Have started using Activiti 5.15.1 and came to know that it has support of creating business objects. Please let me know how to create data objects using 5.15.1.
For the use and behaviour, see http://www.activiti.org/userguide/#dataobjects. AFAIK, nothing has been added to the activiti designer to support business-objects modeling, as it's still in experimental state. You can edit the model by hand, though…