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    • Annual Report 2006 (PDF)
    • Annual Report 2005 (PDF)
    • Annual Report 2004 (PDF)
    • Strategic Plan, 2007 and Beyond (PDF)
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 Document Type Definition (DTD)
 XML Schema (XSD)
 DDI Lite (Recommended Elements)
 Version Control for DTD
 Information on DTD Elements (DDI Tag Library)
 Mapping to Other Metadata Standards
  • Dublin Core
  • Recommended Fields (CESSDA) (PDF)
 Related Tools
  • Software/Tools
  • XML/XSLT

Working Groups

Technical Implementers Committee (TIC, formerly Structural Reform Group)

Comparative Data/Families of Datasets Working Group

Aggregate Data, Geography & Time Working Group

Instrument Documentation Working Group

Usability and Outreach Working Group

Controlled Vocabularies Working Group

Charge: Stage 1: To develop controlled vocabularies on already identified DDI elements. Stage 2: To determine which other DDI elements require controlled vocabularies and develop those.

Timetable: Start November 2007, Stage 1 completed by June 2008. Stage 2 completed by June 2009.

Qualitative Data Exchange Working Group

Charge: To develop a robust XML based schema for qualitative data exchange and encourage tools development based upon these needs.

Timetable: Start Jan 2008, first draft schema to be produced Jan 2009. Agreed schema Dec 2009.

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