Skip to content
The suite of DDI Alliance products has been formally recognized as an international standard through the publication of ISO/PAS 25955:2026 -- Learn more
  • There are no suggestions because the search field is empty.

DDI-Lifecycle v3.2

Published: 2014-03-12 Updated: 2024-05-15

Field level documentation

Entry points:

XML Schema: https://ddialliance.org/Specification/DDI-Lifecycle/3.2/XMLSchema/instance.xsd

NOTICE 2014-05-15: The DDI 3.2 schema package was reissued on 2014-05-15 to correct an error in the HTML version of the Field Level Documentation which resulted in a small number of broken links. No change has been made to the contents of the schemas themselves.

Added Coverage

  • Descriptive documentation of the content, meaning, provenance, and access for a single data set
  • Archival preservation of descriptive content
  • In-put basis for more complex descriptions
  • In-put content for discovery and exchange of data at the study, data file, variable, and question level
  • In-put content for a structured human-readable codebook for the data set as a whole
  • Populate variable and question banks to explore available data and question structures for reuse in new survey



Download

Main Product Page

Earlier versions:

This version of the DDI Lifecycle specification builds on DDI Lifecycle 3.1, correcting documented bugs and refining some aspects of the specification. A change document in the download package identifies all changes, including which changes were backward compatible and the steps to take to move DDI Lifecycle 3.1 instances to DDI Lifecycle 3.2.