[Zope] Question: Files and history

[Daniel Talas]

I know this has been asked before, but I need a definite answer before
we can pick ZOPE as our platform of choice for a project.

One of the major requirements is to be able to view history for files
(docs, images, etc), and be able to view the actual file @ any point
in the history.  Basically, we need "history" functionality that ZOPE currently
provides for such objects as Scripts, DTML Methods, etc.

The question is, has it been done before?  Is there a ZOPE product
that has this functionality.  Would it be difficult to extend an
existing class to add this functionality?  I tried to follow one of
the suggestions in this mailing list (extending the class from
History.Historical), but that rendered my product invalid.

Any help would be appreciated!

Regards,
Daniel.