message listLDAPSourcesRequest
parts 
parameters
element ldapservice:listLDAPSources
used by 
Operation listLDAPSources in PortType LDAPService
source  
<wsdl:message name="listLDAPSourcesRequest">
  <wsdl:part name="parameters" element="ldapservice:listLDAPSources"/>
</wsdl:message>

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