Adding Semantics to QoS Requirements

To lead the software-service revolution and to make real the promise of Business to Business interac- tions, QoS and Semantics play key roles in every phase of Web processes’ life-cycle. Ontology-based approaches for specifying QoS enable machines to reason autonomously and dynamically on QoS knowledge, aiding the development of open and large-scale distributed applications. This chapter pres- ents the impact of Semantics for the management of QoS Requirements in Service-based Applications, focusing on the onQoS ontology, its role for specifying service requirements and to support queries for service discovery through the onQoS-QL language. The introduced concepts and the results presented in the chapter pave the way to new technology horizons where the semantics could represent the global glue for Web processes.