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Re: ISSUE-88 (string subclass text): rdf:text document redefines xs:string as a subclass of rdf:text

From: Axel Polleres <axel.polleres@deri.org>
Date: Mon, 12 Jan 2009 15:05:53 +0100
Message-ID: <496B4E41.4030301@deri.org>
To: Jos de Bruijn <debruijn@inf.unibz.it>
CC: Rule Interchange Format Working Group WG <public-rif-wg@w3.org>

Jos de Bruijn wrote:
> 
> Rule Interchange Format Working Group Issue Tracker wrote:
>> ISSUE-88 (string subclass text): rdf:text document redefines xs:string as a subclass of rdf:text
> 
> This is not entirely true.
> Section 3.1 of [1] states that "specifications that use rdf:text MAY
> choose to interpret the [string] datatypes ... 

yes, the intention of the wording was to leave this to the 
implementation, although I see that this might need more discussion.

> in a slightly different
> way".  So far, OWL 2 has opted to do so; RIF has not.

yes.

> This is a source
> of incompatibility that we have not really discussed so far, but we
> should discuss it together with the other sources of incompatibility
> (e.g., integer versus float) at the face-to-face.
> 
>> http://www.w3.org/2005/rules/wg/track/issues/88

fine with me.

>> Raised by: Christopher Welty
>> On product: 
>>
>> The xs:string datatype is a datatype defined in XML Schema Datatypes [XML Schema Datatypes] as having the value space equal to the set of all strings. Thus, the value space of xs:string is not a subset of the value space of rdf:text, which may cause problems for certain applications of this specification. A similar problem arises with XML Schema datatypes that are derived from xs:string. 
>>
>>
>>
> 


-- 
Dr. Axel Polleres
Digital Enterprise Research Institute, National University of Ireland, 
Galway
email: axel.polleres@deri.org  url: http://www.polleres.net/
Received on Monday, 12 January 2009 14:06:37 GMT

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