Based on the fact that managing changes of data is the most neglected problem in the data warehouse metadata management,the paper proposes a model that is based on CWM and repository technolog...

• 跟踪每一个数据元素的生命周期,分析数据源变更时对数据仓库的影响,支持当前数据与历史数据的合并,减少了元数据提取转换和加载的开销。