Jim Fulton wrote at 2004-7-15 10:00 -0400:

... Given this, I'd like to formally announce the intention to deprecate versions in both Zope and ZODB. We will formally deprecate versions when we have a way to maintain long-running transactions in Zope. I have a good idea how they would work and I'd be happy to advise volunteers on how to proceed. Any volunteers? Any objections?

Versions are nothing else than long running transactions (which the additional but not essential feature to be able to join such a transaction). Locking might be necessary for long running transactions as the longer the transaction the higher becomes the risk of conflicts and the more costly a redo of the transaction. When we get long running transactions I will be happy to let Versions alone. -- Dieter