Rate belongs to software and databases
FIG Gane-Sarson known source, flow, processing and storage means where data flow diagram for describing the relationship between data flow system which can be integrated to reflect the data in the system, particularly the image data stream may be manifested.
In larger projects, data may go from one organization to another organization, then ran to a tissue, complex data flow, data flow diagrams the flow of the data can be visually displayed, thereby providing support to the project schedule and project evaluation .
1, case
Look like the data flow chart in the case, the visual experience
2. Create
New> Categories> software and databases> Data Flow Model FIG.
FIG. There is a data stream table, this is another view both big difference.
3, shape
Process: i.e., it may also generate data digest data, into: the digest data; out: generating data.
Interface: General external entities, such as people, other systems or that other modules.
Data storage: a data storage medium, into: storing data; a: query output, output data.
Stream: connecting three other shapes, it differs from the flowchart that the connecting lines flowchart generally activities, selection, an operation, but here is a noun, is the data, but also the core of the data stream , such as orders, cancel orders data.
4, operation
slightly.