Hi Jean-Noel
I had a look on the ticket in Jira after you gave the hint. Actually, the ticket 2922 (see https://issues.jboss.org/browse/JBPM-2922) seems to solve the issue. I applied the patches from the 10th September given there. After a brief test, it seems to solve the issue, without the introduction of any additional attributes in the xml. However, it is not clear when this patch will be applied to the repository.
regards
Silvio