How to deal with class instances in Jena?

Question

In an ontology, suppose we have a class named "function" it has two instances "func1" and "func2" and suppose that the class has a data property "d".

My first problem is: how can I create individuals corresponding to either "func1" or "func2"?

My second problem is: In the inference, with Jena rules, I want to check if individuals created for "func1" have "d" greater than some value and if individuals created for "func2" have "d" greater than another value.

I already know how to work with classes, properties and individuals but when I got to the part having instances I got stuck.

Answer 1

It appears that Jena Library has no support for instances, which means that you can't use getInstance() and create individuals for that instance.

Instead of having instances func1 and func2 , you can make them as subclasses for the class function . This way, you can use getOntClass() and createIndividual() or getIndividual() as usual.