W3C home > Mailing lists > Public > www-rdf-logic@w3.org > June 2001

Re: properties with classes as values?

From: Sean B. Palmer <sean@mysterylights.com>
Date: Thu, 7 Jun 2001 19:00:54 +0100
Message-ID: <009101c0ef7b$e74ef060$2aed93c3@z5n9x1>
To: "David Martin" <martin@ai.sri.com>
Cc: <www-rdf-logic@w3.org>
> >    :myProperty rdfs:range rdfs:Class .
> First (minor point) - any reason why I can't use daml:Class
> as my range?

None whatsoever.

> First, can a Class have a range?  Or did you mean to declare
> property x, rather than class x?

Oops, yes. Apologies for that error.

I have seen people trying to declare range and domain semantics for
"all instances of a certain subClassOf rdf:Property" though. In fact,
DAML does something like that, as I recall.

> which is to declare the range of a property (called
> myProperty) to be the set of subclasses of #Animal.

Ah, the *set* of subClasses, not a particular set. Well, thanks to
DanC coming up with a neat little vocabulary for that and given it a
date-stamped W3C URI, I guess the case is closed :-)

Kindest Regards,
Sean B. Palmer
@prefix : <http://webns.net/roughterms/> .
:Sean :hasHomepage <http://purl.org/net/sbp/> .
Received on Thursday, 7 June 2001 14:00:18 UTC

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