cheers, > > -- > Sergio Fernández > Salzburg Research > +43 662 2288 318 > Jakob-Haringer Strasse 5/II > A-5020 Salzburg (Austria) > http://www.salzburgresearch.at -- | Rupert Westenthaler [email protected] | Bodenlehenstraße 11 ++43-699-11108907 | A-5500 Bischofshofen
