About the portType definition
The portType element defines a structure for each operation in the Actuate schema. A unique name identifies the portType:
<portType name="ActuateSoapPort">
For most operations, portType defines an input message, the request, and an output message, the response.
The following example shows the portType definition for ActuateSoapPort:
<operation name="GetFileACL">
<input message="wsdlns:GetFileACL"/>
<output message="wsdlns:GetFileACLResponse"/>
If an operation does not require a response, portType defines only an input message. In the Microsoft .NET version of the schema, the operations also include a header element.