Got it. This is very good feedback.

Many thanks.

-andy

On 12/12/25 3:58 AM, Pawel Kowalik wrote:
> Hi Andy,
> 
> On 11.12.25 22:02, Andy Newton wrote:
>> Just to be clear, are you suggesting evolving an extension without an 
>> evolution signal should be allowed? In other words, not MUST NOT and not NOT 
>> RECOMMENDED?
> 
> Yes, not MUST NOT and not NOT RECOMMENDED.
> 
> But RECOMMEND using versioning extension and MUST assure clients do not 
> break, whatever it means if not yet enough specified in STD 95.
> 
>> My opinion (and just my opinion), we could do NOT RECOMMENDED by saying it 
>> should only be done in circumstances where there is not enough time to use 
>> other methods or where the impacted clients will be known to be updated. In 
>> other words, I am trying to find a scenario where this is the only 
>> reasonable approach.
> 
> I don't think the bar shall be set that high to say you must do it unless not 
> technically feasible.
> 
> My point is that there should not be hard dependency put on the extension to 
> say, that the client MUST also implement and understand versioning extension. 
> Versioning shall be an additional useful signalling, but not a prerequisite 
> to assure clients won't break.
> 
> Kind Regards,
> Pawel
> 
> 

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