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UML 2 diagrams and guidelines

Scott Ambler has an excellent set of pages on the diagrams of UML 2.0. Each diagram has an entire page on what the diagram shows and a set of diagram guidelines. The learning priorities are right on, too. Here’s the table:




























































Diagram


Description

Learning Priority

Activity Diagram


Depicts high-level business processes, including data flow, or to model the logic of complex logic within a system.  See UML Activity diagram guidelines.

High

Class Diagram


Shows a collection of static model elements such as classes and types, their contents, and their relationships.  See UML Class diagram guidelines.

High

Communication Diagram


Shows instances of classes, their interrelationships, and the message flow between them. Communication diagrams typically focus on the structural organization of objects that send and receive messages.  Formerly called a Collaboration Diagram.  See UML Collaboration diagram guidelines.

Low

Component Diagram


Depicts the components that compose an application, system, or enterprise. The components, their interrelationships, interactions, and their public interfaces are depicted.  See UML Component diagram guidelines.

Medium

Composite Structure Diagram


Depicts the internal structure of a classifier (such as a class, component, or use case), including the interaction points of the classifier to other parts of the system.   

Low

Deployment Diagram


Shows the execution architecture of systems.  This includes nodes, either hardware or software execution environments, as well as the middleware connecting them.  See UML Deployment diagram guidelines.

Medium

Interaction Overview Diagram


A variant of an activity diagram which overviews the control flow within a system or business process.   Each node/activity within the diagram can represent another interaction diagram.   

Low

Object Diagram


Depicts objects and their relationships at a point in time, typically a special case of either a class diagram or a communication diagram. 

Low

Package Diagram


Shows how model elements are organized into packages as well as the dependencies between packages.  See Package diagram guidelines.

Low

Sequence Diagram


Models the sequential logic, in effect the time ordering of messages between classifiers.  See UML Sequence diagram guidelines.

High

State Machine Diagram


Describes the states an object or interaction may be in, as well as the transitions between states. Formerly referred to as a state diagram, state chart diagram, or a state-transition diagram.  See UML State chart diagram guidelines.

Medium

Timing Diagram


Depicts the change in state or condition of a classifier instance or role over time.  Typically used to show the change in state of an object over time in response to external events. 

Low

Use Case Diagram


Shows use cases, actors, and their interrelationships.  See UML Use case diagram guidelines.

Medium

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2 Responses to UML 2 diagrams and guidelines

  1. Dave says:

    Ah, excellent find. Thanks.

  2. Nice set of links into Scott’s work. Thanks!

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