The BPM subsystem employs the Activiti Engine for business processes execution. The modified editor from Activiti Explorer is used to model processes using BPMN 2.0 notation. In addition to Activiti framework capabilities, the BPM subsystem provides additional functionality which is described in this section. A description of the Activiti framework is out of this manual scope and can be found at http://www.activiti.org/userguide/.