%S Lecture Notes in Computer Science %B Verification: Theory and Practice %T A Formal Basis for Reasoning on Programmable QoS %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. %R 10.1007/978-3-540-39910-0_21 %P 185-187 %I Springer %V 2772 %D 2004 %L eprints318 %E Nachum Dershowitz %A Rocco De Nicola %A GianLuigi Ferrari %A Ugo Montanari %A Rosario Pugliese %A Emilio Tuosto