Hi Zope fans, Just to let everyone know, below is a copy of a message I sent to Phil Greenspun, about some errors in his document. Hopefully he won't get swamped with duplicates. Later, Jerry S. There are many examples of the Zope team leveraging pre-built tools, and two examples you mention to the contrary (below) are in fact erroneous. "For example, they built their own Web server (ZServer); we used AOLserver..." ZServer is Sam Rushing's "Medusa" http://www.nightmare.com/medusa/index.html "Zope built their own database management system; we used Oracle out of the box..." Zope uses Aaron Watters' "Gadfly" http://www.chordate.com/gadfly.html Also: "Compare http://www.arsdigita.com/pages/toolkit/modules.html to what you find at www.zope.org and you'll see the practical difference in terms of pre-built modules." Maybe you didn't notice: http://www.zope.org/Products Personally, I think you should include a link that points to your own assessment of PostgreSQL* ( http://photo.net/wtr/aolserver/introduction-2.html ) instead of "force feeding" Oracle, especially after espousing Open Source, and then rejecting your own advice. It would appear to be a more balanced view, even if you believe the effort outweighs the cost difference. Care and feeding of Oracle is FAR from effortless! Later, Jerry S. * "The open-source purist's only realistic choice for an RDBMS is PostgreSQL, available from www.postgresql.org. In some ways, PostgreSQL has more advanced features than any commercial RDBMS. Most important, the loosely organized unpaid developers of PostgreSQL were able to convert to an Oracle-style multi-version concurrency system (see below), leaving all the rest of the commercial competition deadlocked in the dust."