Please enable JavaScript.

Coggle requires JavaScript to display documents.

05_Class Diagram (Essential elements (Class (Primary Key (Not 2 obj…

- - - - Not 2 obj identify with the value of primary key's attributes
      - Unique identifier of a class
      - different from null values
    - - association between classes
  - - - Logical connection between classes
      - cardinality of association
        
        The cardinality indicates the number of instances of a class that can be associated to single instances of the other class
        
        implementation of the system, 1-1, 1-many or many-many
        
        cardinality notations
      - roles
      - Generalization
        
        IS-A relationship
        
        Inheritance tra subclass and superclass
      - Aggregation
        
        is a part of
        
        composition
        
        the aggregate is the only owner of its part
        
        part can belong to only one aggregate
        
        the life of the part depends on the life of the aggregate
    - - a class can use an other class