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Graphics Interchange Format  |  1998-02-10  |  41.2 KB  |  368x319  |  4-bit (16 colors)
   ocr: IREIRRESPNEMHGNEZUG End users - Extemnal level Extemal viewi :0 External viewn Externa/conceptual mapping Conceptual level Conceptuar schema Conceptual/internal mapping nternal level Stored database Figure 1.The three-schema architecture developed by ANSI/SPARCIS still the accepted odel for data independence tF the enterprise.