June 2010
Intermediate to advanced
266 pages
5h 55m
English
Content preview from Patterns of Data ModelingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 14
Generic Diagrams
A generic diagram is a picture for viewing an underlying model. I use the term generic diagram because it is a starting point for various kinds of diagrams such as data structure diagrams, data flow diagrams, state diagrams, and equipment flow diagrams.
Generic diagrams have a number of features.
- A diagram is a picture with underlying semantics.
- The user clicks through an icon to access semantic content from the background model.
- Lines connect icons and arrowheads indicate the direction of flow.
- Some diagrams restrict connections to discrete locations on icons. Other diagrams permit connections anywhere on an icon.
- An icon can expand into subdiagrams.
- A diagram can be rendered through different notations.
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