Namespaces are a powerful design feature for separating name scope, mapping modeling elements to code folders and controlling editing access to code files integrated with the design. The Java language uses the package construct during implementation to control the scope of names and group code files into separate folders. Interfaces are represented in the UML class model as stereotyped classes or with the abbreviated lollipop notation. To save development time, operations of an interface can be defined once and then automatically incorporated into any class that implements that interface. The logical class abstraction with attributes and operations is the standard design element of a class model.
Components add properties and events to represent a physical element in the software system.
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