SAVCBS 2001 Proceedings: Specification and Verification of Component-Based Systems, Workshop at OOPSLA 2001

The goal of this workshop was to explore how formal (i.e., mathematical) techniques can be or should be used to establish a suitable foundation for specification and verification of component-based systems. Component-based systems are a growing concern for the object-oriented community. Specification and reasoning techniques are urgently needed to permit composition of systems from components, for which source code is unavailable. This report is the proceedings of the worksho

Requirements Specification of an Automotive System with Hybrid Sequence Charts

In this position statement we outline the key ideas behind Hybrid Sequence Charts (HySCs) along an example system taken from the automotive industry. HySCs are a visual description technique for communication in hybrid systems inspired by the well known Message Sequence Charts syntax. However, they have a completely different semantic model that is well suited for the application domain of hybrid systems. As modeling example we consider a scenario taken from the specification of an electronic height control system, which is used to adjust the chassis level of a car. HySCs can be advantageously used in the early phases of the system development process. In particular, in the requirements capture phase they can help to improve the dialog between customers and application experts. HySCs complement existing formalisms like hybrid automata by focusing on the interaction between the system's components. A detailed presentation of HySCs together with their formal semantics is giv..