The release of jBPM 4.3 is a great milestone, because jBPM 4.3 includes BPMN 2.0.
BPMN2, Business Process Modeling Notation 2.0 adds execution semantics to the specification and is a standard accepted in IT. They were succesfull with including the BPMN implementation
 as an integral part of the jBPM, which means that no database or API changes are required.

The major achievement of this release is the native BPMN 2.0 execution on top of the PVM ( process virtual machine).

For more information see this video from Joram Barrez.

The complete distribution zip file can be found here.