Regrets:
As per today's discussion, here's a proposal instead of creating a new Experimental status. All new attribute proposals for SEB-managed schemas would go through the following process:
(1) Proposers create draft (possibly in the form of a pull request).
(2) SEB performs quick sanity check for relevancy/interest.
(3) OID assigned by SEB to each new attribute.
(4) Draft reviewed by community (open comment period).
(5) Proposers present a relevant Proof of Concept using the new attribute(s), and incorporating any community feedback resulting in changes to proposal.
(6) SEB performs final review/approval.
(7) Draft merged to next version of the appropriate schema.