Chris and Joachim -
Maybe this is too simplistic of an approach ... but why not have the session data manager automatically create a new, session data container (temporary storage) for a given zope version. The session data manager can be optimized for the case of no version and then when and if needed create temporary storages on demand for a particular version. - j _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )