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Re: Comment on Last Call Working Draft of RDF Semantics document concerning XML Schema datatypes

From: pat hayes <phayes@ai.uwf.edu>
Date: Sun, 26 Jan 2003 16:07:55 -0700
Message-Id: <p05111b1dba59f03eb244@[10.0.100.247]>
To: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>
Cc: www-rdf-comments@w3.org, w3c-rdfcore-wg@w3.org

>Some XML Schema primitive datatypes are impossible to use as RDF
>datatypes.  Therefore XSD intepretations are ill-defined.
>
>The problematic datatypes include:
>duration - because equality in its value space is not well defined
>QName - because there is no fixed lexical-to-value mapping
>ENTITY - because there is no fixed value space
>NOTATION - because there is no fixed lexical space

I would say that these cases are not impossible to use, but rather 
that certain entailments involving them are not well-defined. Section 
4.3 of the semantics document explains which entailments require 
which kinds of information about a datatype. In the cases where such 
information is unobtainable or undefined, the corresponding 
entailments will not be supported.

Pat




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Received on Sunday, 26 January 2003 18:22:15 GMT

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