On 5 Jul 2026, at 10:15, Richard Clayton wrote:

The text was meant to put across to implementers "don't add unnecessary Message-Instance fields it just wastes time and energy"... but it isn't
an interop issue so MUST NOT was rejected in favour of SHOULD NOT and
the MUST in #9.1.3 probably needs rephrasing.

I'd point out that 2119 says that if it's not an interoperability issue, SHOULD NOT is also inappropriate. I would re-word to something along the lines of of your first sentence: "It is unnecessary to do this and just wastes time and energy."

pr
--
Pete Resnick https://www.episteme.net/
All connections to the world are tenuous at best

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