I have created a new blog post on the latest BMM upgrade. From the post:
The openEHR Basic Meta-Model (BMM) that has been in use in some form for nearly 10 years now was recently upgraded to version 3.0.0 (from 2.x), with the persistence format (now called P_BMM) being backwards-compatibly upgraded to version 2.3. The purpose of the upgrade was to improve the separation of class and type, and to greatly strengthen the semantics of generic types and classes.
- thomas