Metadata Repository
Meta data is the data defining warehouse objects. It has the following kinds
- Description of the structure of the 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
- Business data
- business terms and definitions, ownership of data, charging policies