Study Of Heterogeneous Data Exchange Technology On XML

With the rapid development of Internet and information technology in recent years, the data amount is increasing explosively which result in the wide application of database technology. However, that various differences in choosing database processing system lead to the variety of data sources forms a huge heterogeneous database circumstances, so, how to co-share those heterogeneous data is becoming a challenge to all of us. XML technology, which shows her powerful influence in data exchanging upon her birth, is becoming not only a data format standard irrespective to platform or supplier,but also overcomes those deficiencies of those traditional EDI data exchange technology ,such as inflexibility,high cost,poor interactivity.This essay set up a model on the basis of XML technology, using XML document as a carrier for data exchange, designing a changing regulation dictionary of XML format. It solves the problems as structure conflicting and meaning conflicting that come up in the exchanging process through an advanced defined exchanging rule to administrate the exchanging process.This paper study on the double-sided mapping rule between XML schema and database schema, and put forward a improved mapping method based object tree. Through this way, the mapping relationship on data structure between XML and database is set up. This method can ensure the correctness of data structure in mapping processing, and reserve the semantic information of primary keys, foreign keys, data types and default values in relationship schema.Besides this, this essay also founds the mapping regulation for two pairs, which are data of database with XML text and the data type of the database. Finally, these paper uses a vivid example realize the mapping between relational schema and XML schema.