Research On Technology Of Schema Matching Between Global Schema And Local Schema

With the development of network technology, the environment of information processing will consist of vast networks of large scale, heterogeneous, autonomous and distributed computing resource in the future. Various data result in various methods for accessing it, which makes it difficult for information sharing. So it is necessary to study a unity accessing method and form for vast networks of large scale, heterogeneous and distributed computing resource which is data integration's work. Schema matching is a basic problem in the field of data integration, the main aspect of it concerns a match between global schema and local schema. It must face complicated semantic and structure conflicts in the process of schema matching. Though many researches have been done on the methods of schema matching, they can't solve these problems very well. In this paper we propose solutions to solve these conflicts and integrate the schemas into a unified one. In summary, the main contribution of this paper is as follows:(1) Analyze the process of schema matching and match strategy, summarize the methods of schema matching.(2) Design a schema matching method based on semantic, investigate the problem of semantic conflict in schema matching. We classify the possible semantic conflicts between heterogeneous schemas and introduce the solution methods respectively.(3) Investigate the problem of structure conflicts in schema matching. We classify the possible structure conflicts between heterogeneous schemas and introduce the solution methods. In the end, we accomplish the transformation for these types of structural conflict and finally integrate them into a unified one.