Jennifer Widom Stanford University A data warehousing system collects data from multiple distributed sources and stores the integrated information as materialized views in a local data warehouse.
Users then perform data analysis and mining on the warehouse views.
In many cases, the warehouse view contents alone are not sufficient for in-depth analysis. For a given view data item, identifying the exact set of base data items that produced the view data item is termed the view data lineage problem. At view definition time, our system automatically generates lineage tracing procedures and supporting auxiliary views. Inc. All rights reserved.