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Re: subject=predicate ?

From: Nikita Ogievetsky <nogievet@cogx.com>
Date: Sun, 15 Jul 2001 12:47:33 -0400
To: "Ron Daniel" <rdaniel@interwoven.com>, "Sean B. Palmer" <sean@mysterylights.com>, <www-rdf-interest@w3.org>
Cc: <www-rdf-logic@w3.org>
Message-ID: <OE81Fjxe0ymQ1WE9ql2000006b0@hotmail.com>
Ron, Sean, thank you very much for your answers.

To give a more specific example of
what I actually meant:

<rdfs:Property rdf:ID="SameAsPerMyUnderstanding">
    <SameAsPerMyUnderstanding
rdf:resource="http://www.daml.org/2001/03/daml#sameClassAs"/>
</rdfs:Property>

I take your answers, that it is possible and legal
(indeed, nothing in the spec says that it is not)
and that RDF processors are not supposed to chock on this.

In fact, SiRPAC gave me these triples:

<online:SameAsPerMyUnderstanding>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.w3.org/2000/01/rdf-schema#Property> .
<online:SameAsPerMyUnderstanding> <online:SameAsPerMyUnderstanding>
<http://www.daml.org/2001/03/daml#sameClassAs> .

Please advice if there are any reservations whatsoever.

Thanks,

--Nikita.

----- Original Message -----
From: "Ron Daniel" <rdaniel@interwoven.com>
To: "Sean B. Palmer" <sean@mysterylights.com>; "Nikita Ogievetsky"
<nogievet@cogx.com>; <www-rdf-interest@w3.org>
Cc: <www-rdf-logic@w3.org>
Sent: Sunday, July 15, 2001 11:07 AM
Subject: RE: subject=predicate ?


> Sorry, sloppy terminology on my part. Sean is
> correct that I should have said Property.
>
> Ron
>
> > -----Original Message-----
> > From: Sean B. Palmer [mailto:sean@mysterylights.com]
> > Sent: Sunday, July 15, 2001 8:00 AM
> > To: Ron Daniel; Nikita Ogievetsky; www-rdf-interest@w3.org
> > Cc: www-rdf-logic@w3.org
> > Subject: Re: subject=predicate ?
> >
> >
> > > > is it valid from RDF standpoint (an why not?)
> > > > if subject and predicate are same?
> > >
> > > Nothing in the current M&S spec prevents this.
> > [...]
> >
> > A subject cannot be a *predicate* as I understand it, because the
> > predicate is always the piggy-in-the-middle as far as the triple is
> > concerned, but of course an instance of *property* (i.e. rdf:type(?x,
> > rdf:Property)) can be. I think that Nikita was in fact asking if a
> > property can be used as a subject. The answer, therefore, is "yes".
> >
> > --
> > Kindest Regards,
> > Sean B. Palmer
> > @prefix: <http://webns.net/roughterms/> .
> >:Sean :hasHomepage <http://purl.org/net/sbp/> .
>
>
>
Received on Sunday, 15 July 2001 12:51:53 GMT

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