The message flow between different participants is represented by an ARIS connection type of the same name. It connects two pools or the objects within a pool. The attributes and model associations of message flow are described in chapter Message flow.

To show the messages being exchanged in message flows the ARIS object type message represented by a message symbol is used. The message flow connection type is replaced by two connection types: sends and is received from. This work around is required due to the fact that it is not possible in ARIS to assign object types to connection types.

The program will display the sends and is received from connection types like a normal message flow.