xsd-derived:activity

				All standard WS-BPEL 2.0 activities in alphabetical order. Basic activities
				and structured activities.
				Addtional constraints:
				- rethrow activity can be used ONLY within a fault handler
				  (i.e. "catch" and "catchAll" element)
				- compensate or compensateScope activity can be used ONLY
				  within a fault handler, a compensation handler or a termination handler