Describing Exchanges
Content of an interaction is described by an exchange contract.
An exchange contract is a model of a contract between organizational entities. This contract is described by exchanges between an initiator role and one or several contributor roles.
With the MEGA Service Design option, an exchange contract is described by a series of exchanges or exchange contract uses. An exchange use is associated with an exchange.
An exchange use represents the usage of an exchange in another exchange contract.
An exchange specifies message flow exchanges between two participants.
An exchange is described by an exchange diagram presenting the sequence flow of messages exchanged.
The customer identification service protocol begins by sending information enabling identification of the customer. An error message appears if the customer is not found, otherwise customer information is sent (customer identification, status of orders, etc.).
