%0 Book Section %A De Nicola, Rocco %A Ferrari, GianLuigi %A Montanari, Ugo %A Pugliese, Rosario %A Tuosto, Emilio %B Verification: Theory and Practice %D 2004 %E Dershowitz, Nachum %F eprints:318 %I Springer %P 185-187 %S Lecture Notes in Computer Science %T A Formal Basis for Reasoning on Programmable QoS %U http://eprints.imtlucca.it/318/ %V 2772 %X The explicit management of Quality of Service (QoS) of network connectivity, such as, e.g., working cost, transaction support, and security, is a key requirement for the development of the novel wide area network applications. In this paper, we introduce a foundational model for specification of QoS attributes at application level. The model handles QoS attributes as semantic constraints within a graphical calculus for mobility. In our approach QoS attributes are related to the programming abstractions and are exploited to select, configure and dynamically modify the underlying system oriented QoS mechanisms.