[Zope] New versions of a product

[Robert Leftwich]

What is the best strategy to use when upgrading to a new version of a Zope 
Product that is already in production and has significant amounts of data 
in it?

The issues are :

1. Modified hierarchy of objects
2. New classes/objects - not a problem as they don't exist in the earlier 
version.
3. Deleted classes/objects (i.e. no longer required)
4. Renamed classes/objects
5. New methods/attributes -  not a problem as they don't exist in the 
earlier version.
6. Deleted methods/attributes  (i.e. no longer required)
7. Renamed methods/attributes

Robert Leftwich