Conceptual correlation-based method for grid service composition
Wei Liu · Journal of Tsinghua University(Science and Technology) · 2007
The performance of automatic service composition in the grid is improved by a domain ontology based two-phase method(TPM).The method first clusters functional similar grid services into one abstract service class using cluster rules,and the service classes are composited based on their conceptual correlations.Then the system replaces the composite service classes by selected grid services.With the conceptual correlations between service classes defined using domain ontology,the composition of service classes is transformed to a shortest path problem on the service composition graph constructed based on the correlations.A composition algorithm completes the process using Dijkstra search with a simple service selection strategy.Finally,comparisons of the efficiency,satisfaction,and QoS shows that the method is more efficient and scalable than other methods and provides better QoS.