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Are there any reference cards or cheats sheets available for UML?
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This can be represented with the following class diagram. The fields and methods are annotated to indicate their access level: plus (+) for public, minus (-) for private, and hash (#) for protected.
To the uninitiated, it may seem as though there is an infinite number of UML diagrams, but in actuality, UML standards identify 13 types of diagrams that are divided into two groups, defined below.
In UML, a relationship is a connection between model elements. A UML relationship is a type of model element that adds semantics to a model by defining the structure and behavior between model elements.
Inheritance is shown in a class diagram by using a solid line with a closed, hollow arrow. Bidirectional association: The default relationship between two classes. Both classes are aware of each other and their relationship with the other. This association is represented by a straight line between two classes.
UML Distilled is the shortest but yet explicative guide to UML (Amazon link).
You also have several UML Cheat Sheets:
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