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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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