message saveOpenWorkItemRequest
parts 
saveOpenWorkItemDoc
element dto:saveOpenWorkItem
used by 
Operation saveOpenWorkItem in PortType WorkItemManagementService
source  
<wsdl:message name="saveOpenWorkItemRequest">
  <wsdl:part name="saveOpenWorkItemDoc" element="dto:saveOpenWorkItem"/>
</wsdl:message>

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