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The top documents tagged [data flows data flows]
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1 CIS 551 Data Flow Diagrams class file: dataflows.ppt
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Practical Significance of DFDs Many older information systems (legacy systems): Are mainframe-based (inaccessible to most non-IT users); Use non-relational
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DFD examples 1. Creating DFDs 2 Define Entities External entities represent persons, processes or machines which produce data to be used by the system
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