Research on Similarity Calculation Method in Service Composition

Similarity calculation is the key to solve the question that concept matching in semantic and affects the quality of service composition, and so have strong effect on satisfaction of users. In view of inadequateness, of the current concept similarity calculation that all kinds of factors are not considered comprehensively, the paper proposed the method of internal and cross ontology concept of similarity calculation. Concept similarity calculation in ontology is based on concept tree and takes all factors including all kinds of the relations among concepts into account. Concept similarity calculation across ontology divide into concept of similarity and attribute similarity calculation, and set weights of concept and attribute similarity to obtain the last similarity. So similarity calculation is more comprehensive and accurate.