Casl - Ltl A Casl EXTENSION FOR DYNAMIC SYSTEMS

Casl the basic language developed within CoFI, the Common Framework Initiative for algebraic specification and development, cannot be used for specifying the requirements and the design of dynamic software systems. Casl-Ltl is an extension to overcome this limit, allowing to specify dynamic system by modelling them by means of labelled transition systems and by expressing their properties with temporal formu-lae. It is based on LTL, the Labelled Transition Logic, that is a logic-algebraic formalism for the specification of dynamic systems, mainly developed by E.Astesiano and G. Reggio (see [AR01] and [CR97]). This document gives a detailed summary of the syntax and intended semantics of Casl-Ltl. It is intended for readers who are already familiar with Casl ([Mos03]). Four short examples are given in the appendix, and extended case studies using Casl-Ltl are given in [CR00, CR03]. An extensive companion user method is given in [CR03] (while [CR00] gives a first attempt to rely on structuring concepts). Casl-Ltl was also used to present the semantics of some parts of UML in [RACH00, RCA01].