rdfs:isDefinedBy and version IRI

Hello,

When writing OWL ontologies in RDF syntaxes it is generally a good practice to explicitly relate the defined terms (i.e. classes, properties and individuals) back to the ontology through the property "rdfs:isDefinedBy". In OWL 2 with the introduction of owl:versionIRI there are two options now:

- Relate the terms to the ontology IRI
- Relate the terms to the version IRI

I wonder if the working group wishes to state any preference or give advice on which option to choose?

Regards,
  Simon