Exception Handling
BPEL4WS provides a set of facilities to recover from errors while executing a process or handling exceptions. BPEL4WS makes good use of the exception handling capabilities already built into WSDL. As we described above, you can leverage the <throw> and <catch> constructs. What's more, you can leverage the notion of compensation, which allows the process designer to implement compensating actions for particular irreversible actions. This is supported recursively in BPEL4WS using the notion of scope. Scope is essentially a unit of work for compensation. In other words, BPEL4WS supports transactional-type characteristics.
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