Move datatypes definitions in RDF-Schema?

[pchampin]

RDF-Concepts is defining 3 datatypes: rdf:HTML, rdf:XMLLiteral and rdf:JSON.

Those datatypes are not, per-se, part of the data model / abstract syntax. I believe it would make sense to move their description in the RDF-Schema document, which over time, has turned into the human-readable documentation of the whole rdf: and rdfs: vocabularies.

In fact, there are already entries for rdf:HTML, rdf:XMLLiteral (very terse ones, though).