The intent of the "Specification Required" requirement for registration is
that sufficient public information be available to allow an interoperable
implementation. Specifically, the text says:

https://tools.ietf.org/html/rfc8126#section-4.6

   For the Specification Required policy, review and approval by a
   designated expert (see Section 5) is required, and the values and
   their meanings must be documented in a permanent and readily
   available public specification, in sufficient detail so that
   interoperability between independent implementations is possible.
   This policy is the same as Expert Review, with the additional
   requirement of a formal public specification.  In addition to the
   normal review of such a request, the designated expert will review
   the public specification and evaluate whether it is sufficiently
   stable and permanent, and sufficiently clear and technically sound to
   allow interoperable implementations.

I don't think that a for-pay specification meets that threshold, though I'm
not aware of any IETF-wide policy on that (although I may just have missed
it).

In the absence of that, it would as stated above, be on the Expert to
determine
the standard.

-Ekr





On Sun, Aug 18, 2019 at 2:52 PM Salz, Rich <[email protected]> wrote:

>
>
> Ø  This is one example: https://www.rfc-editor.org/rfc/rfc8428.txt
>
>
>
> Thank you.
>
>
>
> That is a bit different since RNC isn’t needed to implement the RFC, and a 
> web search for “relaxng” finds thousands of references.  The SM2, etc., 
> situation is different because you cannot implement the cipher without the 
> definition of it.
>
>
>
> _______________________________________________
> TLS mailing list
> [email protected]
> https://www.ietf.org/mailman/listinfo/tls
>
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