UML Package Diagram

Package Diagram depicts how a system is split up into logical groupings by showing the dependencies among these groupings. As a package is typically thought of as a directory, package diagrams provide a logical hierarchical decomposition of a system. Packages are usually organized to maximize internal coherence within each package and to minimize external coupling among packages. With these guidelines in place, the packages are good management elements. Each package can be assigned to an individual or team, and the dependencies among them indicate the required development order.
The following is an example of a package diagram.

Figure uml.12 an example of a UML Package Diagram

Package Diagrams are often used to view dependencies among packages. Since a package can break if another package on which it depends changes, understanding dependencies between packages is vital to the stability of your software. Packages can organize almost any UML element not just classes. For example, packages are also commonly used to group use cases.
Package Diagrams also used to reflect the organization of packages and their elements. When used to represent class elements package diagrams are used to provide a visualization of the namespaces. The most common uses for Package diagrams is to use them to organize Use-Case Diagrams and Class diagrams, although the use of Package Diagrams is not limited to these UML elements.

UML Package Diagram

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