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RE: Model Digest Algorithm

From: Graham Klyne <GK@Dial.pipex.com>
Date: Tue, 02 May 2000 17:20:52 +0100
Message-Id: <>
To: "McBride, Brian" <bwm@hplb.hpl.hp.com>
Cc: "RDF Interest (E-mail)" <www-rdf-interest@w3.org>
At 02:25 PM 5/2/00 +0100, McBride, Brian wrote:
> >As Brian has already demonstrated, the XOR aggregator is not
> >sufficient
> >even for case (a).  The immediately evident problem here is
> >that (X XOR Y
> >XOR Y) == X, for all Y.  So how about using simple addition,
> >modulo 2^n, as
> >an aggregator?
> >
>There is a small subtlety here.  An RDF model is a set of statements.
>Sets have no duplicates, so no statement can appear twice.
>Cancellation is therefore less of a risk.

It was my understanding that while there could be no duplicate resource 
names, there could be duplicate instances of a given property between the 
same subject/object pair.

I think it would certainly be possible to describe this using multiple 
reified statements with different statement resource IDs.


Graham Klyne
Received on Tuesday, 2 May 2000 13:32:45 UTC

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