数字图书馆环境下ETL系统的设计与实现

Design and Realization of ETL System on Digital Library Environment

ETL需要识别各种异构数据,依据这一需求,设计一种新的数据模型,用以描述并支持所有数据源,并对数据源及目标数据库之间的映射关系的建立进行分析。在此基础之上,对ETL的核心内容——数据源的接入及数据抽取给出具体的实现方法。

ETL needs to distinguish each kind of data, so the paper designs one kind of new data model to describe and support all data source, and analyzes the mapping relation between the data source and the goal database. Al- so the paper introduces the realization method about ETL core content data source access and the data extract.