DW 2.0 offers some major signifi cant improvements over fi rstgeneration data warehouses.
DW 2.0 offers the recognition that there
is a life cycle of data once it enters the data warehouse, the notion
that structured and unstructured data belong in the data warehouse,
and the idea that metadata is an essential and normal part of the data
warehouse.
Four Sectors are
1. Interactive
2. Integrated
3. Near Line
4. Archival
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