RE: [wsbpel-implement] Fault tolerance considerations
<sequence> <receive name="rcv" ... /> <assign name="as1" ... /> <invoke name="inv" ... /> <assign name="as2" ... /> <reply name="rep" ... /> </sequence>
<sequence> <receive name="rcv" ... /> <assign name="as1" ... /> <invoke name="inv" ... /> <assign name="as2" ... /> <reply name="rep" ... /> </sequence>