[Zope-ZEO] Does the ZODB support ACID?

[Ender]

More followup,

> And finally, I don't really see how the ZODB supports Consistency,
> since there's no mechanism for specifying integrity constraints within
> ZODB itself, though you can certainly write such checks into your
> classes.  For example, you can't enforce that the .actor attribute is
> a User object that must be present in a given list.

you could also install a transaction manager that would enforce
consistency checks on objects within a transaction and abort a
transaction in tpc_vote. to me it seems that enforcing these types of
consistency checks would require a registry of classes and their
required attrs. 

kapil