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Re: 2003-09-05 Semantics bug? "All classes are subclasses of themselves."

From: Dan Brickley <danbri@w3.org>
Date: Mon, 8 Sep 2003 16:14:12 -0400
To: pat hayes <phayes@ihmc.us>
Cc: w3c-rdfcore-wg@w3.org
Message-ID: <20030908201412.GN17159@w3.org>

* pat hayes <phayes@ihmc.us> [2003-09-08 10:15-0700]
> >http://www.w3.org/TR/rdf-mt/#technote (informative) states,
> >
> >...ends with:
> > "Notice that the question of whether or not a class contains itself as
> > a member is quite different from the question of whether or not it is a
> > subclass of itself. All classes are subclasses of themselves."
> >
> >Isn't this last observation a remnant of the old iff/extension version
> >of rdfs:subClassOf ?
> 
> Good catch, but we have imposed reflexivitiy of subClassOf, so its still 
> true.

And there was me feeling all clever for a second ;)

Can you explain briefly why subClassOf is reflexive now? (just curious,
and to leave a papertrail... (apologies if it's in the spec someplace I
missed)).

cheers,

Dan
Received on Monday, 8 September 2003 16:14:12 EDT

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