Hi,
I am working on a project focused on OWL. Recently we came up with the
requirement to deal with multiple owl ontologies interconnected with each other
using the named graph approach.
I have two questions on the matter:
1-Is there any tool (i suppose triple store) that support that ?( I understood
that when it comes to pure RDF, Jena TDB could handle that. Just not sure
upfront with OWL DL. Although i suppose so….)
2-I’m currently heavily relying on OWL-API and Pellet, can TBD allow me to keep
working with the OWL API, to update my ontologies at runtime, while providing
me with the triple store management ?
I saw some interesting code on the pellet website that show some
interoperability between Jena and the OWL-API trough the Pellet API. I just
don’t know how effective that can be:
>>>>>
How can I run SPARQL queries with OWLAPI?
There is no native SPARQL support in OWLAPI. However, a Jena model can be
created with the contents of an OWLAPI reasoner so SPARQL query answering can
be done on the Jena model.OWLAPI reasoner and Jena model can be queried
together but all updates should be done on theOWLAPI ontology. The following
snippet shows the general idea behind this approach:
// import com.clarkparsia.pellet.owlapiv3.PelletReasoner;
// import com.clarkparsia.pellet.owlapiv3.PelletReasonerFactory;
// Create OWLAPI ontology as usual
OWLOntology ontology = ...
// Create Pellet-OWLAPI reasoner (non-buffering mode makes synchronization
easier)
PelletReasoner reasoner =
PelletReasonerFactory.getInstance().createNonBufferingReasoner(
ontology );
// Get the KB from the reasoner
KnowledgeBase kb = reasoner.getKB();
// Create a Pellet graph using the KB from OWLAPI
PelletInfGraph graph = new org.mindswap.pellet.jena.PelletReasoner().bind(
kb );
// Wrap the graph in a model
InfModel model = ModelFactory.createInfModel( graph );
// Use the model to answer SPARQL queries
The model created this way cannot be used to answer SPARQL queries that query
for RDF syntax triples, e.g. SELECT * WHERE { ?x owl:onProperty ?p }.
