message listBusinessParametersRequest
parts 
parameters
element attr:listBusinessParameters
used by 
Operation listBusinessParameters in PortType AttributeService
source  
<wsdl:message name="listBusinessParametersRequest">
  <wsdl:part name="parameters" element="attr:listBusinessParameters"/>
</wsdl:message>

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