National Technical University of Ukraine
Today, changeable requirements to modern web-oriented services demand their fast development and constant reengineering. This is realized via dynamic composition of services, allowing estimating changes of both functional and nonfunctional service parameters. The last ones are considered using web services agreement technique. Nevertheless, state-of-the-art SLA-aware methods are not able to consider all classes of non-functional parameters. They also don't provide service run-time support and dynamic reconfiguration. The novel approach to dynamic web services composition, extending SLA with QoS ontology, is described in the paper.