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Re: rdfs:subClassOf and XSD derivation by restriction

From: Peter F. Patel-Schneider <pfpschneider@gmail.com>
Date: Tue, 6 Mar 2018 14:28:25 -0700
To: Richard Smith <richard@ex-parrot.com>, Andreas Harth <andreas@harth.org>
Cc: semantic-web@w3.org
Message-ID: <ab7a1821-3837-b461-3ba4-ebd846d329e3@gmail.com>

On 3/6/18 9:43 AM, Richard Smith wrote:
> Andreas Harth wrote:
>> The RDF 1.1 semantics spec gives that example and implicitely derives 
>> that entailment from the XSD specification (I think).
> Having thought about this in some more detail, I think I now 
> understand it.
> So far as I can tell, none of the RDF specs formally defines the 
> lexical-to-value mapping of the RDF-compatible XSD types.  I'd expect 
> it to be defined in §5.1 of RDF 1.1 Concepts but it is not said 
> explictly.  Nevertheless, I'm sure it's intended that the lexical 
> space, value space and lexical-to-value mapping of these types for the 
> purpose of RDF is the same as their lexical space, value space and 
> lexical mapping as defined in XSD. 

Yes, I would say that this is the intended meaning of "IRIs 
<https://www.w3.org/TR/rdf11-concepts/#dfn-iri> of the form 
|http://www.w3.org/2001/XMLSchema#/xxx/|, where |/xxx/| is the name of a 
datatype, denote the built-in datatypes defined in /XML Schema 1.1 Part 
2: Datatypes" <http://www.w3.org/TR/xmlschema11-2/>/in 5.1 of RDF 1.1 
Concepts.//  It probably would have been better to make this blindingly 
obvious, however.

> Richard

Received on Tuesday, 6 March 2018 21:28:56 UTC

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