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Soft Exam System Architect Concise Tutorial | Case Analysis | Requirement Analysis
2022-07-30 10:10:00 【Wanmao Society】
Article table of contents
Data Flow Diagram
Data Flow Diagram (DFD), from the perspective of data transmission and processing, uses graphical symbols to describe the function of each component in the system and the transmission of data between them by using graphical symbols to illustrate the system.completed function.
Elements of a data flow diagram
DFD includes: Data Streaming, Processing, Data Storage (Files), External Entities.
| element | Description | Legend |
|---|---|---|
| Data flow | Consists of a fixed set of data&# |
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