Yingwei Cui Jennifer Widom Lineage tracing for general data warehouse transformations. 41-58 2003 12 VLDB J. 1 http://springerlink.metapress.com/openurl.asp?genre=article&issn=1066-8888&volume=12&issue=1&spage=41 db/journals/vldb/vldb12.html#CuiW03