Chapter 18. Architecture Diagrams
18.1 Architecture Context Diagrams
The architecture context diagram (ACD) establishes the information boundary between the system being implemented and the environment in which the system has to operate. The ACD is the highest-level diagram for any system. It represents the system as a source for information flowing out to entities in the environment and as a sink for information that it receives from these entities.
The elements that make up the ACD are: one architecture module, representing the system; terminators that represent entities in the environment with which the system communicates; and information flow vectors that represent the communications that take place between the system and those entities. ...