Re: Partial and Overspecified Reifications in RDF

On Wed, Jun 15, 2011 at 5:26 PM, Dave Kolas <dkolas@bbn.com> wrote:

> Hi,
>
> I am currently adding support for efficient storage and retrieval of
> reifications to our triple-store Parliament.
>
> I am currently concerned about how the implementation will handle partial
> reifications, i.e,:
>
> ex:Stmt1 a rdf:Statement;
>   rdf:subject ex:A;
>   rdf:predicate ex:B .
>
> and how it will handle overspecified reifications:
>
> ex:Stmt1 a rdf:Statement;
>   rdf:subject ex:A;
>   rdf:predicate ex:B ;
>   rdf:object ex:C ;
>   rdf:object ex:D .
>
> The RDF specification does not seem to say whether this is a valid use of
> the reification vocabulary.
>

It is. http://www.w3.org/TR/rdf-mt/#Reif says: "the reification vocabulary
has no effective semantic constraints on it, other than those that apply to
an rdf-interpretation <http://www.w3.org/TR/rdf-mt/#rdfinterpdef>"

Thus I am wondering whether A) this is considered valid RDF, and B) if there
> any reasonable use cases for these constructs.
>

A) yes
B) I have not seen any

Regards,
Alan


>
> I appreciate any input you might have.
>
> Thanks,
> --Dave--
>
>
>
>