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Research On Auto-Mapping Of Data Model Based On Ontology

Posted on:2011-08-12Degree:MasterType:Thesis
Country:ChinaCandidate:C B ShiFull Text:PDF
GTID:2178360305478205Subject:Computer software and theory
Abstract/Summary:PDF Full Text Request
Data integration is the study hotspot in recent years.The purpose of data integration is to maximise shield of the data heterogeneity and the data distributivity, to provide users with unified access mode, to realize the information sharing between heterogeneous data sources. In data integration, the semantic divarication for the data inconsistency or the different interpretation of the same data, affect the quality and efficiency of the data mapping in the data exchange, so it is difficult to achieve the data integration. Therefore, solving the semantic heterogeneity of data has been a challenge, also is the present research hotspot.This paper studys heterogeneous data integration theory and technology, and analyses and compares the existing data integration methods, using the data element combined with ontology technology method, puts forward a data model automatic mapping method based on ontology. This method uses the mature XML technology, and the data element standardity and the superiority of precise semantic ontology description, solve the semantic heterogeneity in data integration.(1)The data element semantic description Specification based on ontology. Under the guidance of the concept of ontology, according to the existing data element semantic description method, with XML technology, this paper proposes the data element semantic description Specification.(2)The data model semantic description method based on the data element. On the basis of data element semantic description ,this paper proposes the semantic method of describing data item, data sheet and data model, and formulates semantic descriping specifications of data model .(3)The automatic mapping algorithm between data models. According to semantic of the data model calculation , using the semantic similarity method of ontology,it automaticly calculates two data model congruent relationship between relation sheets, between data items, and formulates the mapping description specification between models.Finally, the paper studys the realization fact for the prototype system, including the application of key technologies and systems design. Through the experimental data it shows that this method is feasible and effective.
Keywords/Search Tags:data integration, the semantic heterogeneity, ontology, data element, data mapping
PDF Full Text Request
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