message openWorkItemRequest
parts 
openWorkItemDoc
element dto:openWorkItem
used by 
Operation openWorkItem in PortType WorkItemManagementService
source  
<wsdl:message name="openWorkItemRequest">
  <wsdl:part name="openWorkItemDoc" element="dto:openWorkItem"/>
</wsdl:message>

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