
Composite structure diagrams are a UML tool used to model a system’s internal structure, showing how its parts, ports, and connectors interact at runtime. Unlike class diagrams, they focus on the internal composition and collaboration of components.

Composite structure diagrams are a UML tool used to model a system’s internal structure, showing how its parts, ports, and connectors interact at runtime. Unlike class diagrams, they focus on the internal composition and collaboration of components.

Visualizing how a system behaves is key to effective software design, and UML (Unified Modeling Language) makes this easy. Among its behavioral diagrams, the Sequence Diagram and Activity Diagram stand out for showing interactions and workflows. This guide explores Sequence vs Activity Diagram, highlighting their differences, components, and when to use each for clear, actionable system modeling.