The Research And Application Of Metadata Interchange Technology Based On XMI

Data warehouse is a novel technology. It has brought great benefits and its importance is beingrecognized more and more. Metadata play a key role in data warehouse because it is the foundation of comprehending the operations between different tools. However, venders nowadays adopt different metadata standards and metadata management strategies, which result in much difficulty of integrating and sharing metadata in data warehouse.Aiming at such metadata problems, OMG puts forward some corresponding technical specifications. CWM is a data warehouse meta-model criterion from OMG. And XMI is a metadata interchange standard put forward by OMG. Conforming to these specifications, the thesis expounds the architecture of CWM and the XMI generation principles. Meanwhile, as the important correlation technologies, the thesis also introduces the technology of metadata and data warehouse.On the basis of studying and comprehending CWM and XMI technologies, the thesis starts the research of metadata application and metadata interchange. Firstly, by combining a data warehouse project instance, it redesigns the procedure of implementing a warehouse theme by keeping to the CWM specification. This acquires a method of designing the standard data warehouse, because warehouses based on CWM have the same meta-model. Secondly, by following the XMI generation principles, the thesis realizes a program that can convert UML models into XMI documents. Thus by running this program, it can transform meta-model data into XMI format which is a standard interchange format.