A dialog flow represents the movement and transfer of system control between procedure steps. The dialog flow for a client/server application illustrates the passing of control from the client environment to the server environment and back to the client environment.
Dialog flows can occur within a business system (internal flows) or between business systems (external flows) within the same model. A dialog flow can usually originate from any procedure step, but must go into the first procedure step of the destination procedure. A dialog flow originating from a server procedure step can flow only to another step within that same server procedure. A flow cannot originate with a server procedure step and flow to client procedure step.
In the DLG, a flow is represented by a vertical arrow between procedures. The arrow indicates the direction and movement of control from one procedure step to another.
There are two types of dialog flows-a transfer and a link. Each type is represented by a different arrow on the DLG.
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