message listAttributeNamesResponse
parts 
response
element dir:listAttributeNamesResponse
used by 
Operation listAttributeNames in PortType DirectoryService
source  
<wsdl:message name="listAttributeNamesResponse">
  <wsdl:part name="response" element="dir:listAttributeNamesResponse"/>
</wsdl:message>

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