This Package Diagram Sample depicts the structure of the designed system at the package level. A package diagram typically includes the following elements: package, packageable element, dependency, element import, package import, and package merge. A model diagram is a UML auxiliary structure diagram that depicts an abstraction or a specific view of a system to describe the system's architectural, logical, or behavioral aspects. It could display the architecture of a multi-layered (also known as multi-tiered) application - a multi-layered application model.
