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Chapter 2 Building an Object-Oriented Model
91
Defining generalizations
A generalization relationship between classes shows that the subclass shares
the structure or behavior defined in one or more superclasses. You use a
generalize to show a "is-a" relationship between classes.
You can create a generalization only from one class to another class, or from
one interface to another interface. You can also create a generalization
between a shortcut of a class to a class, or between a shortcut of a interface to
a interface. If the link is oriented, only the parent object can be the shortcut.
You can create only one generalization between two given objects.
Generalization properties
A generalization has the following properties:
Property Description
Maximum
length
Name Name of the generalization 254
Code Reference name for the generalization 254
Comment Descriptive comment for the generalization —
Parent Class or interface to which the generalization belongs
to
254
Child Class or interface that belongs to the generalization 254
Stereotype Subclassification of a generalization derived from an
existing one. Extends the semantics of a
generalization without changing it's structure
—
Visibility Visibility of the generalization, whose value denotes
how it may be seen outside its enclosing name space
—
Virtual Used in generation (except for Java and
PowerBuilder)
—