Design Data Flow. DFD Library


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Data Flow Diagram (DFD) notations

"A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modeling its process aspects. Often they are a preliminary step used to create an overview of the system which can later be elaborated. DFDs can also be used for the visualization of data processing (structured design). A DFD shows what kinds of information will be input to and output from the system, where the data will come from and go to, and where the data will be stored. It does not show information about the timing of processes, or information about whether processes will operate in sequence or in parallel (which is shown on a flowchart)." [Data flow diagram. Wikipedia]

The Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park provides three vector stencils libraries for drawing DFD using the ConceptDraw PRO diagramming and vector drawing software.

Design Data Flow

Pic 1. ConceptDraw Software for Design Data Flow

The design elements library "Data flow diagram (DFD)" contains 15 symbols for drawing both context-level data flow diagram and Level 1 DFD:

  • State (multi state)
  • Start state (multi state)
  • Stop state (multi state)
  • External interactor
  • Stop state
  • Data store
  • Entity relationship
  • Entity
  • Oval process
  • Entity with ID and location (rounded corners)
  • Data store (with ID)
  • Entity (rounded corners)
  • Object

Design Data Flow - DFD Symbols

Pic 2. Design Data Flow — DFD Symbols

The design elements library "DFD, Gane-Sarson notation contains 12 symbols of Gane-Sarson DFD notation. The design elements library "DFD, Yourdon and Coad notation contains 22 symbols of Yourdon/DeMarco DFD notation.

Gane-Sarson notation:

  • External entity
  • Process w / Location
  • Data store
  • Jump
  • Angled connector
  • Top to bottom variable
  • Bottom to side
  • Side to side Side to same side
  • Top to top side
  • Process

Design Data Flow - Gane-Sarson notation symbols

Pic 3. Design Data Flow — Gane-Sarson notation symbols

Yourdon and Coad notation:

  • Class and object
  • Class
  • Object state
  • Generalization and specialization structure
  • Whole-part structure
  • Condition
  • Loop
  • External interactor
  • Data process
  • Multiple process
  • State
  • Multi-state
  • Stop state
  • Process
  • Process (offset)
  • Center to center
  • Center to center #2
  • Loop on center
  • Data store
  • Instance
  • Message

Design Data Flow - Yourdon and Coad notation symbols

Pic 4. Design Data Flow — Yourdon and Coad notation symbols


Use these DFD symbol libraries to design the process-oriented models, data-oriented models, data flowcharts, data process diagrams, structured analysis diagrams, and information flow diagrams.

Pic 5. Design Data Flow. DFD Library




Data Flow Diagrams Sample:














Use Product:

  • Data Flow Diagrams Software
  • UML Diagrams Software
  • Vector Drawing Tools
  • Cross Platform Compatibility
  • Presentation Mode
  • Over 2 000 vector stencils
  • Export to vector graphics files

Use Solution:

  • Graphical representation of the "flow" of data through an information system
  • Modeling process aspects
  • An overview of the system
  • For the visualization of data processing (structured design)
  • What kinds of information will be input to and output from the system
  • Where the data will come from and go to
  • Where the data will be stored


Compatibility: Apple® OS X 10.10 or later
Microsoft® Windows® 7/8.1/10

Price: ConceptDraw PRO US$199
 
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