W3C home > Mailing lists > Public > w3c-rdfcore-wg@w3.org > July 2001

Re: rdfms-graph: Food for thought

From: Graham Klyne <Graham.Klyne@baltimore.com>
Date: Mon, 16 Jul 2001 13:10:34 +0100
Message-Id: <5.0.2.1.2.20010716130902.035b9630@joy.songbird.com>
To: jos.deroo.jd@belgium.agfa.com
Cc: me@aaronsw.com, w3c-rdfcore-wg@w3.org
At 11:40 AM 7/13/01 +0100, jos.deroo.jd@belgium.agfa.com wrote:


> > > 3) Can a node exist in a graph without any properties?
> > >
> > > Yes. This is indicated in the current XML syntax with an empty 
> Description
> > > element.
> >
> > Here, I disagree:  there is no obvious way to represent an isolated node in
> > an abstract syntax/model based on triples.  I think an empty <Description>
> > adds nothing to the semantics so should not appear in the abstract
> > syntax/model.
>
>I think there can be graphs with only 1 node e.g.
>   :paris :path :paris.
>Wether we should have "null" properties is not clear to me
>(although we use them inside our implementations)

I have no objection to a graph with one node;  it's the node without a 
property I'm less comfortable about.  See separate message for more detail.

#g


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Graham Klyne                    Baltimore Technologies
Strategic Research              Content Security Group
<Graham.Klyne@Baltimore.com>    <http://www.mimesweeper.com>
                                 <http://www.baltimore.com>
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Received on Monday, 16 July 2001 10:51:44 EDT

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