Explain DFD Components

DFD can represent Source, destination, storage and flow of data using the following set of components

Explain DFD Components
  • Entities – Entities are source and destination of information data. Entities are represented by rectangles with their respective names.
  • Process – Activities and action taken on the data are represented by Circle or Round-edged rectangles.
  • Data Storage – There are two variants of data storage – it can either be represented as a rectangle with absence of both smaller sides or as an open-sided rectangle with only one side missing.
  • Data Flow – Movement of data is shown by pointed arrows. Data movement is shown from the base of arrow as its source towards head of the arrow as destination

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