Hi James,

the OWL namespace itself adds this triple to declare rdfs:label (and  
some others) annotation properties.

But may I ask: why are you concerned that leaving OWL DL is a bad thing?

Thanks
Holger


On Jan 26, 2009, at 9:49 AM, James A Miller wrote:

>
> I don't know if this is a TBC question or not, but I will ask it  
> here first...
>
> In the OWL spec, 
> http://www.w3.org/TR/2004/REC-owl-ref-20040210/#AnnotationProperty-def 
> , it states:
> Annotation properties must not be used in property axioms. Thus, in  
> OWL DL one cannot define subproperties or domain/range constraints  
> for annotation properties.
>
> And the definition of rdfs:label, according to 
> http://www.w3.org/2000/01/rdf-schema#label 
>  is:
>
> <rdf:Property rdf:about="http://www.w3.org/2000/01/rdf-schema#label";>
>   <rdfs:isDefinedBy rdf:resource="http://www.w3.org/2000/01/rdf-schema# 
> "/>
>   <rdfs:label>label</rdfs:label>
>   <rdfs:comment>A human-readable name for the subject.</rdfs:comment>
>   <rdfs:domain rdf:resource="http://www.w3.org/2000/01/rdf-schema#Resource 
> "/>
>   <rdfs:range rdf:resource="http://www.w3.org/2000/01/rdf-schema#Literal 
> "/>
> </rdf:Property>
>
> Of course, it does not have an OWL annotation property type in an  
> RDFS definition.
>
> But in TBC, I see that rdfs:label is an owl:AnnotationProperty,  
> which is not in the rdfs definition.  I'm not sure where that came  
> from (TBC?), but I'm OK with that (I think), except it still has the  
> domain and range definition, which seems to be in conflict with OWL- 
> DL.
>
> I am not getting OWL Species of OWL-Full because of this, but I  
> don't understand why not.  Is this a hard-coded special case?  Or am  
> I misunderstanding something?
>
> Jim
>
>
> >


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