A process service diagram provides a graphical view of the services, operations, and interfaces available in your system.
The PSD is only available with orchestration languages.
You can create and import service providers (see Service Providers (BPM)) in a PSD (see Importing a Service Provider from a WSDL File and Importing a Service Provider from an OOM or a PDM).
In the following example the Process Order service provider depends on the Order Shipment service provider: