message getOfferSetRequest
parts 
getOfferSetDoc
element dto:getOfferSet
used by 
Operation getOfferSet in PortType WorkItemManagementService
source  
<wsdl:message name="getOfferSetRequest">
  <wsdl:part name="getOfferSetDoc" element="dto:getOfferSet"/>
</wsdl:message>

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