Re: Class warfare: rdfs: vs. daml:

From: Ian Horrocks (
Date: 11/06/01

On November 5, Pat Hayes writes:
> I noticed on rdf-logic recently some remarks concerning the fact that 
> DAML-S uses rdfs:Class and rdfs:Property rather than the 
> daml:-prefixed versions, and how this is both troublesome, and going 
> to be corrected in future versions of DAML-S.
> However, I would like to suggest a rather more radical solution, 
> which is that we should simply declare that (in DAML+OIL), daml:Class 
> and daml:Property are equivalent to  rdfs:Class and rdfs:Property, so 
> that a conforming engine is required to treat them synonymously. As 
> far as I can see, there is no model-theoretic reason not do this, and 
> since the pragmatic benefits of a tighter integration seem obvious, 
> why do we maintain this rather snooty stance of insisting that *our* 
> classes are somehow different from *their* classes ? Of course, you 
> can say more about them in DAML+OIL than you can in RDFS, but they 
> are still the same *things*. As Robert Burns might have said: a set's 
> a set, for a'that.

Didn't we just decide that daml:Class isn't the same as rdfs:Class
because a daml:Class cannot have a literal in its extension?


> Pat Hayes
> -- 
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