message workItemUnavailableFault
parts 
fault
element ex:WorkItemUnavailable
used by 
Operation openNextWorkItem in PortType WorkPresentationService
Operation openWorkItem in PortType WorkPresentationService
source  
<wsdl:message name="workItemUnavailableFault">
  <wsdl:part name="fault" element="ex:WorkItemUnavailable"/>
</wsdl:message>

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