How to make an individual of one class be individual of a superclass in Jena ?

Question

I'm making an automatic instanctiation of an ontology. let says Person with his subclass FEMALE and MALE.

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During the instanciation, I used can create instances of the class FEMALE and MALE.

for example

OntModel model = // Jena model
String   NS    = // the name space

person0 = model.createIndividual(NS + "Allison", "FEMALE");

How could I add the fact that Allisson in person0 is also an individual of the class PERSON.

I know that a reasoner (Pellet for example) could help here but. but in my case there is a huge number of individuals to instanciate, so the reasoning step become too long for me (about more than 10 hours)

thanks for any help !

Answer 1

0

I don't exactly understand the problem, and in my opinion such framework related questions should be asked on the corresponding mailing list(if such exist) but anyway:

Every time you create an individual you would also have to assert it to all superclasses, which I guess you could get by inference. Maybe you can use the method

Individual::addOntClass(Resource cls)

link

answered 08 Nov '12, 10:50

AKSWMember
965●1●7
accept rate: 30%

edited 08 Nov '12, 10:50

Answer 2

Depending on your model size, using a reasonner may be very time consuming. For some of my developments, I had to avoid using a reasonner. Instead of that, I have run a SPARQL CONSTRUCT query to manage adding the new "infered" triples.

like @AKSWMember said, if your need is only to assert that an individual from FEMALE is also an individual of PERSON, you could assert 2 rdf:type to the same ressource.

How to make an individual of one class be individual of a superclass in Jena ?

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