Heterogeneous Sources Of Information Integration Technology Research

The Digital Time is meant to digitalize all kinds of information , and the information propagated broadly through information sharing and information transportation. The purpose of Heterogeneous Information Integrating System research is to integrate all kinds of digital information on the network, and provides more complicated digital information and more convenient, quick and intelligent services to users. It is a very important subject deserving of a deep study.In this thesis, the Heterogeneous Information Integrating System Architecture is studied in general, and on the basis of the popular model languages such as OEM and XML, a kind of information schema language called Self-defined Schema Language(SSL) is proposed. The key techniques in the querying and information fusion process in mediators, and the implementing mechanism of querying and information integrating in wrappers are detailed in the thesis. Several extensions to existing designs are also presented: extension to providing wrapper function rules, extension to some mechanisms of object communication protocol in Heterogeneous Information Integrating System; and extension to some query services. The implementation issues of triggered query are discussed, and the key techniques in triggered query management and communication mechanism extension are given in the thesis.