Definition

An exchange specifies message flow exchanges between two participants.

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.

Use in a Process Diagram

A conversation describes an exchange of several message flows between two roles.

A composite conversation is described by an exchange contract. This exchange contract uses other exchanges or exchange contracts.

Use in an Exchange Contract Diagram

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.