Research On Integrated Technology Of Semi-structured Data

Recent years,with the high speed development of Internet and Electronic Commerce,the information quantity based WEB and the Office System have grown rapidly.These data have indefinite subclasses and attributes,contain complex data types and quotation relations(for example WEB,all kinds of documents, etc).These data are called semi-structured data.Nowadays,how to integrate the semi-structured data and the traditional structured data is a hot topic.And how to implement mutual change between these two kinds of data,integrate the models of semi-structured data and structured data is a key problem.Because of the lack of research in this area,this article put forwards an integration of semi-structured data based on XML technology:intergrating semi-structured data by the use of XML as a middleware. Integration of semi-structured data is divided into two relatively independent and interrelated components. The one is model establishment of semi-structured data.And the other is mapping between semi-structured data and structured data.Model establishment of semi-structured data is responsible for the standardization of semi-structured data,extraction of data pattern.Mapping between semi-structured data and structured data is responsible for the exchange of extracted model and structured data model through a mapping algorithm.Firstly,the article has analyzed the structure of semi-structured data and the technology of XML.And propose a method of standardizing semi-structured data.Secondly,elaborate the relation of XML and RDB,and how to establish transformation mechanism between them.Finally,elaborate on how to apply the theory by definiting three models:RT,DMM,MT.And it's based on a actual project.With the gradual advance and rapid expansion of information ,the requirements of integrate various data will more and more urgent.The article's title comes from actual project,and therefore has an important theoretical and practical value.