Abstract: Increasingly,application developers seek the ability to search for existing Web services within large Internet based repositories. The goal is to retrieve services that match the user's requirements in a fast and efficient way. It is necessary to explore an approach of service semantic relationship discovery to enhance search engine results with a list of related services for each hit. In this paper, an effective approach for service semantic relationship discovery based on the hierarchical structure was presented. Hierarchical structure is adjusted by moving related services together according to the relevance between scrvices,and the relationships between services can be discovered gradually. Experimental resups demonstrate the feasibility and effectiveness of the approach.

Key words: Hierarchical structure, Semantic relationship, Web service, Relationship discovery