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Define package. Explain the package diagram with suitable diagram. OR What are package diagrams and why are they used ?

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By By Team EasyExamNotes

A package in software engineering is a way to organize and group related elements, such as classes, associations, generalizations, and even other packages, into a cohesive unit with a common theme. Think of it like a folder that helps organize files on your computer. The package diagram is a type of structural diagram that visually represents how these packages are organized and interact within a system.

  1. Definition of Package: A package is like a folder that holds related elements in a software system, such as classes or other packages.
  1. Purpose of Package Diagram:
    • Package diagrams are structural diagrams that show how different parts (packages) of a software system are organized and connected.
  2. Notation for Package:
    • In a diagram, a package is represented as a box with a tab. The tab is like the folder tab, indicating the contents inside, making it a visual representation similar to a tabbed folder.
  3. Organization of Packages:
    • Packages form a tree structure, where they are organized hierarchically. The top-level package is like the root of the tree, representing the application itself.
  4. Uses of Package Diagram:
    • Structuring High-Level System Elements:
      • Package diagrams help in organizing and structuring high-level elements of a system.
    • Organizing Large Systems:
      • They are particularly useful for organizing large systems by grouping related elements together, making the system more manageable.
    • Simplifying Class Diagrams:
      • Package diagrams simplify complex class diagrams by grouping classes into packages, providing a higher-level view of the system’s organization.
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