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- Meta data is the data defining warehouse objects. It stores:
- Description of the structure of the data warehouse
- schema, view, dimensions, hierarchies, derived data defn, data mart locations and contents
- Operational meta-data
- data lineage (history of migrated data and transformation path), currency of data (active, archived, or purged), monitoring information (warehouse usage statistics, error reports, audit trails)
- The algorithms used for summarization
- The mapping from operational environment to the data warehouse
- Data related to system performance
- warehouse schema, view and derived data definitions
- Business data
- business terms and definitions, ownership of data, charging policies
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