This describes some work I did in the late 90s. It has some limitations today, primarily because modern object-relational mapping systems, like JPA, do not handle run-time schema changes very well. Treat this as a historical document telling you how enterprise software was built in the days when every company also needed to write its own application platform.
This document describes how schema extensibility is typically achieved in commercial enterprise software applications; in particular, in customer relationship management (CRM) applications.
