[Zope3-dev] new advanced package

[Martijn Faassen]

Hi everybody,

Most of you have seen the checkin comments by now, so I thought I'd give 
a rundown on zope.app.advanced, which adds adapters and a UI for 
advanced compatibility layer queries in Zope 3. The goal is improved 
Zope 2 backwards compatibility, but to do so we had to improve the XML 
support in the package. Especially superclass support turned to be tricky.

The package has been implemented by Philipp von Weitershausen and 
myself, with some code contributed by Sidnei da Silva. It's based on Jim 
and Steve's ideas here:

http://dev.zope.org/Zope3/AdvancedQueryMechanismsUsingXMLToIntegrateZope2BackwardCompatabilityIssues

It turned out that using the new binding selection algorithm we can 
simplify event subscription for this package. The management UI can 
therefore be a lot simpler than we first anticipated in the discussion 
with Jim and Steve. The wiki page is therefore a bit out of date but 
should still be easy to follow.

Besides the query-based backwards compatibility system, we've also added 
undo integration. This was really easy after Philipp's work on the undo 
model.

Check out the UI in Zope 3 by the way; we're especially pleased with it. 
  We hope we can start to use the same templating techniques in other 
areas in Zope 3 soon.

Regards,

Martijn