A role is a participant in an interaction or a process. It can be the initiator, that is the requester of a service, or it can represent a sub-contractor carrying out processing outside the service.

A role is an integral part of the object that it describes, and is not reusable. It can subsequently be assigned to an org-unit internal or external to the organization or to an IT component. Examples: Requester, Traveler.

HOPEX IT Architecture, HOPEX NAF, HOPEX Business Process Analysis, HOPEX IT Architecture V2, HOPEX DoDAF V2.

Application Architecture Diagram, Application Environment Diagram, Application Internal Architecture Diagram, Interaction Definition Diagram, Overview of Applications, Overview of Process Categories, Service Architecture Diagram.