【摘要】 元数据在数据仓库系统中占据着十分重要的地位,其中存放着许多重要的信息,尤其是对于数据仓库的ETL过程,可以说是ETL的指挥中心。提出了以CWM元数据模型标准为基础来开发标准的ETL的设计思想,并描述了具体的开发步骤。更多还原

【Abstract】 Metadata plays a very important role in the data warehouse system.It stores many important informations about the data warehouse,especially about the ETL(Etract-Transform-Load) process.Therefore it’s appropriate to take the metadata as the control center of the ETL process.After an analysis of the common warehouse metamodel, we propose a method to design a standard ETL process on the base of the common warehouse metamodel and describe the steps to realize it.更多还原