I try to get all 'subclass-of' axioms of an ontology. I tried by using the following statement.
MyOntology.getAxioms(AxiomType.SUBCLASS_OF));
Effectively, it returns the ontology 'subclass-of' axioms, except for the first 'subclass-of' axiom which links OWL:Thing with my first ontology class.
I cannot understand why this link isn't taken into account in that case ?
Please, is there any way to get all 'subclass-of' axioms including those linking OWL:Thing with other classes ?
You're right, I've just added them manually through protégé and it works. Thank you so much
Hi,
There is another issue here: the code that you are using is retrieving only the explicitly asserted subclassOf relations (that's why when you use Protegé to assert them, you can retrieve them). If you want to retrieve the inferred taxonomy, you should use a reasoner, and work with the OWLReasoner instead (or along with) of the OWLOntology. The DL reasoner infers the actual hierarchy that the ontology is modeling, and allows you to navigate through it .
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