Proposed wording (was: Duplication of provisional URI namespace tokens in 2717/8-bis)

Following an offline exchange, I offer the following wording as a possible 
way to express the desire for uniqueness of names while keeping open the 
option of documenting duplicates:

[[
New submissions for the provisional registry MUST NOT use a scheme name that
is already present in the permanent registry, and SHOULD NOT use a name
that is already present in the provisional registry.
]]

I believe this approach is consistent with what were aiming to achieve with 
the message jheader field registry.

I haven't figured exactly where it might fit in the proposed registration 
draft.

#g


------------
Graham Klyne
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http://www.ninebynine.org/#Contact