Creating an Exchange Contract Diagram
With HOPEX Business Process Analysis, an exchange contract is represented by an Exchange Contract Diagram (BPMN).
To create an exchange diagram:
1. Right-click the conversation containing the exchange.
2. In the pop-up menu of the exchange, select New > Exchange Contract Diagram (BPMN).
The diagram opens with the exchange contract frame and the two roles representing invoker or invoked.
Defining exchange and exchange contract uses
In an Exchange Contract Diagram (BPMN), operations are described by:
• Exchange Uses
• Exchange Contract Uses
An exchange use represents the usage of an exchange in another exchange contract.An exchange contract use is associated with an exchange contract. It enables representation of complex exchanges.To create an exchange contract use:
1. Click the Exchange Contract Use button 
and click in the diagram within the exchange contract frame.
and click in the diagram within the exchange contract frame.The creation dialog box opens.
2. Click the arrow at the right of the Specification box.
3. Select List in the drop-down list and select the exchange contract associated with the exchange contract use.
4. In the From field, select the described exchange role connected to the Invoker role of the exchange used.
5. In the To field, select the described exchange role connected to the Invoked role of the exchange used.
6. Click Finish.