On 24/10/17 23:51, Martynas Jusevičius wrote:
Hi,
I thought I understood how OntClass.listSuperClasses() works, but maybe I
don't.
I have such a class structure in my ontology (superclass is at the top):
3. https://www.w3.org/ns/ldt/document-hierarchy/domain#Item
2. http://atomgraph.com/ns/platform/domain#Item
1. https://localhost/admin/ns#AgentItem
Yet when I'm debugging, I can see the pair-wise relationships, but not the
chain all the way up from 1 to 3:
1. getOntology().getOntModel().getOntClass("
https://localhost/admin/ns#AgentItem
").listSuperClasses(false).toList().toString()
[https://localhost/admin/ns#ItemOfAgentContainer,
http://atomgraph.com/ns/platform/domain#Item]
2. getOntology().getOntModel().getOntClass("
http://atomgraph.com/ns/platform/domain#Item
").listSuperClasses(false).toList().toString()
[https://www.w3.org/ns/ldt/document-hierarchy/domain#Item]
I can see that within the method hasPropertyValue(
getProfile().SUB_CLASS_OF(), "SUB_CLASS_OF", cls ) returns false.
Why is that so? Is my usage wrong?
Additional info:
getOntology().getOntModel().getSpecification().getProfile() == OWLProfile
getOntology().getOntModel().getSpecification().getReasoner() == null
If I recall correctly the OntModel API is designed to retrieve whatever
is stated within the underlying model. The notion was that there was no
point in having the OntModel API replicate what reasoning does.
So to see the subclass closure you need to have a sufficient reasoner
configured.
Dave
