Headquarter location: defines geographically where the elements of the enterprise are deployed (organization units, hardware devices, actors, etc.)

Site location: defines geographically where the elements of the enterprise are deployed (organization units, hardware devices, actors, etc.). Generally, an enterprise has one headquarter and several sites.

Server device: Represents a hardware platform, that can be connected to other devices, and on which are deployed application components.

Workstation: Workstation are connected via network links to the IS. Application components can be deployed there.

Application: This Application component corresponds to legacy applications, off the shelf products, or can be an assembly of application components.

Interaction application component: Represents the top level components that manage the interaction with the external of the IS. In most cases, it is a GUI component, such as here a web interface.

Association between two classes: An association has a name, and provide at each end the role name, and the cardinalities (possible number of occurrences) of related elements.