In the process of enterprise informatization construction, owing to periodicity, technicality, social factor and economic factor of application system implement, enterprises have accumulated a lot of business information which are processed or stored by different techniques; information application systems themselves are quite different. Although all these disperse different business systems can meet respective business information storage and management requirement, there is no unified information interface between any two systems, and information can not be shared by using a unified standards and norms. Therefore, it is very necessary to integrate all information sources on a unified information platform.