On Monday, March 31, 2014 7:09 PM, Peter F. Patel-Schneider wrote:
> In actuality, defining things like owl:sameAs is indeed extending RDF.
> Defining things in terms of OWL connectives also goes beyond RDF. This
> is different from introducing domain predicates like foaf:friends.
> (Yes, it is sometimes a bit hard to figure out which side of the line
> one is on.)
Peter, could you please describe where you draw the line? I generally look at
RDF as a data model and in those terms nothing that has been suggested really
extends RDF. You probably have something related to semantics in mind, please
note however that Ruben (please correct me if I'm wrong) didn't suggest to
change RDF's semantics, i.e., the triples
</people/markus> foaf:knows [
hydra:memberOf </people/markus/friends>
] .
enable no inferences to be made on /people/markus/friends. More specifically,
they do not say that the members of /people/markus/friends are related to
/people/markus via foaf:knows.
But perhaps you had something completely different in mind!?
--
Markus Lanthaler
@markuslanthaler
