We propose an automatic transformation of Focal specifications to UML class diagrams. The main motivation for this work lies within the framework of the EDEMOI project, which aims to integrate and apply several requirements engineering and formal methods techniques to analyze regulations in the domain of airport security. The idea is to provide a graphical documentation of formal models for developers, and in the long-term, for certification authorities. The transformation is formally described and an implementation has been designed. We also provide a concrete example coming from the EDEMOI project.

We present the validation of regulations intended to ensure airport security in the framework of civil aviation. In particular, we describe the proofs of correctness/completeness for two standards, one at the international level and the other at the European level, and we show how the properties of the European level refines those of the international level. These models are expressed using the Focal environment, an object-oriented specification and proof system, and the proofs described by means of a declarative-like language are processed by the automated theorem prover Zenon. We show how Zenon appears quite appropriate when dealing with abstract specifications like our case study, but also how it should be controlled to present readable proofs.