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A data-flow diagram is a way of representing a flow of data through a process or a system (usually an information system). The DFD also provides information about the outputs and inputs of each entity and the process itself. A data-flow diagram has no control flow — there are no decision rules and no loops. Specific operations based on the data can be represented by a flowchart. There are several notations for displaying data-flow diagrams. The notation presented above was described in 1979 by Tom DeMarco as part of structured analysis.

Attributes	Values
rdf:type	Thing
rdfs:label	Data-flow diagram (en)
rdfs:comment	A data-flow diagram is a way of representing a flow of data through a process or a system (usually an information system). The DFD also provides information about the outputs and inputs of each entity and the process itself. A data-flow diagram has no control flow — there are no decision rules and no loops. Specific operations based on the data can be represented by a flowchart. There are several notations for displaying data-flow diagrams. The notation presented above was described in 1979 by Tom DeMarco as part of structured analysis. (en)
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Subject	Data management Diagrams Systems analysis Graph drawing Information systems Modeling languages
Link from a Wikipage to an external page	http://www.agilemodeling.com/artifacts/dataFlowDiagram.htm
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Link from a Wikipage to another Wikipage	Flowchart Process Unified Modeling Language Activity diagram State diagram Process specification Business Process Model and Notation Business process modeling Data management Diagrams Systems analysis Graph drawing Information systems Modeling languages Directed acyclic graph Petri net Workflow Christopher P. Gane DRAKON List of graphical methods Pipeline (software) Tom DeMarco Control-flow diagram Edward Yourdon Data dictionary Data island Data modeling Dataflow Entity–relationship model Function model Functional flow block diagram IDEF0 Scott Ambler System context diagram Information system Value-stream mapping Structure chart Structured analysis Structured analysis and design technique dbr:Page-Jones,_Meilir dbr:Stahlknecht,_P.
has abstract	A data-flow diagram is a way of representing a flow of data through a process or a system (usually an information system). The DFD also provides information about the outputs and inputs of each entity and the process itself. A data-flow diagram has no control flow — there are no decision rules and no loops. Specific operations based on the data can be represented by a flowchart. There are several notations for displaying data-flow diagrams. The notation presented above was described in 1979 by Tom DeMarco as part of structured analysis. For each data flow, at least one of the endpoints (source and / or destination) must exist in a process. The refined representation of a process can be done in another data-flow diagram, which subdivides this process into sub-processes. The data-flow diagram is a tool that is part of structured analysis and data modeling. When using UML, the activity diagram typically takes over the role of the data-flow diagram. A special form of data-flow plan is a site-oriented data-flow plan. Data-flow diagrams can be regarded as inverted Petri nets, because places in such networks correspond to the semantics of data memories. Analogously, the semantics of transitions from Petri nets and data flows and functions from data-flow diagrams should be considered equivalent. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Data-flow_diagram
is Wikipage redirect of	Physical Data Flow Data Flow Diagram Data flow diagram External entity Logical Data Flow Data flow model Dataflow diagram
is Link from a Wikipage to another Wikipage of	Flow-based programming Flow diagram Flow process chart Flowchart Fourth-generation programming language Activity diagram Algorithm characterizations Black box Block cipher Block diagram Bubble chart Business Process Model and Notation Business diagram Business requirements Christopher P. Gane Creately DFD Decision intelligence Linda (coordination language) List of graphical methods List of important publications in computer science Communication diagram Communication protocol Computer-aided software engineering Computer performance

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