DDI-Lifecycle v3.2
Download Package
DDI-Lifecycle Documentation (all versions)
XML Schema (entry point): https://ddialliance.org/Specification/DDI-Lifecycle/3.2/XMLSchema/instance.xsd
NB - 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.
Development Work
DDI Lifecycle 3.2 was published on March 12, 2014. 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.
- 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 surveys