data flow diagram

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data flow diagram

[′dad·ə ¦flō ‚dī·ə‚gram]
(computer science)
A chart that traces the movement of data in a computer system and shows how the data is to be processed, using circles to represent data. Also known as bubble chart; system flowchart.

Data Flow Diagram

(programming)
A graphical notation used to describe how data flows between processes in a system. Data flow diagrams are an important tool of most structured analysis techniques.

http://smartdraw.com/resources/centers/software/dfd.htm.

data flow diagram

A description of data and the manual and machine processing performed on the data as it moves and changes from one stage to the next. It also includes the locations where the data are placed in permanent storage (disk, tape, etc.).
References in periodicals archive ?
For example, students learn how an entity-relationship diagram relates to a dataflow diagram, and how a dataflow diagram can be mapped to a process flow chart.
A dataflow diagram (DFD) is a labeled directed hypergraph in which the nodes represent functions and the edges dataflows between functions.
All versions of dataflow modeling since DeMarco [1978] use hierarchical DFDs to reduce the complexity of a large dataflow diagram.
In other words, in structured analysis, a context diagram is a dataflow diagram.
A process dependency diagram is similar to a dataflow diagram in that both diagrams represent a collection of related processes.
Similarly, a dataflow diagram syntax fits a functional computational model and not a production system, while graphical re-write rules fit production systems and not functional computation.
These languages resemble flow charts, dataflow diagrams, and graphical rewrite rules.
Next, this preliminary design is restated as a dataflow diagram with transforms.
In this analysis, programs are blueprinted as dataflow diagrams or bubble charts where the transforms-bubbles are connected by arrows which represent data that is output by one transform and input by another.
While the solution looks like a traditional, top-down functional decomposition, the book also advocates a "middle-out" approach based on Essential Systems Analysis [11], and an interpretation of dataflow diagrams where each bubble represents the system response to an event.
We then analyze the data offsite and prepare up-to-date network diagrams, dataflow diagrams, zone and conduit diagrams, and a vulnerability register," Cusimano says.
It contains a suite of design intent capture tools, including intelligent HDL text editing, graphic finite state machine descriptions and dataflow diagrams that allow the designer to express and manage all aspects of design intent in the most natural and intuitive form.