Aspects + GAMMA = AspectGAMMA A Formal Framework for Aspect-Oriented Speci cation

This paper describes an extension to the GAMMA formalism, which we name AspectGAMMA, and we show how non-computational aspects can be expressed separately from the computation in this framework. Examples of such aspects include real-time constraints, location/distribution aspects, behavioral requirement aspects, fault-tolerance aspects, power requirement aspects, and many others. The idea is to abstract the emerging idea of aspect-oriented programming (AOP) into a formal framework, thereby facilitating speci cationdriven design, enabling formal validation, and design reuse at the requirement speci cation level. The main goal of this position paper is to outline the way towards a formal foundation of aspect-oriented speci cation and re nement towards implementation.