W3C home > Mailing lists > Public > w3c-rdfcore-wg@w3.org > September 2003

RE: Action needed: subClassOf on datatypes

From: <Patrick.Stickler@nokia.com>
Date: Thu, 4 Sep 2003 10:42:01 +0300
Message-ID: <A03E60B17132A84F9B4BB5EEDE57957B5FBC61@trebe006.europe.nokia.com>
To: <phayes@ihmc.us>, <Jan.Grant@bristol.ac.uk>, <jjc@hpl.hp.com>
Cc: <w3c-rdfcore-wg@w3.org>, <Patrick.Stickler@nokia.com>


> "In addition, if it is known that the value space of the datatype 
> denoted by ddd is a subset of that of the datatype denoted by eee, 
> then it would be appropriate to assert that
> ddd rdfs:subClassOf eee .
> but this needs to be asserted explicitly; it does not follow from the 
> subset relationship alone."

I am favoring option (c). 

I'm also not opposed to Jeremy's (c++).

> In rule terms, do y'all think that rdfD4 *ought* 
> to be a valid rule (ie to be undeniably true under all 
> circumstances), or would it be better to allow people to make, but 
> also be free to not make, subClassOf assertions about 'external' 
> datatypes?

I think we should allow/require folks to make such assertions
explicitly, if they want such entailments to hold.

Received on Thursday, 4 September 2003 03:46:56 UTC

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