I usually love gmail, but in these last discussions I have trouble to
understand, where I should write my reply to, since I can not see a
thread. So I write a reply to the first mail and reference to various
mails below. Sorry for that confusion to the people who use real mail

I would like to comment on this stuff with a bit of an outsider view.
Somewhere in 2005-2006 I got a bit disconnected from zope and its
I was stuck to, I think, 2.8, and lots of Zope2 specialities that
exist in Zope2 and not in Zope3.
I disliked the things that were in Zope2 but not in Zope3. I must
admit, that's a bit of fan boy attitude that I must get rid of. But in
the time 2005, 2006, Z3 was the new kid on the block, everybody was
wondering who would need how much time to migrate to the new zope.
Zope3 was the big rewrite that will be the standard soon.

Now I was told that Zope3 is not being seen as a replacement of Zope2.
That stuck me as odd. Philips book does not say, that Zope3 will
replace Zope2. But he suggests to try to use as much Zope3 technology
through five, to have an easy migration. That at least suggests that
Zope3 is the future while Zope2 is not.
When I go to www.zope.org and click on Zope 3 on the left, I reach a
wiki page that states that Zope 3 improves the development experience.
There is nowhere written that Zope3 replaces Zope2. But it also suggests it.
The English entry of the wikipedia states clearly that Zope3 is not
the successor, an older version even points to suggestions from Jim,
where is a discussion about the possible future:

I did not check wikipedia, nor did I skim the last three years of
mailing list traffic, I wonder, did I not do enough thoroughly
research in 2008?


I came back to Zope Land in October 2008. I became responsible for a
number of web apps that are based on Zope2, all programming logic in
Script Python, and all data in MySQL. Actually even security was
implemented on its own based on attributes in sql. I considered this
an outdated development model. But I am beginning to understand that
this is wrong, that's my damn fan boy attitude. Everybody said, Zope3 is
better so Zope2 models that were not taken over clearly must suck.

Funnily, I tend to gravitate to products that handle zope2 development
this way. 2005/2006 I was also doing stuff, there all I did was
considered customization and should be handled in script python. The
developers went big ways to make this better and better, they even
added svn support for the scripts! But I disliked it, fan boy that I
am, and was thinking: "Hah, when Zope3 comes along and Zope2 will be
outdated, they must rethink their strategy, then they see that this
has no future."

I disregarded the business decisions these companies made with the way
they did Zope development and considered it inferior. But these
companies have based their development model on this. They allow
customers who do customizations in code, and depend on Zope, to take
care that their customers cant break their system. This is their competitive
advantage that they cant afford to loose.

That is a different culture and mind than the ones who do typical
Zope3 development. For the Zope3 developer, the only ones who program
are the programmers and keeping the code in file system and
unrestricted is much much better because you have all the development
tools at hand to have higher productivity and safety. Think versioning
system and easy search and replace over multiple files.

With this in mind, Zope2 and Zope3 are totally different things.
People who use Zope2 and want to continue using it have different
goals than the Zope3 developers. I think, both have the right to have
their own communities. A different name would help separating these
communities. People who do both Zope2 and Zope3 stuff would just be in
two communities.


When I started big extensions in October 2008, I wanted to do it
future proof, Zope3ey. I knew of grok, thought of it as something on
top of Zope3 and repoze, that seemed to be something different
I wanted to do a smooth migration. As much as possible should be
written on top of the Zope3 part in Zope2, so that one day I would
just run it on Zope3 directly. I didn't want to use grok, because I
feared it would add another complication, and I wanted to do one new
thing at a time. It didn't work out exactly like that. Stumbling and
stumbling but finally succeeding I ended up reimplementing nearly
everything. My goal still was to get it all going on Zope3 one day,
but I stayed with Zope 2.10. Now after reading the threads, I start to
believe that this was the wrong way. I think now grok is not so much
on top of Zope3, and maybe I should have taken a deeper look into
that. But how shall somebody, who does not wade through the mailing
lists, make an informed decision? If the Zope3 App Server with its zmi
is becoming more of an implementation to show whats possible with the
ZTK, why should it be called Zope3?


People start to get annoyed of this discussion, since some started to
say bad words. I for one am happy about this discussion, because I
hope that It might result in a better common understanding and after
that a better public statement, whats happening, what frameworks are
around and which have what advantages and disadvantages.
Also, I want be be in the Zope foundation, so that Lennart makes me
drunk too. I heard he favors whisky. That's fine.

Best regards,

Zope-Dev maillist  -  Zope-Dev@zope.org
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