New version of XPDL 2.2 is here.
XPDL is the Serialization Format for BPMN
BPMN (Business Process Modeling Notation) is a visual process notation standard from the OMG, endorsed by WfMC, and broadly adopted across the industry.
BPMN standard used to define only the look of how the process definition is displayed on the screen.
An editor for Eclipse Luna can be downloaded from within Eclipse using http://download.eclipse.org/bpmn2-modeler/updates/kepler/1.0.1