1. Requirements engineering position

Traditional approaches to Information Systems (IS) engineering are based on the assumption that an IS represents a part of the world, and therefore focus on modeling the information representative of the "Universe of Discourse" that the system must make accessible. This is achieved through conceptual modeling, which consists in abstracting the conceptual specification of the IS, the conceptual schema from the analysis of the facts and events relevant to the observed reality, and about which the community of IS users needs to be informed....