Document, Discover and Interoperate

The Data Documentation Initiative (DDI) is an international standard for describing statistical and social science data. Documenting data with DDI facilitates interpretation and understanding -- both by humans and computers. The freely available international DDI standard describes data that result from observational methods in the social, behavioral, economic, and health sciences. Use DDI to Document, Discover, and Interoperate!

Why Use DDI?

  • Generate interactive codebooks
  • Implement data catalogs
  • Build question banks
  • Create concordance mappings
  • Harmonize and compare data
  • Manage longitudinal data sets

Featured DDI Adopters