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Re: How/Why to implement Reification efficiently...

From: Stefan Kokkelink <skokkeli@mathematik.uni-osnabrueck.de>
Date: Fri, 01 Dec 2000 13:06:46 +0100
Message-ID: <3A279456.BF0F65C@mathematik.uni-osnabrueck.de>
To: Seth Russell <seth@robustai.net>
CC: Ora Lassila <daml@lassila.org>, www-rdf-interest@w3.org
Seth Russell wrote:
> 
> Ora Lassila wrote:
> 
> > Although the RDF M+S "allows" this, it is in fact illegal to write an
> > "aboutEach" construct anywhere except on the top level inside the
> > rdf:RDF element. Parsers should report an error.
> >
> > So you may ask, "why is this illegal". Here's my explanation: the said
> > "aboutEach" construct does not result in a single node as its "value"
> > (when "evaluated"), and hence causes problems when the parser attempts
> > to build a graph.
> 
> Well I don't know about parsers, but I didn't have any problems building a
> mentograph of this :))
> 
> http://robustai.net/mentography/abouteach.html

My parser [1] doesn't have a problem with this, too.
Try "E8" and enable "Visualize with GraphViz".

But as Ora said, this shall be deemed to be wrong. 
If there is no complain, I will fix it in the
next release.

Stefan

[1] http://zoe.mathematik.Uni-Osnabrueck.DE/RDF/parser.html
Received on Friday, 1 December 2000 07:07:39 GMT

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