The generalization of class Classifier The generalization of class

Classifiers represent nouns Classes Objects But also non-CS objects Organizations People

Symbol A simple rectangle with a name A partitioned rectangle

Classifier Names Simple - myClass Path – java::awt::Rectangle Name in italics means Abstract

Name Attributes Operations Additional Partitions Responsibilities Exceptions

Attribute Syntax [visibility] name [multiplicity] [: type] [= initial value] [{property string}] Visibility Public “+”, Private “-”, protected “#” Multiplicity “[0..1]”, “[1..*]” Class Attribute (e.g. static) is underlined Properties: “frozen”, “addOnly”

Operation Syntax [visibility] name [(parameter-list)] [: type] [= initial value] [{property string}] Parameter-list items: [direction] name :type [= default value] Directions is “in”, “out”, “inout” Properties “isQuery”, “sequential”, “guarded”, “concurrent”

Stereotyping <<interface>> RsClient

Relationships with Classifiers <<interface>> Generalization Association (navigation) Realization

Associations Mult. Mult. Role Role Directionality with an arrow Composition (when solid) Aggregation

Dependency <<interface>>

Kinds of Dependency (Stereotypes) Friend instanceOf Use Include Extend Call

Classifiers Appear in many of the nine diagrams Syntax shown here is also extend in consistent ways to other diagrams and symbols