Metadata Propagation in Large, Multi-Layer Database Systems A. Rosenthal and E. Sciore   View Paper (PDF)   Return to Internet, Performance, and Systems Management Abstract The problem that exists is large database systems (e.g., federations, warehouses) have several virtual or physical databases, each derived from other layers. Today, metadata tend to be locked into the schema where it is supplied, and are rarely available through other schemas. Services for negotiating about metadata values (or data values) among autonomous administrators, e.g., what-if analyses, suggesting changes Algorithmics: wizards to implicitly enumerate a large set of queries equivalent to a view definition. DiSC'01 Copyright ©2002 ACM Inc.