What is JDO?

JDO is Java Data Objects, a datastore-agnostic interface for storing Java objects in transactional datastores.

I’d like to find out more about the project and possibly contribute. What do I do next?

Participation on the project is via the mailing list and the source code repository. You join by subscribing to the mailing list and participating in discussions. You can help by contributing your ideas, enthusiasm, code, documentation, and tests. The fundamental tenet of the Apache Software Foundation is that great communities build great code. The emphasis is on community; the code comes from that. If you want to help, just join the mailing list, see what needs to be done, and do it. Welcome!

Where is the mailing list, and how can I subscribe?

The developers mailing list is jdo-dev@db.apache.org, a high-volume list currently receiving from 100 to 300 messages a month.
The users mailing list is jdo-user@db.apache.org.

Does this project use a wiki?

It does - the JDO wiki complements the work taking place on the mailing list and provides additional information on the project.