Common Warehouse Metamodel-based Metadata Management And Realization

Most of the enterprises use the different data warehouse systems, and the warehouse systems's inner description, named metadata, is very different. So, the heterogeneous warehouse systems have the big problem of understanding. In order to deal the problem, we need a standard can describe the warehouse systems's inner thing normally.The thesis uses the OMG's CWM standard. The main purpose of CWM is to enable easy interchange of warehouse and business intelli -gence metadata between warehouse tools, warehouse platforms and ware -house metadata repositories in distributed heterogeneous environment. CWM is made for warehouse only, so it is better than Microsoft's OIM standard.The thesis stores warehouse's metadata with uniform format, and manages it nomally by using CWM. And then we can share the metadata and make it easy interchange. The thesis proposes the metadata manage -ment strategy based on CWM and system's scheme after dissecting CWM deeply and analyzing the requirement of metadata management, and then developes the prototype system named MetaManagement. The MetaManagement applies the "Object Relational Mapping" technology to establish the MetaStore database based on the relational database, and resolves the mapping problem about CWM's classes, associations and heirships. The MetaManagement develops the metadata's modeling tool based on the CWM by integrating the graphical element and modeling element in order to support the visualization of modeling and collect the metadata. The MetaManagement makes use of the XMI's XML Docu -ment production rules, and defines the conversion rules from CWM's metamodel into XMI's XML Document, and gives the three main algo...