DataNucleus Access Platform version 1.1 extends the 1.0 capabilities aiming for increased stability, performance as well as adding on a more complete feature set for some datastores. This version has been upgraded to support db4o 7.0 and above (among other changes). If you require db4o 6.x please use Access Platform 1.0.For instructions on how to use db4o with DataNucleus see this page. Details for this version available here.