message cancelWorkItemRequest
parts 
request
element dto:baseWorkRequest
used by 
Operation cancelWorkItem in PortType WorkPresentationService
source  
<wsdl:message name="cancelWorkItemRequest">
  <wsdl:part name="request" element="dto:baseWorkRequest"/>
</wsdl:message>

WSDL documentation generated by XMLSpy WSDL Editor http://www.altova.com/xmlspy