[Zope3-dev] RFC: Reducing the amount of ZCML directives

Martijn Faassen faassen at infrae.com
Mon Feb 13 12:40:48 EST 2006

Lennart Regebro wrote:
> On 2/13/06, Philipp von Weitershausen <philipp at weitershausen.de> wrote:
>>Hi all,
>>looking for your comments at
>>http://dev.zope.org/Zope3/ReducingTheAmountOfZCMLDirectives :)
>>This is a "formal" follow-up on my blog post on ZCML a while back
>>I expect there will be more proposals in this direction, this is just the
>>beginning. It is also the easy part.
> Uhm. -1, actually. I think getting things out of ZCML is a good idea,
> but I think this shoots slightly beside the goal. This proposal aims
> mostly at getting rid of statements that can be done with other
> statetements, but using more lines. I think that goal is misguided, as
> it would require you to make longet ZCML files with more basic
> statements. This in  turns means you need to understand more of what
> you are actually doing. Remember that many of these statements were
> introduced because ZCML was too obscure and you needed to understand a
> lot of different interfaces do know between which interfaces to adapt
> for example.

I would like to highlight Lennart's point. We need to be very careful 
here. We would only have an illusion of improvement if we'd end up with 
less directives but more long dotted names into Python packages. I'd 
argue that this might make ZCML *harder* to understand, not easier.

In fact, I wonder what a ZCML would look like that focused on reducing 
the amount of dotted names in use...



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