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DATA SOURCES • operational systems • transactional systems DATA ACQUISITION • extraction • transformation • modeling • loading DATA WAREHOUSE • central repository • subject-based data marts • metadata • operational data store Data Warehouse Source Database DATA DELIVERY • user-facing applications • report generation • subject-based data cubes • data mining DATA CONSUMPTION • business intelligence • decision-support • OLAP • querying • reporting Application Servers Web Client Interfaces Decision Support Servers Desktop Interfaces Data Mart Source Database E T L Metadata Operational Data Store Other Sources (e.g. files, spreadsheets) Data Cube