Metadaten

Metadaten sind Daten, die Daten beschreiben. Oft enthalten sie Informationen über die Struktur einer Datenbank oder eines Data Warehouse und ihre Speicherungsstrukturen.

Different Types

• Business Metadata

  • terms and definitions
  • logical data mapping
  • data ownership
  • charging policies

• Process Execution Metadata

  • Data acquisition schedule.
  • Data Cleaning specifications.
  • Aggregate specifications.
  • Slowly changing dimensions policies.
  • Duration of Extract Transform Load, rows rejected and successfull.

• Technical Metadata

  • table structure and attributes
  • derived data definitions
  • results from Data Profiling
  • Data Lineage → where did this data point come from