Activity diagram is an important behavior modeling tool in UML . It is mainly used to describe a series of activities or operations in a system or business process . It emphasizes the control flow between objects, can clearly show how a series of activities or operations are executed in a specific order, and supports the representation of concurrency and synchronization. This article will mainly explain the practical application and drawing tutorial of UML activity diagram in software development.

Activity diagram is one of the diagrams in UML that describes the dynamic behavior of the system. It is mainly used to show the activities or actions of the classes involved in the behavior and describe the execution process of various activities in the system, including business processes, software operations or interactions between objects. The following will explain the UML activity diagram from three aspects: the concept and importance of activity diagram, the difference between activity diagram and flow chart, and the components of activity diagram.

A sequence diagram is a UML interaction diagram. It shows the dynamic collaboration between multiple objects by describing the time sequence of messages sent between objects. It is widely used in almost all industries to sort out business processes and make the business look clear and easy to understand. This article will explain the definition of UML sequence diagram, drawing tutorials and case sharing.

UML use case diagram is one of the commonly used diagrams for product managers and technicians . It is the product of demand analysis and is widely used in the demand analysis stage of software development. It describes the functions of the system and the interaction between the user and the system in a graphical way . With the help of the use case diagram, participants can discuss the problem in a visual way, which can reduce a lot of communication barriers. Next, we will discuss and learn the use case diagram in combination with the use case diagram example in ProcessOn .

UML class diagram graphically displays the classes in the system, their relationships, and the internal structure of the classes. These diagrams not only help developers understand the overall architecture of the system, but also promote communication and collaboration in teamwork, ensuring that all members have a common understanding of the design. This article will explain the concepts, rules, and drawing methods of class diagrams in detail, and share a large number of cases.

The UML use case diagram is a view used to describe system functions, consisting of actors, use cases, and the relationships between them. It is a model of system functions that can be observed by external users called actors. Figure. Use case diagrams are often used in the requirements analysis phase. This article will explain the purpose and composition of use case diagrams in detail.

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Use case diagram refers to a view used to describe system functions consisting of actors (Actors), use cases (Use Case), boundaries and the relationships between them. It is a model diagram of the system's functionality as observable to external users (called actors). The purpose of a use case diagram is to capture the dynamic aspects of a system. It is used to collect the system's requirements, including internal and external influences, which are mostly design requirements.

UML package diagram is usually used to describe the logical architecture of the system - layers, subsystems, packages, etc. It is a combination of basic static diagrams and is a static diagram.

This article uses the ProcessOn drawing tool to quickly and comprehensively explain what a UML diagram is? UML diagrams are divided into types and the conceptual uses of each diagram. Learn to use this tool efficiently to improve development efficiency and quality.