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Graphics Interchange Format  |  1998-02-10  |  41.6 KB  |  440x311  |  4-bit (16 colors)
   ocr: User Interface Database FederatedDEMS Directory andSchema Global Database. Schema Library Global Query Processor. commonDataDaseinterface.cateway Layer: localqueries Local Querex Locall Qperies DBMSHT DBMSHZ DBMSHN FIGURE 1. Heterogeneous database-onented, system:federated database: