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". -RIF WG -- Dr. Christopher A. Welty IBM Watson Research Center +1.914.784.7055 19 Skyline Dr. cawelty@gmail.com Hawthorne, NY 10532 http://www.research.ibm.com/people/w/weltyReceived on Friday, 23 January 2009 21:13:58 GMT
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