DDI Lifecycle v3.3
Download Package
DDI Lifecycle Documentation (all versions)
Errata
XML Schema (entry point): https://ddialliance.org/Specification/DDI-Lifecycle/3.3/XMLSchema/instance.xsd
Development Work
DDI-Lifecycle 3.3 was published on April 15, 2020. This version of the DDI Lifecycle specification builds on DDI Lifecycle 3.2, correcting documented bugs, refining some aspects of the specification and adding new functionality to support</div>
- Classification management (based on GSIM / Neuchatel)
- Non-survey data collection (Measurements)
- Sampling
- Weighting
- Questionnaire Design
- Support for DDI as a Property Graph (properties on terms and references)
- Quality Statement improvements (useful for Eurostat reporting)
A change document in the download package identifies all changes, including which changes were backward compatible and the steps to take to move DDI 3.2 instances to DDI 3.3. A summary of this is also provided.
Informational Documentation
- Linked Field-Level documentation
- Technical Guide
- Model Documentation
- Implementation Guide: Best Practices for Usage of DDI 3.2 and Future Versions
- Change Document
- Change Summary