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Re: Announce: Linked Data Patterns book

From: Bernard Vatant <bernard.vatant@mondeca.com>
Date: Wed, 7 Apr 2010 11:33:48 +0200
Message-ID: <j2s9d93ef961004070233ka794eb8fw5b740e54423f9b49@mail.gmail.com>
To: Ian Davis <lists@iandavis.com>
Cc: Peter Ansell <ansell.peter@gmail.com>, Leigh Dodds <leigh.dodds@talis.com>, Linking Open Data <public-lod@w3.org>
Interesting exchange

Following Ian here to say that quads are not necessary. There are some
workarounds coming to mind.

Any linked data consumer can at any moment dereference the URI to sort out
the original (aka authoritative) description triples from those asserted by
some other source.
When mashing/meshing descriptions from different sources, if one does not
want to nitpick on who said what, but wants to keep track of the used
sources nevertheless, using dcterms:source at either RDF document or
resource level can do it. Keeping rdfs:isDefinedBy for the original source
as asserted by the URI reference if needed.


Ian Davis <lists@iandavis.com>

> On Wed, Apr 7, 2010 at 12:14 AM, Peter Ansell <ansell.peter@gmail.com>
> wrote:
> > "It is entirely consistent with the Linked Data principles to make
> > statements about third-party resources."
> >
> > I don't believe that to be true, simply because, unless users are
> > always using a quad model (RDF+NamedGraphs), they have no way of
> > retrieving that information just by resolving the foreign identifier
> > which is the subject of the RDF triple. They would have to stumble on
> > the information by knowing to retrieve the object URI, which isn't
> > clear from the pattern description so far. In a triples model it is
> > harmful to have this pattern as Linked Data, as the statements are not
> > discoverable just knowing the URI.
> >
> Can you elaborate more on the harm you suggest here?
> I don't think we need to limit the data published about a subject to
> that subset retrievable at its URI.  (I wrote a little about this last
> year at http://blog.iandavis.com/2009/10/more-than-the-minimum )
> I also don't believe this requires the use of quads. I think it can be
> interlinked using rdfs:seeAlso.

Bernard Vatant
Senior Consultant
Vocabulary & Data Engineering
Tel:       +33 (0) 971 488 459
Mail:     bernard.vatant@mondeca.com
3, cité Nollez 75018 Paris France
Web:    http://www.mondeca.com
Blog:    http://mondeca.wordpress.com
Received on Wednesday, 7 April 2010 09:34:22 UTC

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