QoS measurement issues with DAML-QoS ontology

With the industry´s efforts in promoting the use of Web services, a huge number of Web services are being developed for the Web. To improve the service provider´s competition advantage, it is necessary to support QoS-aware service discovery mechanism as well as the corresponding measurement system. In this paper we present a QoS measurement framework based on the DAML-QoS ontology, together with the measurement code generator. The DAML-QoS ontology is designed to specify QoS constraints for Web services. It works as a complement to DAML-S to provide QoS-aware service discovery. This paper focuses on its measurement framework to check the service provider´s runtime compliance with the advertised service level. The code generator helps to generate the measurement code according to the DAML-QoS specification. This ontology level specification tries to reduce the service´s integration complexity and achieve better interoperability, automation and extensibility