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Data Flow Diagrams

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Data Flow Diagrams are used to analyse system relationships and data via a process-oriented workflow. They do represent graphically data flow through an information system. They do not illustrate programming logic. Data flow symbols are used to represent data source, flow, storage and processes:

Sample Data Flow Diagrams

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Context Level (level 0) Data Flow Diagram → → Level 1 Data Flow Diagram

older notes on DFDs