Declaration( Datatype( DT ) )

Hi!

Again one of these overly late comments. :)

According to Section 5.8 of the Structural Spec [1], it is possible to declare datatypes:

  Declaration( Datatype( DT ) )

I can also see a mapping to RDF for this construct in Table 1 of the RDF Mapping [2], and a reverse mapping in Table 7 [3]. 

I do not understand why this is supported in OWL 2 DL. We do not allow for things like giving names to datatype restrictions, right? Or do I miss something?

Best,
Michael

[1] <http://www.w3.org/2007/OWL/wiki/Specification#Entity_Declarations_and_Typing>
[2] <http://www.w3.org/2007/OWL/wiki/Mapping_to_RDF_Graphs#Translation_of_Axioms_without_Annotations>
[3] <http://www.w3.org/2007/OWL/wiki/Mapping_to_RDF_Graphs#Parsing_of_the_Ontology_Header_and_Declarations>

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Dipl.-Inform. Michael Schneider
Research Scientist, Dept. Information Process Engineering (IPE)
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