[Zope-PAS] Re: proposal: IUserAdder plugins

[Jens Vagelpohl]

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On 6 May 2007, at 05:12, Miles wrote:
>> -1, we can not change semantics of existing interfaces.
>>
>
> I agree with this.  Though the restriction is not documented  
> anywhere: I
> am happy to add some explanatory notes though.

It does not need to be documented because that is a generally  
accepted rune, not something specific to this project. Interfaces  
should not change out of the blue. If a change must be made there are  
mechanisms (deprecation warnings, etc) that can be used to tell  
people about impending changes, and they're usually employed for 2  
releases.

jens

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