TY  - JOUR
UR  - http://www.sciencedirect.com/science/article/pii/S1571066108003125
VL  - 200
SP  - 133
A1  - Lapadula, Alessandro
A1  - Pugliese, Rosario
A1  - Tiezzi, Francesco
JF  - Electronic Notes in Theoretical Computer Science
KW  - Service discovery; negotiation; service level agreement; service orchestration; process calculi
ID  - eprints414
Y1  - 2008///
AV  - public
IS  - 3
N1  - Proceedings of the 3rd International Workshop on Automated Specification and Verification of Web Systems (WWV 2007).
TI  - Service discovery and negotiation with COWS
PB  - Elsevier
N2  - To provide formal foundations to current (web) services technologies, we put forward using COWS, a process calculus for specifying, combining and analysing services, as a uniform formalism for modelling all the relevant phases of the life cycle of service-oriented applications, such as publication, discovery, negotiation, deployment and execution. In this paper, we show that constraints and operations on them can be smoothly incorporated in COWS, and propose a disciplined way to model multisets of constraints and to manipulate them through appropriate interaction protocols. Therefore, we demonstrate that also QoS requirement specifications and SLA achievements, and the phases of dynamic service discovery and negotiation can be comfortably modelled in COWS. We illustrate our approach through a scenario for a service-based web hosting provider.
SN  - 1571-0661
EP  - 154
ER  -