message startPageFlowRequest
parts 
parameters
element pageflow:startPageFlow
used by 
Operation startPageFlow in PortType PageFlowService
source 
<wsdl:message name="startPageFlowRequest">
  <wsdl:part name="parameters" element="pageflow:startPageFlow"/>
</wsdl:message>

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