A Trace-Based View on Operating Guidelines

Operating guidelines have been introduced to characterize all controllers for a given service S. A controller of S is a service that interacts with S without deadlocking. An operating guideline of S can be used to decide whether S refines another service. It is a special-purpose structure to describe the behavior of service S from the perspective of its controllers rather than from the perspective of S. This paper provides a more conceptual understanding of operating guidelines from the perspective of a traditional concurrency semantics: a tracebased semantics. As benefits, we get an easier characterization of service refinement, and prove that this is a fully abstract precongruence.