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Re: Acyclic RDF Graph???

From: Dan Brickley <danbri@w3.org>
Date: Thu, 23 Mar 2000 11:22:55 -0500 (EST)
To: Gerard Maas <gerard.maas@alcatel.be>
cc: RDF-list <www-rdf-interest@w3.org>
Message-ID: <Pine.LNX.4.20.0003231121050.9690-100000@tux.w3.org>

That was an unfortunate typo :-(

(I don't know if the W3C version of that paper can be amended - will check)

Dan

On Thu, 23 Mar 2000, Gerard Maas wrote:

> Dan,
> 
> In a document were you co-author:"A Query and Inference Service for RDF" 
> is said:
> (In the introduction)
> 
> RDF provides a framework for representing machine-processable data on the
> Web. The RDF Model & Syntax specification [1] defines a formal
> set-theoretic data model which can have several isomorphic
> representations:
>  *  3-tuples (triples)
>  *  acyclic directed labeled graph
>  *  XML transfer encoding
> I am writing some access code to a RDF Object model (not so ambicious as
> to be said "RDF API), and cycles increase the complexity. On top of that,
> until now, I haven't found any example of RDF Data with a cycle inside.
> Of course I can make one, but it seems not to be used.
> 
> Thanks for your reaction,
> 
> Gerard.
>  
> 
> Dan Brickley wrote:
>       Cycles are fine, even encouraged. The specialisation
>       properties
>       (subClassOf, subPropertyOf) aren't supposed to loop, but
>       that's all
>       the spec says w.r.t. restricting cycles. --dan
> 
> 
> 
Received on Thursday, 23 March 2000 11:23:58 GMT

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