[Mailman-Developers] Sibling list terminology (was Re: Mailman 2.1.10b4 Released)

[Barry Warsaw]

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On Mar 27, 2008, at 4:09 PM, Mark Sapiro wrote:

> The actual word "sibling" appears in a few places. It is in the  
> title of
> the subsection for configuring regular_(in|ex)clude_lists, and is
> mentioned in the detailed help for these settings in the phrase "site
> administrator may prohibit cross domain siblings". It is also in the
> configuration variable ALLOW_CROSS_DOMAIN_SIBLING.
>
> I would be reluctant to change this for 2.1.10 because the existing
> strings have been translated in a few updates, and I have been  
> actively
> trying to keep from making any further changes to i18n strings.
>
> As far as whether the 'sibling' relationship is symmetric or
> antisymmetric, this is a question that can only be answered if the
> definition of the relationship is precise enough. There are at least  
> two
> possible definitions that make sense to me.
>
> 1) List A is a sibling of list B iff list A appears in one of list B's
> regular_(in|ex)clude_lists attributes.
>
> 2) List A is a sibling of List B iff list A appears in one of list B's
> regular_(in|ex)clude_lists attributes or list B appears in one of list
> A's regular_(in|ex)clude_lists attributes.
>
> Under definition 1), the 'sibling' relationship is neither symmetric  
> nor
> antisymmetric. Under definition 2), the 'sibling' relationship is
> symmetric and not antisymmetric.

I agree that it's too late to change this in 2.1.10, which probably  
means it's too late to change for 2.1.  I think you're follow up  
rationale indicates that "sibling" is probably an acceptable term for  
the feature given one way of looking at it, and because we have  
nothing better. ;)

> As far as a list being in it's own regular_(in|ex)clude_lists, as a
> result of Ian's original post, I changed the GUI to not allow it and
> changed the handler to ignore it, but log it.

Great, thanks!
- -Barry

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