On 05/02/13 11:29, Rodrigo Jardim wrote:
Maybe using Pellet Reasoner + Jena.
--
Rodrigo
Em 05/02/2013 08:23, Vishal Sinha escreveu:
Can I do this in Jena? How?
In SPARQL:
{
?x a ?T .
?T rdfs:subClassOf* :Politician
}
with the subclass relationships in the database. Even a different graph:
{
?x a ?T .
GRAPH <theOntologyGraph> { ?T rdfs:subClassOf* :Politician }
}
Order of patterns may affect the speed or the query - experiment.
Or expand the data once on loading:
Use
riotcmd.infer --help
and
{
?x a :Politician .
}
Or
The Jena rule based reasons also do subClassOf
Andy
----- Forwarded Message -----
*From:* Kingsley Idehen <[email protected]>
*To:* [email protected]
*Sent:* Monday, February 4, 2013 5:46 PM
*Subject:* Re: Inference Reqults according to DBPedia Ontology
On 2/4/13 2:25 AM, Vishal Sinha wrote:
Hi,
I am creating a local RDF store, and storing some information in it
myself.
For example,
- "Angela Merkel is a Chancellor"
- "Barack Obama is a President"
In DBPedia ontology it is stated that,
Chancellor is subclass of Politician. President is also subclass of
Politician.
When I make a SPARQL query to my local RDF store, I want to get
inference result according to DBPedia
OWL ontology.
In this case, if I ask give me all politicians, it should give me -
Angela Merkel and Barack Obama.
My Question: Should I keep a copy of DBPedia ontology in my RDF
store? Or what else could I do?
Thanks.
For inference to work the underlying axioms need to be processed.
Thus, you will need to read the DBpedia ontology, one way or the other.
Short answer: Yes.
--
Regards,
Kingsley Idehen
