owlprotegedlquery

How to query for object properties of individuals using OWL DL Query

Say I have a relationship between two individuals such that "Bob works for MiningCo."

I want to be able to ask it "Who does Bob work for?" but it seems like in OWL DL the only question I know how to to write is "Who works for MiningCo?" i.e.

worksFor some {MiningCo}

Is there a way to ask a question where I can get an individual object when I query with a individual subject and a predicate?

Solution

  • DL queries are Manchester syntax class expressions. Manchester syntax is a user-friendly syntax for OWL ontologies. OWL allows to define inverse properties. Thus: 

    inverse worksFor some {Bob}

    Is there a way to ask a question where I can get an individual object when I query with a individual subject and a predicate?

    You could also use the SPARQL plugin or the Snap SPARQL plugin:

    SELECT * WHERE {:Bob :worksFor ?object}

    The difference is that the latter supports querying over inferred knowledge.