Hoefully this is not too ambiguous. But I'm wondering if there are any "gotcha's" in developing an application that would maintain parts of it's data in ZODB and the rest in an RDBMS? This might be better stated as a situation where one application that uses Zope and an RDBMS was a sub-part of a ZODB application. Say, a sales management app in ZODB uses an accounting app that stores its data in an RDBMS through the same Zope server? Thanks, -- Tim Cook -- FreePM Project Coordinator http://www.freepm.org OS Health Care Alliance Supporter http://www.oshca.org