The image shows a diagram of a one-way message between a client BPEL process and a service BPEL process. The following actions take place:
The client BPEL process has an invoke activity that sends the message.
The invoke activity sends the message through a WSDL partner link to the service BPEL process. The WSDL partner link defines the interaction.
The service BPEL process uses a receive activity to accept the message.