Composite Structure diagrams depict the internal structure of a classifier, as well as the internal details of a collaboration.

There you can define connection details between parts, show which port connects to which other one, insert collaboration uses within collaboration, etc.

This kind of diagram is used at a fine level of detail, to express how occurrences (parts) are related and connected.

: CompositeStructureDiagram (architecture_autodiagram)
Figure 84 : CompositeStructureDiagram (architecture_autodiagram)