Major elements of the UML use case diagram of Chat Application are shown on the picture below. The main actors of Chat Application in this Use Case Diagram are: Super Admin, System User, User, Groups, who perform the different type of use cases such as Manage Chat, Manage User Profile, Manage Chat History, Manage Group Chat, Manage Notification, Manage Delete Chat, Manage Smiley Chat, Manage Users and Full Chat Application Operations. It represents the methodology used in system analysis to identify, clarify, and organize system requirements of Chat Application. This Use Case Diagram is a graphic depiction of the interactions among the elements of Chat Application.
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