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Re: Issue rdfms-boolean-valued-properties

From: Dan Connolly <connolly@w3.org>
Date: Wed, 14 Nov 2001 13:18:15 -0600
Message-ID: <3BF2C377.5E93EBEA@w3.org>
To: Brian McBride <bwm@hplb.hpl.hp.com>
CC: rdf core <w3c-rdfcore-wg@w3.org>
Brian McBride wrote:
> 
> Issue
> 
>    http://www.w3.org/2000/03/rdf-tracking/#rdfms-boolean-valued-properties
> 
> requests a standard way to represent boolean valued properties and suggests the
> definition of rdf:is and rdf:isNot properties to meet this need.

another way to look at boolean-valued properties is
ala one-place-predicates.

I recommend representing HappyPerson(Fred) as
	ex:Fred rdf:type ex:HappyPerson.

i.e. for rdf:is, we have rdf:type

for rdf:isNot, we sort-of/will have rdf:type along with ont:complementOf

so...
	ex:Bob rdf:type [ ont:complementOf ex:HappyPerson].

DebM in the WebOnt WG is maintaing a tips/tricks document;
perhaps this idiom could go there, if not in our primer.


 http://www.ksl.stanford.edu/people/dlm/daml/modelingIssues.html
 <- http://www.daml.org/listarchive/joint-committee/0881.html


> Propose that as schema data types define a boolean data value, this issue be
> merged with:
> 
>    http://www.w3.org/2000/03/rdf-tracking/#rdfs-xml-schema-datatypes
> 
> Brian

-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
Received on Wednesday, 14 November 2001 14:20:35 EST

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