[ietf-types] Q's regarding development of +json media types

[Nathan <[e-mail]>]

Hi,

I'm currently working on / experimenting with two JSON based 
media-types, the first is a JSON based serialization of Notation 3, the 
other a JSON based serialization of N-Triples.

I've got to the point now where I have implementations of both and need 
to content-negotiate over them, thus my initial question is what media 
type should I use in the interim whilst experimenting?

For a later date, if I were to move towards seeking registration, would 
the best approach be to work on the specifications out with any 
standards body, or to do the work as an internet-draft, or?

Would the recommended approach be to work towards a json-schema approach 
or towards a "+json" type?

And finally, for JSON based media-types do you have any special 
considerations or gotcha's I should be taking in to account at an early 
stage?

Best & TIA for any response,

Nathan