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Re: [Linking-open-data] [ANN] MOAT

From: Alexandre Passant <alex@passant.org>
Date: Mon, 21 Jan 2008 14:27:22 +0000
Message-ID: <f0e160660801210627h1f81e004o6ae702cb220f104d@mail.gmail.com>
To: "Dave Reynolds" <der@hplb.hpl.hp.com>
Cc: semantic-web@w3.org, moat-dev@groupe.google.com

Hi,

On Jan 21, 2008 12:22 PM, Dave Reynolds <der@hplb.hpl.hp.com> wrote:
>
> Alexandre Passant wrote:
> > On Jan 21, 2008 12:36 AM, Frederick Giasson <fred@fgiasson.com> wrote:
> >> Hi,
> >>
> >>> Let's look at:
> >>> http://www.w3.org/TR/2005/WD-swbp-skos-core-guide-20051102/img/ex-sub.pn
> >>
> >> Yeah, so instead of a foaf:Document we would have a moat:Meaning. And
> >> instead of using a moat:concept, we would use a skos:subject.
> >>
> >> This could make sense intuitively. Would have to check further if it
> >> really does.
> > The problem here is that, again, the skos:subject range is a
> > skos:Concept, which will not allow people to use existing URIs that
> > are not defined as skos:Concept
>
> Not sure I agree. It means that any URI you use in this way can be
> inferred to also be a skos:Concept. It may not have been labelled as
> such in the original source but that doesn't necessarily cause a
> problem, open world assumption and all that.

I see what you mean, and it sounds ok theorically.
But in that case, using a skos:Concept in the ontology but telling to
users "use any URI you want" won't make sens I think. That's better to
tell them "use an URI" with an rdf:Resource range imho.
Moreover, some tools use domain / range of properties to filter
queries (eg: in ontology-based forms).
So using a skos:Concept may restrict the URIs to be retrieved.

> It *could* lead to a inconsistency if there are some conflicting axioms
> but that seems somehow unlikely. Are there any specific examples of a
> resource one might want to use as in this way where inferring they were
> also a skos:Concept would lead to an inconsistency?

In case I have my own ontology with a main Class that is
owl:disjointWith skos:Concept, because I explicitely do not want
people to use broader / narrower links between instances of this
class, it will fail.
Ok, this is just an example, but this is the kind of use case I want to avoid.

Best,

Alex.


>
> Dave
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Received on Monday, 21 January 2008 14:27:39 GMT

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