Research And Realization Of Web Service Matching Mechanism Based On Ontology

The main purpose of web service is setting up a universal technology layer on the base of the current heterogeneous platforms, which is not related to the platform and language, and the applications on these diverse platforms use the layer to realize the mutual connection and integration. In order to make the computer system employ the services supplied by Web applications, the research on semantic-based web service discovery has become the hot topic in Web Service field.Semantic Web is the expansion of the current Web, which lets the semantics of the information express in the formalized way and makes the service providers and the service users in the respective organization able to conformably describe and understand the services. Accordingly, the computer can automatically analyze the meanings of web service, and further realize the composition of web services to meet the requirements of the clients. Since Semantics come up, Ontology has become to be an important tool in the artificial intelligence and knowledge engineering gradually, which plays a significant role in knowledge acquirement, expression, analysis and application, and so on. Information sharing age has transferred into signification sharing age since ontology was applied in web service field.In this thesis, ontology-based semantic web service and service matching arithmetic were studied. The works include:1) Describe services with OWL-S—the web wervice description language, the hospital enquiry ontology as an example, and the building process of the hospital enquiry ontology is introduced.2) By using the domain ontology, the service matching arithmetic is improved and a service matching model based on the conception difference is proposed, which includes the service category matching, input matching and output matching. This service matching model can combine the description logic and fully use the logic reasoning ability of ontology to discover the service.3) According to the set-up ontology and the improved arithmetic, examinations are conducted and show:the service matching model based on the conception difference dose not only exert the powerful reasoning ability of description logic and OWL fully, but also has the better performance than the methods which only adopt smilarity-sased calculation.