Multiplicity

"How to show Multiplicity on a class diagram" ( http://bit.ly/cE3P7s )

Star UML

Star UML is a free UML modelling program. You can download it here:

"StarUML - The Open Source UML/MDA Platform" ( http://bit.ly/b43TLS )

What is a Class Diagram?

A class diagram is the format used to design reusable objects. It is a description of the class only. A class diagram does not include any implementation details - in other words, it does not include code; which is language specific. It is up to the developer to make the class work.

From a class diagram, a developer/programmer can create the class in just about any language. From there, the class may be used to create many objects in a computer program.

Class Diagram

 From http://en.wikipedia.org/wiki/Class_diagram

"In software engineering, a class diagram in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, and the relationships between the classes."

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