porttype WorkGroupManagementService
**PRIVATE API - Reserved for internal use**
operations 
startGroup
Start a new work group
inputimpl:startGroupRequest
Request message (uses dto:startGroup element): Identifies the type of work group that is to be started.
outputimpl:startGroupResponse
Response message (uses dto:startGroupResponse element): Contains the ID of the started work group.
faultimpl:internalServiceFault
Error message (uses ex:InternalServiceFault element): An internal service fault occurred.
faultimpl:securityFault
Error message (uses deex:SecurityFault): The request failed due to authentication or authorisation failure.

endGroup
Destroy an existing work group
inputimpl:endGroupRequest
Request message (uses dto:endGroup element): Identifies the work group that is to be ended.
outputimpl:endGroupResponse
Response message (uses dto:endGroupResponse element): Specifies whether the request succeedeed or failed.
faultimpl:workGroupFault
Error message (uses ex:WorkGroupFault element): The work group cannot be ended because it still has associated work items.
faultimpl:invalidWorkGroupFault
Error message (uses ex:InvalidWorkGroup element): The specified work group does not exist.
faultimpl:internalServiceFault
Error message (uses ex:InternalServiceFault element): An internal service fault occurred.
faultimpl:securityFault
Error message (uses deex:SecurityFault): The request failed due to authentication or authorisation failure.
used by 
binding WorkGroupManagementService_EP
source 
<wsdl:portType name="WorkGroupManagementService">
  <wsdl:documentation>**PRIVATE API - Reserved for internal use**</wsdl:documentation>
  <wsdl:operation name="startGroup">
    <wsdl:documentation>Start a new work group</wsdl:documentation>
    <wsdl:input name="startGroupRequest" message="impl:startGroupRequest">
      <wsdl:documentation>Request message (uses dto:startGroup element): Identifies the type of work group that is to be started.</wsdl:documentation>
    </wsdl:input>
    <wsdl:output name="startGroupResponse" message="impl:startGroupResponse">
      <wsdl:documentation>Response message (uses dto:startGroupResponse element): Contains the ID of the started work group.</wsdl:documentation>
    </wsdl:output>
    <wsdl:fault name="InternalServiceFault" message="impl:internalServiceFault">
      <wsdl:documentation>Error message (uses ex:InternalServiceFault element): An internal service fault occurred.</wsdl:documentation>
    </wsdl:fault>
    <wsdl:fault name="SecurityFault" message="impl:securityFault">
      <wsdl:documentation>Error message (uses deex:SecurityFault): The request failed due to authentication or authorisation failure.</wsdl:documentation>
    </wsdl:fault>
  </wsdl:operation>
  <wsdl:operation name="endGroup">
    <wsdl:documentation>Destroy an existing work group</wsdl:documentation>
    <wsdl:input name="endGroupRequest" message="impl:endGroupRequest">
      <wsdl:documentation>Request message (uses dto:endGroup element): Identifies the work group that is to be ended.</wsdl:documentation>
    </wsdl:input>
    <wsdl:output name="endGroupResponse" message="impl:endGroupResponse">
      <wsdl:documentation>Response message (uses dto:endGroupResponse element): Specifies whether the request succeedeed or failed.</wsdl:documentation>
    </wsdl:output>
    <wsdl:fault name="WorkGroupFault" message="impl:workGroupFault">
      <wsdl:documentation>Error message (uses ex:WorkGroupFault element): The work group cannot be ended because it still has associated work items.</wsdl:documentation>
    </wsdl:fault>
    <wsdl:fault name="InvalidWorkGroup" message="impl:invalidWorkGroupFault">
      <wsdl:documentation>Error message (uses ex:InvalidWorkGroup element): The specified work group does not exist.</wsdl:documentation>
    </wsdl:fault>
    <wsdl:fault name="InternalServiceFault" message="impl:internalServiceFault">
      <wsdl:documentation>Error message (uses ex:InternalServiceFault element): An internal service fault occurred.</wsdl:documentation>
    </wsdl:fault>
    <wsdl:fault name="SecurityFault" message="impl:securityFault">
      <wsdl:documentation>Error message (uses deex:SecurityFault): The request failed due to authentication or authorisation failure.</wsdl:documentation>
    </wsdl:fault>
  </wsdl:operation>
</wsdl:portType>

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