Kevin; The query will work if you define multiple domain properties
instead of using owl:unionOf. So the property would be defined as:
:aProp rdfs:domain :MyClass .
:aProp rdfs:domain :MyOtherClass .
This states that a property's domain can be either members of :MyClass
or members of :MyOtherClass.
This is different from the semantics of "MyClass or MyOtherClass" (in
Manchester syntax), which states that the domain is an unnamed class
whose members are the union of :MyClass and :MyOtherClass:
:aProp rdfs:domain
[ a owl:Class ;
owl:unionOf (:MyClass :MyOtherClass)
] .
Note the unnamed class - denoted by the Turtle bnode syntax ([a
owl:Class .]). I'm thinking that the first of the two was your
original intent, and using that model your query will work across
multiple definitions of rdfs:domain for the property.
-- Scott
On Oct 14, 1:14 pm, Kevin Matthews <[email protected]> wrote:
> I have a query that returns all the subproperties of a give class:
>
> SELECT *
> WHERE {
> :MyClass (rdfs:subClassOf)* ?parent .
> ?property rdfs:domain ?parent .
> ?property a owl:DatatypeProperty .
>
> }
>
> That works just fine. However, recently, one of the subproperties of
> MyClass also became a subproperty of a new class. So the rdfs:domain
> attribute of the subproperty is now "MyClass or MyOtherClass". This
> has broken my query. The clause "?property rdfs:domain ?parent"
> eliminates the subproperty from the result set because the domain is
> no longer singular. It is a set.
>
> How can I write a query that returns all subproperties that contain
> MyClass in their rdfs:domain, even when the rdfs:domain is a set?
>
> I am fine if we have to write a separate query that only deals with
> rdfs:domains that are sets. I can leave my old query alone, and
> append the results of the set-only query.
>
> Thanks,
>
> Kev
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