Re: rule proto-proposal

From: Peter F. Patel-Schneider (
Date: 05/30/01

From: Stefan Decker <>
Subject: Re: rule proto-proposal
Date: Tue, 29 May 2001 17:11:49 -0700

> Hi Pat,
> At 05:58 PM 5/29/2001 -0500, pat hayes wrote:
> >>Hi,
> >>
> >>some additions to Pats suggestion:
> >>
> >>1) In many applications it is important to distinguish between different 
> >>kind of RDF data, eg.
> >>     between different sources of RDF data, one is trustworthy, the other one
> >>   not.
> >
> >That seems to me to be an assertion about the source rather than the data 
> >(?) But in any case it goes well beyond the RDF or DAML semantics.
> If we built a rule language for processing of RDF data it is necessary to 
> distinguish
> different sets of RDF data. One example where it is important to 
> distinguish between
> different kind sets of RDF data is when it comes from different sources, 
> and that
> it originates from different sources is a property of the data.
> There are other applications areas, e.g. the computation of different 
> semantics (see my RDF Schema
> example).

I have grave doubts about this sort of extension to RDF without having any
notion of belief or knowledge, because this is what the ability to
distinguish between the sources of information boils down to.


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