Communication diagram

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In the Unified Modeling Language (UML) 2.0, a communication diagram is a simplified version of the UML 1.x collaboration diagram.

UML has four types of Interaction Diagrams
- Sequence Diagram
- Communication Diagram
- Interaction Overview Diagram
- Timing Diagram

A Communication diagram models the interactions between objects or parts in terms of sequenced messages. Communication diagrams represent a combination of information taken from Class, Sequence, and Use Case Diagrams describing both the static structure and dynamic behavior of a system.

However, communication diagrams use the free-form arrangement of objects and links as used in Object diagrams. In order to maintain the ordering of messages in such a free-form diagram, messages are labeled with a chronological number and placed near the link the message is sent over. Reading a communication diagram involves starting at message 1.0, and following the messages from object to object.

Its the choice of developer/architect to use either sequence diagram or communication diagram. Both serves the same purpose but with variation in ease of use

Both the kind of diagrams use similar notations.

[edit] External links

• Communication Diagram with a simple Scenario
• Introduction to UML 2 Communication Diagrams From Agile Modeling, by Scott W. Ambler
• The Communication Diagram by Francois Coetzee
• Communication Diagram (formerly Collaboration Diagram) by Sparx Systems
• UML 2 Communication Diagram Guidelines

Unified Modeling Language (UML) (category) ( view • talk • edit )
Background
Organizations: Object Management Group (OMG) • UML Partners Persons: Grady Booch • Ivar Jacobson • James Rumbaugh
Concepts
Object oriented: programming (OOP) • analysis and design (OOAD) Structure: Actor • Attribute • Class • Component • Interface • Object • Package  Behavior: Activity • Event • Message • Method • Operation • State • Use case  Relationships: Aggregation • Association • Composition • Dependency • Generalization (or Inheritance)  Extensibility: Profile • Constraint • Stereotype • Tagged values  Other concepts: Multiplicity • Role
Diagrams
Structure diagrams Class diagram • Component diagram • Composite structure diagram • Deployment diagram • Object diagram • Package diagram		Behavior diagrams Activity diagram • State Machine diagram • Use case diagram • Communication diagram • Interaction overview diagram • Sequence diagram • Timing diagram
Topics
Compared to relational database model (ERD) • Glossary of UML terms • Systems Modeling Language (SysML) • UML colors:
Role	Moment, Interval	Description	Party, place, thing
Tools(category) and Processes
List of UML tools • Rational Unified Process (RUP)