Per the JBPM5 docs:
jBPM5 does not implement all elements and attributes as defined in the BPMN 2.0 specification. We do however support a significant subset, including the most common node types that can be used inside executable processes. This includes (almost) all elements and attributes as defined in the "Common Executable" subclass of the BPMN 2.0 specification, extended with some additional elements and attributes we believe are valuable in that context as well. The full set of elements and attributes that are supported can be found below, but it includes elements like:
- Flow objects
- Events
- Start Event (None, Conditional, Signal, Message, Timer)
- End Event (None, Terminate, Error, Escalation, Signal, Message, Compensation)
The Oryx Designer also lists a "Start Message Event" node in full view:
https://www.evernote.com/shard/s25/sh/73923dca-ac7b-4dcd-8e1e-b3a7f7d0976c/0287847e0cd730d78f386da6f93d9d1d/res/a1406c45-37ac-4ce7-8c30-60580c5e110a/skitch.png
However, it's unclear from the docs if this node type is supported by the jBPM engine. Any advice or examples?