[DID Data Object References] "naked DID" is not defined in the paper

Reference: https://github.com/WebOfTrustInfo/rwot8-barcelona/blob/master/topics-and-advance-readings/DID-Data-Object-References.md

@talltree @ken-ebert "naked DID" is a non-technical term that is not defined in the paper.

Is a "naked DID" simply a `did` as defined in the proposed ABNF grammar?  If so, then I suggest using the term `did` ...and avoid using/inventing a new, non-technical term.