~O~ | Enterprise Architect User Guide

Name	Detail	See also
Object	An entity with a well-defined boundary and identity that encapsulates state and behavior. State is represented by attributes and relationships, behavior is represented by operations, methods and StateMachines. An Object is an instance of a Class.	Class Instance
Object Diagram	A diagram that encompasses objects and their relationships at a point in time. An Object diagram can be considered as a special case of a Class diagram or Communication diagram.	Class Diagram Communication Diagram
Object Flow	A sub type of the State flow or transition. It implies the passing of an object instance between elements at run-time.
Object Flow State	A state in an Activity graph that represents the passing of an object from the output of actions in one State to the input of actions in another State.
Object Lifeline	A line in a Sequence diagram that represents the existence of an object over a period of time.	Sequence Diagram
Object Management Group (OMG)	The standards body responsible for the UML specification and management.	www.omg.org
Occurrence	A relationship that indicates that a Collaboration represents a classifier. An Occurrence connector is drawn from the collaboration to the classifier.
Operation	A service that can be requested from an object to effect behavior. An operation has a signature, which could restrict the actual parameters that are possible.

Object

An entity with a well-defined boundary and identity that encapsulates state and behavior. State is represented by attributes and relationships, behavior is represented by operations, methods and StateMachines. An Object is an instance of a Class.

Class Instance

Object Diagram

A diagram that encompasses objects and their relationships at a point in time. An Object diagram can be considered as a special case of a Class diagram or Communication diagram.

Class Diagram Communication Diagram

Object Flow

A sub type of the State flow or transition. It implies the passing of an object instance between elements at run-time.

Object Flow State

A state in an Activity graph that represents the passing of an object from the output of actions in one State to the input of actions in another State.

Object Lifeline

A line in a Sequence diagram that represents the existence of an object over a period of time.

Sequence Diagram

Object Management Group (OMG)

The standards body responsible for the UML specification and management.

www.omg.org

Occurrence

A relationship that indicates that a Collaboration represents a classifier. An Occurrence connector is drawn from the collaboration to the classifier.

Operation

A service that can be requested from an object to effect behavior. An operation has a signature, which could restrict the actual parameters that are possible.