Abstract

specification of the translation, with an executable version in Maude, meets the need for unambiguous CAPSL semantics. There are areas still under development, especially surrounding the specification and semantics of goals. Due to the experimental activity, design choices are constantly being reexamined and debated. Two are discussed further here: invertibility and session identifiers. Invertibility Generality is an important goal for CAPSL. The "invertible" relation brings us closer to this goal by making it possible to axiomatize the invertibility properties of new operators. We think it is a reasonable task for specifiers to include this property for operators they define, but we also have considered whether invertibility properties can be inferred from the functional axioms. For example, the axiom sd(K, se(K, X)) = X in the symmetric key typespec implies an invertibility relation for se. In the future, we might be able to recognize opportunities like this so that the analyst w...

Citations