On 23/04/14 00:22, ameni ameni wrote:
How can i get accesed to the conclusion of SWRL rules from Jena API ?
Asking the same question multiple different ways, especially when it has
already been answered, is not good practice and doesn't encourage people
to try to help you. Please don't.
To summarize and explain the responses you've had so far:
1. Pellet includes some support for SWRL but is not part of the Jena
project. For all help on how to configure it and debug it you are better
off asking on the pellet support list.
2. From Jena's point of view the reasoner simply makes additional
inferred triples available in the model. You can then query for these
triples using the API or SPARQL in the normal way.
3. Your specific example was of the form:
blah -> adult(?x)
In terms of the RDF model this will, if it fires, create inferred
triples of the form:
x rdf:type ex:Adult
So a query like:
SELECT ?x WHERE { ?x a ex:Adult }
is appropriate.
We can't tell you what ex: is, that's in your data. If you can't figure
it out then you could try to run a query like:
SELECT DISTINCT ?type WHERE { [] a ?type }
over your inferred model and see what ?types are present.
Or if your data is not too big:
SELECT * WHERE { ?x a ?type }
to find the type of everything.
If there is nothing related to Adult in there then perhaps your rule
hasn't fired.
Dave
