Object - Class Diagram (UML)

Card Puncher Data Processing


A class diagram is a diagram specified in the UML standard by showing:

By comparison with a classic entity relationship model, it adds the behaviors (ie method) of each entity to the model.


Object - Relationship

Classes Relationship


Documentation / Reference

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1..*1Professor+ listOfStudents : listClass+ Students : list
Class - Aggregation Relationship

aggregation relationship in code. Library and Students. Because the student can exist without library, the relation between student and library is aggregation. professor and students: when the...
1..*1Professor+ listOfStudents : listClass+ Students : list
Logical Data Modeling - Aggregation (Collection)

aggregation is a containment relationship where one or more entities are part of a container entity. In other word, aggregation is combining multiple pieces of data into one unit. The container entity...
Association Entity Example
Logical Data Modeling - Association

An association is a relationship between two or more entities. It's represented by a link in the data model. An association: answers to the question why two entity need to know one another. specifies...
Uml Composite Aggregation
Logical Data Modeling - Composition Relationship

composition is a containment relationship of physical type where the content entity is a part of a container entity This relationship is also known as: a whole/part relationship (ie whole/component)...
Entity Set Graph Model
Logical Data Modeling - Visualization / Language

Data Modeling Language helps visualize data model. - The ERD is the most common technique for drawing data models. (UML) - The class diagrams adds the behaviours of each entity to the model....
Uml Qualified Association Bank
Object - Association relationship (link)

An Association is just the link on a class diagram that represents visually a relationship. Bank: Given a Bank, a particular accountNo identifies zero or one Person where: the qualifier is the...
Card Puncher Data Processing
Object - Data Modeling Visualization

Data Modeling Visualization in an object where: a class represents a entity set and an object a a entity that have relationship.
Card Puncher Data Processing
Object - Object Data Model

An object model is a data model where: object are entity class are entity_set relationship can be structural (data) or behavioral (method)
Cardinality Representation Erd
Relational Data Modeling - Entity-Relationship Diagram (ERD)

The entity-relationship (E-R) diagram is a diagram that helps visualize relational data models and shows relationships between relation (ie the entities) ER modeling technique was first developed by Peter...
Data System Architecture
Unified Modeling Language (UML)

An UML depicts a system and how entity interact with each other. UML is a collection of tools for analysis, design, and modeling software-based systems and/of processes UML 2 has many types of...

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