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Re: RE : [mawg] [rdfs taskforce] action-249: RDFS version of ma-ont availble

From: Pierre-Antoine Champin <pierre-antoine.champin@liris.cnrs.fr>
Date: Tue, 15 Jun 2010 11:07:48 +0200
Message-ID: <4C1742E4.5090002@liris.cnrs.fr>
To: "Evain, Jean-Pierre" <evain@ebu.ch>
CC: vmalaise <vmalaise@few.vu.nl>, "Chris.Poppe@UGent.be" <Chris.Poppe@UGent.be>, "Bailer, Werner" <werner.bailer@joanneum.at>, Tobias B├╝rger <tobias.buerger@salzburgresearch.at>, "public-media-annotation@w3.org" <public-media-annotation@w3.org>
(catching up with the discussion)

On 12/06/2010 09:03, Evain, Jean-Pierre wrote:
> Yes, I have introduced some fucntional properties. At least things
> like an identifier dataproperty shall be functional.

I disagree. A resource may have serevarl identifiers (especially if you
allow different kinds of identifiers, like URI or ISBN...).

ma:identifier should be *inverse functional* though, which is how it can
*identify* a resource.

NB: although even that can be over-commitment. I once have been told
that ISBN number can be reused in some situtation, making it non
inverse-functional... But this is really a pathological case, I think...

  pa
Received on Tuesday, 15 June 2010 09:08:25 GMT

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