W3C home > Mailing lists > Public > www-webont-wg@w3.org > February 2003

Re: possible changes to abstract syntax and direct semantics to support annotations and fix problem with imports

From: Jos De_Roo <jos.deroo@agfa.com>
Date: Sun, 9 Feb 2003 16:20:36 +0100
To: pfps@research.bell-labs.com
Cc: "Jos De_Roo" <jos.deroo@agfa.com>, www-webont-wg@w3.org, www-webont-wg-request@w3.org
Message-ID: <OF9C6E601A.54A290EF-ONC1256CC8.005419D9-C1256CC8.00545058@agfa.be>


[...]

> > but then that would mean that to have a non empty individual
> > all appropriate annotations have to in the KB, right?
>
> It means that to satisfy
>
> Individual(annotation(x y)  annotation(x z) type(Person))
>
> there has to be annotation triples of the form <a,I(x),I(y)><a,I(x),I(y)>
> and <a,I(x),I(z)> for some a.

Maybe I'm confused...
Suppose the naming authority of na: creates an ontology in
which there is a individual na:x that has 2 annotation triples.
Suppose we are now given a graph with the triple na:x :y :z.
but not the annotation triples.
Would that graph entail na:x :y :z ?


> > > > On the other hand, the so called annotation "triples"
> > > > (NOT to confuse with RDF triples) are so
> > > > weak that no entailement other than belonging to A
> > > > can be done with them (seems to me).
> > >
> > > Well, this was the entire idea.
> >
> > Assuming that is the idea, then when such
> > triples are exchanged in RDF/XML how can
> > we ever know that they are special?
>
> You wouldn't have to.

I don't understand that.
Suppose we have an annotation triple :x :y :z
and we know that :y is a subproperty of :v
would that entail :x :v :z ?


> > I also guess that sameAs would apply to
> > their URIreference/dataLiteral arguments.
>
> The elements of the triples are elements of the domain of discourse, and
> the arguments of the ontology constructs are run through the denotation
> function, so
>
>          Individual(john annotation(hi john))
>          Individual(jack)
>          SameIndividual(john jack)
>
> would entail
>
>          Individual(john annotation(hi jack))

That I understand.

[...]

-- ,
Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/
Received on Sunday, 9 February 2003 10:21:14 GMT

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