Re: model theory for RDF/S

One more problem with the model theory.

Even if all aspects of reification and containers are removed from RDF>
There is still the matter of rdf:type

In ``5. Formal Model for RDF'' of M&S, there are the requirements that 

 5. There is an element of <I>Properties</I> known as RDF:type.

 6. Members of <I>Statements</I> of the form {RDF:type, sub, obj} must
    satisfy the following: sub and obj are members of <I>Resources.</I>
    [...] 

These conditions are not captured in the model theory.  

I do not know the consequences of these omissions on the characterisation
of entailment in RDF in Section 3 of the model theory.

Peter F. Patel-Schneider