As I understand the gist of the comments, the document in question was
driven by the observation that folks were having trobule achieving
interoperability. Trying to fix that is clearly sensible and very much
in the IETF and working group interest.
Have you looked at things like the SIP torture tests? Those are
codifications of specific messages to specific entities that tended to
break implementations. It is much easier to define those than actual
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