Re: RDF graph representation

 
> This may be a bit of sophistry, but since predicate may be used as
> subject (and object, I assume) in RDF, doesn't this make a
> node-arc-node representation of a triple invalid?

It's valid.

> For instance, how would you represent an OWL property restriction in
> such a graph mode? Wouldn't this mean that you'd have to point an arc
> into the middle of another arc?

For example, by using following three triples:

anAnonymousClass rdf:type owl:Restriction 

anAnonymousClass owl:onProperty aProperty

anAnonymousClass owl:allValueFrom aClass
[ or other possibility]


> Or am I missing something here? (which is probably the case) 
> 
> Illuminate me please..
> 


Yuzhong Qu