RDF identifier qualifier

[ChristineHaugen-aut]

cimxml specification is allowing for the following RDF qualifiers:
Version 1: Underscore qualifier (default)

• rdf:ID="_"
• rdf:about="_"
• rdf:resource="#_"

Version 2: URN qualifier

• rdf:about="urn:uuid:"
• rdf:resource="urn:uuid:"

Version 3: namespace qualifier

• rdf:about=":"
• rdf:resource=":"

CIMXMLSerializer should use the Underscore as the default (rdf;ID shall only be used in a defined subset of profiles). If should be possible to use "urn" and "namespace" as settings. Det forventes at namespaces ligger i settings eller tilsvarende.

Trig and JSON-LD serialisation shall only support URN and namespace qualifier with URN as default. The use of namespace setting can apply to all the serialisation.