Support for new specifications in OWL 2 #903
Description
Does rdflib currently support adding data ranges as per OWL2 specifications? For Example, can you create a custom datatype like:
g.add((URIRef(ns+"Answer"), RDF.type, RDFS.Datatype)) g.add((URIRef(ns+"Answer"), OWL.unionOf, (XSD.string, XSD.boolean, XSD.positiveInteger))) g.add((URIRef(ns+"answer_value"), RDF.type, RDFS.Property)) g.add((URIRef(ns+"answer_value"), RDFS.domain, URIRef(ns+"Question"))) g.add((URIRef(ns+"answer_value"), RDFS.range, URIRef(ns+"Answer")))
Activity
MuraliKrishna26 commentedon May 30, 2020
Hey DhansheeA, I have worked on the issue and fixed it. Now you can add more than one data-type(or any property) at once as you mentioned in the code.
The below line will work fine
g.add((URIRef(ns+"Answer"), OWL.unionOf, (XSD.string, XSD.boolean, XSD.positiveInteger))
I have observed there may be a typo in the line :
g.add((URIRef(ns+"answer_value"), RDF.type, RDFS.Property))
Property term is defined in RDF class but not in RDFS.
ashleysommer commentedon Aug 5, 2020
@MuraliKrishna26
RDF.type is correct. Even though it is specified in the RDFS spec, the
typepredicate intentionally usesrdf:type.See https://en.wikipedia.org/wiki/RDF_Schema
DhanshreeA commentedon Aug 18, 2020
@ashleysommer I believe @MuraliKrishna26 is talking about
RDF.Propertyand is correct in pointing out that Property is in RDF Class and not RDFS. :) I am a bit rusty on the spec itself, but at least within this Python implementationRDFS.Propertydoes not seem to be the case.ashleysommer commentedon Aug 18, 2020
Yes, you're right. I misread what @MuraliKrishna26 had written.