[Nml-wg] Review of RDF

[Freek Dijkstra]

And while I'm at it, here's one for Roman:

Are the .rnc file still in use? If not, I suggest to remove them from
the repository (those interested can still find them in the history).

If they are used, I noticed two incorrect URIs:
in nmlbase.rnc: "http://schemas.ogf.org/nml/2012/10/nml"
This should be "http://schemas.ogf.org/nml/2012/10/base#" (or without hash?)

In nmltypes.rnc: ""http://schemas.ogf.org/nml/2012/10/isSource""
This should be ""http://schemas.ogf.org/nml/2012/10/base#isSource"

Regards,
Freek