message createProcessInstanceRequest
parts 
params
element pm:createProcessInstanceInput
used by 
Operation createProcessInstance in PortType processManagement
source  
<wsdl:message name="createProcessInstanceRequest">
  <wsdl:part name="params" element="pm:createProcessInstanceInput"/>
</wsdl:message>

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