W3C home > Mailing lists > Public > public-owl-comments@w3.org > January 2009

non-disjoint value spaces for numeric datatypes

From: Chris Welty <cawelty@gmail.com>
Date: Fri, 23 Jan 2009 16:13:13 -0500
Message-ID: <497A32E9.5070607@gmail.com>
To: public-owl-comments@w3.org

The RIF WG's primary mission is interchange, and interoperability between RIF 
and OWL is both an internal goal as well as, we believe, a goal of the semantic 
web community in general.  We believe that the semantic web standards should 
settle on a common interpretation of XML Schema datatypes.

We have reviewed the OWL definitions for the XML schema datatypes and have found 
them acceptable for RIF with one exception:  we cannot work with the 
redefinition of xsd numeric datatypes with overlapping (non-disjoint) value 
spaces.  While we all agreed the idea of e.g. "1.0"^^xsd:double and 
"1"^^xsd:decimal being the same entity makes sense, RIF adds a set of builtin 
functions and predicates to its chosen xsd's and these are based on a wide 
implementation base that assume disjointness of xsd value spaces.  Breaking 
these implementations would negatively impact interchange and significantly 
raise the "barrier to entry".


Dr. Christopher A. Welty                    IBM Watson Research Center
+1.914.784.7055                             19 Skyline Dr.
cawelty@gmail.com                           Hawthorne, NY 10532
Received on Friday, 23 January 2009 21:13:58 UTC

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