if you mean calling ejb3 from jbpm, then yes, just like ejb2, webservices, plain java, ....
ahhh ok !!
but, i look ej3 and isn't there a conflict beetween Jbpmcontext(JBPM) and JPA(EJB3) for the data persistence ?
so, i want to do an EJB application with jbpm API, but i don't know how can i do the gathering of data from the database or the persistence !!