UML: Sequence Diagram

Hello Friends, In this blog post on the UML sequence diagram Tutorial, I am going to teach you about UML or Sequence diagram.

Inside this blog post, we are going to discuss a few important questions related to the UML sequence diagram like

What is a sequence diagram in UML?
What is a sequence diagram explain with examples?
How do you create a sequence diagram in UML?
What are the components of the sequence diagram?
What are the 9 UML diagrams?
How do you read a sequence diagram?
How do you write a sequence diagram?
What is a sequence chart?

UML stands for Unified Modeling Language and was created by Objected Management Group.

A sequence diagram is the best way to express the whole functionality flow of your project.

It shows the connection between two or more events with the help of a flow chart diagram.

It becomes very easy to understand the classes, objects, methods, variables with the help of the flow chart diagram.

It is a great help to understand the behavior of complex applications and software systems.

what is the need for this Sequence Diagram or UML…?

  • This is the design phase of any kind of software where we make an event chart or flow charts regarding our projects so that we could easily understand and code for the software.
  • When the size of the project grows with time then it is very difficult for a new person to understand the code and functionality of the project thus this UML or flow chart or sequence diagram becomes a great help to understand the project.
  • No one usually sees the hardcore of the software so it is very important to have the design and flow chart of the software or application.

How to draw a sequence diagram…..?/ What is a sequence diagram explain with an example?/ What are the components of the sequence diagram?

You can see the example of the sequence diagram below.

seqenceimg-content


There are several available tools for designing the UML diagrams, you do not need to have any coding language to use that software.

Please check out some extensive link below for downloading the software and some additional information about the sequence diagram OR UML.

https://www.edrawsoft.com/download-edrawmax.php

http://creately.com/blog/diagrams/uml-diagram-types-examples/

http://download.cnet.com/Sequence-Diagram-Editor/3000-2383_4-10329419.html

http://staruml.io/download

https://sequence-diagram-editor.en.softonic.com/

http://www.sparxsystems.com/products/ea/index.html

https://www.edrawsoft.com/uml/index.php

Quick Q&A:

What is a sequence diagram in UML?/ What is a sequence diagram explain with an example?

The sequence diagram is just a representation, documentation, image of any work, project, existing work, and project to analyze and to dictate the working of several objects together.

In another word, it is a diagram which represents a process flow, workflow for any desired application, project, or for any existing work. Generally, these sequence diagrams are used in software development and by business professionals to represent the process workflow on paper or in the documentation.

What are the components of the sequence diagram?

The component of the sequence diagram is given below:

Class Roles or Participants: Class roles describe the way an object will behave in the context

Activation or Execution Occurrence: Activation boxes represent the time an object needs to complete a task

Messages: these are the arrows that represent the communication between the objects.

Lifelines: vertical dashed line that shows the presence of objects over time.

Destroying Objects: object can be terminated simply by showing the arrow labeled << >>

Loops: A repetition and a loop in the sequence diagram is shown by the rectangle box.

Synchronous Message: It requires a response before the interaction can be continued.

Asynchronous Message: It does not need a reply for the interaction to continue.

Reply or return message: A reply message is shown with a dotted line with an arrowhead pointing back to the original lifeline.

self message: a message object sends itself.

Create a message: This is the message that creates a new object.

delete a message: This is the message that destroys an object.

found message: a message sent from an unknown recipient.

lost message: A message is sent to an unknown recipient.

What are the 9 UML diagrams?

The UML diagrams are given below:

Structural UML diagrams
  • Class diagram
  • Package diagram
  • Object diagram
  • Component diagram
  • Composite structure diagram
  • Deployment diagram
Behavioral UML diagrams
  • Activity diagram
  • Sequence diagram
  • Use case diagram
  • State diagram
  • Communication diagram
  • Interaction overview diagram
  • Timing diagram

Conclusion:

UML diagram is the fact that visuals always have more impact than the theory of verbal knowledge. So it is very simple to understand and visualize the working, functioning of any application, program, process with the help of the UML sequence diagram. Here in the UML sequence diagram, you can visualize the architecture of any application, process, a system with the help of the UML diagram. Within this blog, you have learned How to draw a sequence diagram.

Within this blog post, we have discussed and explored a few important questions related to UML sequence diagram like What is a sequence diagram in UML, What is a sequence diagram explain with examples, How do you create a sequence diagram in UML, What are the components of the sequence diagram, What are the 9 UML diagrams, How do you read a sequence diagram, How do you write a sequence diagram, What is a sequence chart.

For any query please feel free to write to us at [email protected].

Hope! You would have liked this blog post-UML: Sequence Diagram!

Have a great time! Sayonara!

Anurag

I am a blogger by passion, a software engineer by profession, a singer by consideration and rest of things that I do is for my destination.