I know that jBPM is designed to natively support BPMN2.0 but I wonder if it is updated to the latest version? I see on OMG webpage that BPMN2.0 spec is dated to January 2011. Before that I suppose there was some beta version that may be different to the newest spec.
As all the BPMS vendors we are trying to implement the BPMN2 spec. The spec will mutate over the years to fill the gaps and as it becomes adopted it will be improved. if you find that something is not implemented yet, please file an issue in jira and we will tackle down asap.