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  • Elements of a component diagram
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Overview
A component diagram shows the physical and static architecture of a system software. For example: source files, libraries, executables, etc.
For example, the diagram below presents the steps of a program that allows users to log in in text mode in Unix. The "login" program uses the data from the "etc/passwd" file and a library:
Elements of a component diagram
A component diagram includes the following elements:
  • module: represents the different physical elements that build a software system. For example: a file, a library, etc, ...
    A module can be represented:
    • by a specification that shows the module interface. This specification can be generic for configurable classes.
    • by its body that presents the module implementation.
  • task: represents a component that has its own control flow (thread).
  • main program of the software system.
  • subprogram: groups procedures and functions that do not belong to any classes.
  • package: divides and organizes the diagram representation (in the same way that directories organize files).
For more details on the actions available on component diagrams, see Operations performed on component diagrams.
Minimum version required
  • Version 9
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