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Unified Modeling Language (UML)

The Unified Modeling Language (UML) is a graphical model used to create specifications for various components of a software system. The parts of UML include:  Class Diagram : similar to E – R diagram  Use case Diagram : shows the interaction between users and the system, and the steps of tasks that user performs.   Activity Diagram : depicts the flow of tasks between various components of the system.  Implementation Diagram : shows the system components (both, software level and hardware level) and their interconnections