[rdfweb-dev] advocating use of rdf:ID /rdf:aboutattributesonfoaf:Person tags

Nick Gibbins nmg at ecs.soton.ac.uk
Mon Aug 18 15:48:47 UTC 2003

Libby Miller <Libby.Miller at bristol.ac.uk> writes:

> I think the key issue is that a thing can't have two urls in RDF,
> but a foaf:Person could have two foaf:mboxes; so if someone uses the
> 'wrong' uri for you (and many people use many uris for the same
> person in their foaf files) - then RDF will see the different yous
> as distinct objects. Only smushing could make them the same.

> However, if your email address changes and you want people to use
> the new one, the migration path is simple: you put both in your foaf
> file, and smushers should then combine all the subjects of both
> addresses.  What you *can't* say in FOAF is that both these uris
> refer to you; also you can't say, please smush these things
> together, because only owl:inverseFunctionalProperties can do that
> as it stands, and the uri for an RDF resource isn't a property of
> that resource in that sense.

An interesting point. Although you can say that both these URIs refer
to the you via owl:sameAs, this would in general be unworkable because
you'd need to know all the different URIs that people were using to
refer to you in order to collapse the complete coreference set.

Nick Gibbins                                            nmg at ecs.soton.ac.uk
IAM (Intelligence, Agents, Multimedia)             tel: +44 (0) 23 80598347
Electronics and Computer Science                   fax: +44 (0) 23 80592865
University of Southampton

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