Unified Modeling Language (UML)

Table of Contents

UML Definition

The Unified Modeling Language (UML) is a general-purpose, developmental, modeling language in the field of software engineering that is intended to provide a standard way to visualize the design of a system.

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UML Class Diagram

UML Class Diagram Tutorial

A Comprehensive UML Class Diagram tutorial written for everyone who want to learn about Class Diagram. Read this UML guide and learn UML today.

The UML Class diagram is a graphical notation used to construct and visualize object-oriented systems.

A class diagram in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system:

classes
their attributes
operations (or methods)
and the relationships among objects

Example

UML Class Notation

Class Access Modifiers

Perspectives of Class Diagram

The choice of perspective depends on how far you are in the development process. During the formulation of a domain model, for example, you would seldom move past the conceptual perspective. Analysis models will typically feature a mix of conceptual and specification perspectives. Design model development will generally start with a heavy emphasis on specification and evolve into implementation perspectives.

Perspectives:

Conceptual: represents the concepts in the domain
Specification: the focus is on the interfaces of Abstract Data Type (ADTs) in the software
Implementation: describes how classes will implement their interfaces.