Issue-118 wording for Concepts, revized

After Ivan's email and in the fresh light of morning, suggested revised wording for Concepts, avoiding the smell of Semantics:

In Concepts:

1.3  The Referent of an IRI

The resource denoted by an IRI is also called its referent. For some IRIs with particular meanings, such as those identifying XSD datatypes, the referent is fixed by this specification. For all other IRIs, what exactly is denoted by any given IRI is not defined by this specification. Other specifications may fix IRI referents, or apply other constraints on what may be the referent of any IRI. 

5.4 Datatype IRIs

Datatypes are identified by IRIs. If D is a set of IRIs which are used to refer to datatypes, then the elements of D are called <em>recognized</em> datatype IRIs. Recognized IRIs are considered to be rigid identifiers [[link to definition in Semantics]]. Recognized IRIs have fixed referents, which [[must]] satisfy these conditions:

If the IRI http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral is recognized then it refers to the datatype rdf:XMLLiteral ;
If the IRI http://www.w3.org/1999/02/22-rdf-syntax-ns#HTM ) is recognized then it refers to the datatype rdf:HTML ;
If any IRI of the form  http://www.w3.org/2001/XMLSchema#xxx ) is recognized then it refers to the RDF-compatible XSD type named xsd:xxx, for every XSD type listed in section 5.1

Semantic extensions of RDF [[may]] recognize other datatype IRIs and require them to refer to a fixed datatype. 

RDF processors are not required to recognize datatype IRIs. Any literal typed with an unrecognized IRI is treated just like an unknown IRI, i.e. as referring to an unknown thing. Applications [[may]] give a warning message if they are unable to determine the referent of an IRI used in a typed literal, but they [[should not]] reject such RDF as either a syntactic or semantic error. 


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Received on Wednesday, 1 May 2013 14:56:46 UTC