121 XSSD: A Fast Hybrid Semantic Web Services Discovery Method

By introducing semantics to Web Services description, the precision ratio and the recall ratio of service discovery are greatly improved. But at the same time, the services query time is also increased by executing semantic reasoning. To shorten the service query time, this paper presents a preprocessing mechanism and a fast hybrid matching algorithm based on this mechanism which can retrieve services in an accurate and quick way. All the semantic reasoning will be pretreated in the service publishing phase, and only numerical calculation will be executed to get the matching results when querying services. A prototype named XSSD has been implemented and the experiment shows that our method outperforms existing methods.