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This tutorial shows us the overall process for adding db4o persistence to a simple application using JPOX.

The basic steps are:

1. Step 1 : Design your domain/model classes as you would do normally
2. Step 2 : Define their persistence definition using Meta-Data.
3. Step 3 : Compile your classes, and instrument them (using the JPOX enhancer).
4. Step 4 : Generate the database tables where your classes are to be persisted.
5. Step 5 : Write your code to persist your objects within the DAO layer.
6. Step 6 : Run your application.

For detailed information please see:

http://www.jpox.org/docs/guides/jdo/db4o_tutorial.html