Contains special shapes and setting for creating COM and OLE diagrams or diagrams of public exposed interfaces, COM interfaces, and OLE interfaces in object-oriented programming.

In Edraw Professional, the Data Flow Model Diagram template and shapes are in the Software folder.

Edraw is a very easy-to-use and intuitive database design tool and data flow model diagramming tool which can save you hundreds hours of work. Edraw is not only an excellent tool for database & ER Diagram, but also the one that allows you to reverse engineer already existing database structures, create detailed HTML or PDF reports.

Who can use them and how?

• Software designers: Model how data is processed by a system using Gane-Sarson (DFD) notation.

• Software developers: Write pseudo-code for an existing process data flow.

• Development managers: Describe nested layers of data flow throughout systems.

Data Flow Model Diagram Symbols

The following templates are described with respect to these conventions. These Edraw templates include nodes with a sub-paging feature that facilitates creating subordinate diagrams, and in navigating multi-tiered models after a design has been completed.

Examples of Data Flow Model Diagram

Data Model Flow Diagram

The formal, structured analysis approach employs the data-flow diagram (DFD) to assist in the functional decomposition process. I learned structured analysis techniques, and those techniques are representative of present conventions. To summarize, DFD's are comprised of four components:

• External interactors are represented by a rectangle.
• Data stores are represented by an open rectangle (2 or 3 sides).
• Processes are represented by any rounded object (a circle, oval, or square with rounded corners). A DFD process may represent system function at one of various levels, atomic through aggregate.
• Data flows are represented by arrows, with labels indicating their content.

Relative Resource

Data Flow Diagram Software

UML Diagram Software