Schema mapping with quality assurance for data integration

With the popularity of the internet, more and more data are generated on internet. Because of the usability of Extensible Markup Language(XML for short), more data is organized by XML document format. Because of the flexibility of XML, data organized by XML have a variety of organizational formats which brings a lot of inconvenience to data management. In particular, when the large-scale data operations are performed on XML data, for example data integration, model change, and so on, there are many problems. One of the current implementations is to use Data Exchange to carry out the above operations. The works of predecessors mainly are to analyze the characteristics of Schema Mapping on XML, and institute Data Exchange rules. These rules only consider the data integrity, reliability, but don't consider the quality of the data after conversion. This paper proposes the concept of quality assurance mechanisms. Firstly we discuss that a new model with quality assurance, and provide a suitable method for this model. Then we propose the strategy of weak branch's convergence on the basis of Schema. In the end theoretical analysis and experimental results show that the method is correct and feasible.