Communication diagram

Short description: Component of the Unified Modeling Language

Real life system design sample with the Communication diagram of UML Generic sample of a Communication diagram UML diagram types

Structural UML diagrams

* Class diagram
* Component diagram
* Composite structure diagram
* Deployment diagram
* Object diagram
* Package diagram
* Profile diagram

Behavioral UML diagrams

* Activity diagram
* Communication diagram
* Interaction overview diagram
* Sequence diagram
* State diagram
* Timing diagram
* Use case diagram

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See also: Social:Models of communication

A communication diagram[1] in Unified Modeling Language (UML) 2.5.1 is a simplified version of the UML 1.x collaboration diagram.[2]

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.

Communication diagrams show much of the same information as sequence diagrams, but because of how the information is presented, some of it is easier to find in one diagram than the other. Communication diagrams show which elements each one interacts with better, but sequence diagrams show the order in which the interactions take place more clearly.

## See also

* Data flow diagram

## References

1. ↑ "Communication Diagrams". Unified Modeling Language 2.5.1. OMG Document Number formal/2017-12-05. Object Management Group Standards Development Organization (OMG SDO). December 2017. p. 599. https://www.omg.org/spec/UML/2.5.1/PDF.
2. ↑ Fowler, Martin (2004), UML distilled: a brief guide to the standard object modeling language (3 ed.), Addison-Wesley, p. 131, ISBN 978-0-321-19368-1

## External links

* Communication Diagrams in UML 2

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Unified Modeling Language

Actors|

* Organizations
* Object Management Group
* UML Partners
* Persons
* Grady Booch
* Ivar Jacobson
* James Rumbaugh

Concepts|

| Object oriented|

* Object-oriented programming
* Object-oriented analysis and design
* Object-oriented modeling

|

Structure|

* Actor
* Attribute
* Artifact
* Class
* Component
* Interface
* Object
* Package
* Profile diagram

Behavior|

* Activity
* Event
* Message
* Method
* State
* Use case

Relationships|

* Association
* Composition
* Dependency
* Generalization (or Inheritance)

Extensibility|

* Profile
* Stereotype

Other|

* Multiplicity

Diagrams|

| Structure|

* Class
* Component
* Composite structure
* Deployment
* Object
* Package

|

Behaviour|

* Activity
* State Machine
* Use case

Interaction|

* Communications
* Sequence
* Interaction overview
* Timing

Derived languages|

* Systems Modeling Language (SysML)
* UML eXchange Format (UXF)
* XML Metadata Interchange (XMI)
* Executable UML (xUML)

Other topics|

* Glossary of UML terms
* Rational Unified Process
* List of Unified Modeling Language tools
* Object Modeling in Color

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