About getting nodes in obographs about obographs

[yy20716]

I am sorry but I realized that I put a wrong tag in the above example. I made a copy-and-paste error, i.e.

   <owl:Class rdf:resource="http://purl.obolibrary.org/obo/MONDO_0005017">

but this should be

   <owl:Class rdf:about="http://purl.obolibrary.org/obo/MONDO_0005017">

In other words, because of this resource tag, owlapi does not consider MONDO_0005017 as a class, so obograph does not basically execute the codes that parse OWLDeclarationAxiom and convert them as nodes.

Nonetheless, it would be more intelligent if we could add codes that treat subjects and objects as classes when we encounter rdfs:subClassOf property. The current codes only does this for subject; can I add codes that treat the object as class as well? Thank you.

[cmungall]

This sounds like a bug

[balhoff]

I don't think it's valid RDF/XML to use rdf:resource here. If it is used to indicate the object of a predicate, the predicate is the element name. But owl:Class is not a predicate. At least that's my reading of https://www.w3.org/TR/rdf-syntax-grammar/#section-Syntax-empty-property-elements

[yy20716]

Thanks for your clarification. Yes, in other words, owlapi's behavior and interpretation is correct, i.e. rdf:resource should not be used there.