Sequence Diagram Homework Clip

What is a UML Sequence Diagram?

The Sequence Diagram models the particular cooperation regarding objects based on a time sequence. That displays how a objects interact with others in a particular scenario of a use case.

Standard Sequence Diagram Symbols and also Notations

Class Roles :

Class roles illustrate how the object will behave in context. Use the UML object symbol to illustrate class roles, but don't list object attributes.

Activation :

Activation boxes represent the time an object needs to complete a task.

Messages :

A message defines a particular communication between Lifelines of an Interaction.

Lifelines :

A sequence diagram shows, as parallel vertical lines (lifelines). A lifeline represents an individual participant in the Interaction.

Destroying Objects :

Objects can be terminated early using an arrow labeled "<< destroy >>" that points to an X.

Loops :

A repetition or loop within a sequence diagram is depicted as a rectangle.

Sequence Diagram Homework Help

The UML diagram which shows the interaction of object with other object in particular scenario of use case is known as Sequence diagram. It is a form of interaction diagram which shows objects as lifelines running down the page. It models the collaboration of objects based on a time sequence. It shows as parallel vertical lines (lifeline), different processes or objects that live simultaneously, and, as horizontal arrow, the message exchanged between them.

Notations used in Sequence Diagram are as follows:

Class Role: It describe the way an object should behave in context. The uml object symbol to show class roles, but don’t list object attributes.


Activation: By this box the time taken by the object to complete a task is represented.


Messages: It is used to represent communication between objects.


Lifelines: Lifelines are vertical dashed lines that indicate the object's presence over time.


Destroying Objects: Objects can be terminated early using an arrow labeled "<< destroy >>" that points to an X.


Loops: A repetition or loop within a sequence diagram is depicted as a rectangle. Place the condition for exiting the loop at the bottom left corner in square brackets [ ].


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