Software Engineering UML DIAGRAM -SEQUENCE DIAGRAM -PART 1

This is a video for beginners regarding the UML BEHAVIORAL DIAGRAM
SEQUENCE DIAGRAMS
Sequence Diagrams Definition
Basic Concepts
Notation
A sequence diagram is an UML diagram that shows interaction between objects arranged in a time sequence manner.
Used in analysis to show interaction between an actor and the system
Their usefulness comes in design, where they are used to depict the collaboration between objects and to specify the message signatures;
There are four basic steps to perform when drawing
sequence diagrams:
If a CASE tool allows, copy the text of the given use case from the use case narrative and paste it to the left margin of the page.
Add actors
Add boundary and entity objects identified in the use case narrative.
Add the use case controller object, which we will called the use case handler. Its purpose is to handle the entire communication between boundary and entity objects.
We might have some other control objects in a sequence diagram, if needed.

Disclaimer:
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