In the current, registration and discovery interface for Web services are only based on the functional description. They cannot implement Web services registration and discovery with QoS properties. Thus, this paper proposes a PFS model for Web services supporting QoS properties. A QoS Broker module is introduced to implement Web services registration, discovery, selection and QoS information management. QoS Broker can act as a trustworthy third party that implements QoS monitoring and evaluation during the process of Web services, and updates the service QoS information by means of the latest...
