Data Documentation Initiative

The Data Documentation Initiative (also known as DDI) is an international standard for describing surveys, questionnaires, statistical data files, and social sciences study-level information. This information is described as metadata by the standard.

Begun in 1995,DDI History the effort brings together data professionals from around the world to develop the standard. The DDI specification, most often expressed in XML, provides a format for content, exchange, and preservation of questionnaire and data file information. DDI supports the description, storage, and distribution of social science data, creating an international specification that is machine-actionable and web-friendly.About DDI

Version 2 (also called "Codebook") of the DDI standard has been implemented in the Dataverse data repository and the data archives of the Inter-university Consortium for Political and Social Research. The latest version 3.3 (also called "Lifecycle") of the DDI standard was released in 2020.DDI Specification

Member Institutions

InstitutionDDI-Members Abbr.CountryAristotle Cloud Services AustraliaACSAAustraliaAustralian Bureau of StatisticsABSAustraliaCentro De Investigaciones Sociológicas CISSpainColecticaColecticaUS Cornell UniversityCISERUS Danish Data ArchiveDDADenmarkData Archiving and Networked ServicesDANSNetherlandsFinnish Social Science Data ArchiveFinland German Socio-Economic Panel Study SOEPGermanyGESIS – Leibniz Institute for the Social SciencesGESISGermanyInstitute for Quantitative Social Science at Harvard UniversityIQSSUS Institute for the Study of Labor IZAGermanyInter-university Consortium for Political and Social Research ICPSRUSMassachusetts Institute of Technology MITUSNorwegian Social Science Data ServicesNSDNorway Open Data FoundationPrinceton UniversityUSResearch Data Centre of the German Federal Employment Agency, Institute for Employment ResearchIABGermanyRoper Center for Public Opinion ResearchUSStanford UniversityUSSurvey Research Operations, University of MichiganUSSwedish National Data ServiceSNDSwedenSwiss Foundation for Research in Social SciencesFORSSwissU.S. Bureau of Labor Statistics (Associate Member)USUK Data ArchiveUKHLS/BHPSUKUniversity of AlbertaCanadaUniversity of CaliforniaUCDATAUSUniversity of GuelphCanadaUniversity of Minnesota, Minnesota Population CenterMPCUSUniversity of Toronto Scholars PortalCanadaUniversity of Washington, Center for Studies in Demography & Ecology CSDEUSUniversity of Wisconsin-Madison Institute on AgingMIDUSUSWorld Bank, Development Data GroupDECDGUS

Data Documentation Initiative

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