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Re: A triple is not unique.

From: <jos.deroo.jd@belgium.agfa.com>
Date: Tue, 21 Nov 2000 23:44:11 +0100
To: " - *melnik@db.stanford.edu" <melnik@db.stanford.edu>
Cc: " - *www-rdf-interest@w3.org" <www-rdf-interest@w3.org>, " - *Daniel.Brickley@bristol.ac.uk" <Daniel.Brickley@bristol.ac.uk>
Message-Id: <0006800035493304000002L042*@MHS>
Sergey wrote:
> That's my interpretation:

> - every statement has a unique ID generated using a Skolem function
>   reify(s, p, o).
> - the reification mechanism described in the specification (or any other
>   we come up with) is syntactic;
>   the parser will substitute the value of reify(s, p, o) for the
>   identifier used in the serialization.

> A triple is unique.

Wonderful, Sergey! (how are you doing?)
Let my try it also ...
We should proof that:
  Forall s,p,o Exists t: t is unique [F]
Skolem has found that we can eliminate exists and write:
  Forall s,p,o: f(s,p,o) is unique [Fs]
Formula Fs is not equivalent with formula F, but:
  F is provable <=> Fs is provable
Now, a function has a unique value for its arguments, so

This also shows the good news about implicit universal quantification
and the use of proof-value RESOURCE's for RDF based logic ...

Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/
Received on Tuesday, 21 November 2000 17:44:27 UTC

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