Releases: ddialliance/ddi-l_3
DDI-L 3.3
DDI-Lifecycle is designed to document and manage data across the entire life cycle, from conceptualization to data publication, analysis and beyond. It encompasses all of the DDI-Codebook specification and extends it. Based on XML Schemas, DDI-Lifecycle is modular and extensible. This version also supports improvements in Classification management (based on GSIM / Neuchatel), non-survey data collection (Measurements), sampling, weighting, questionnaire Design and support for DDI as a Property Graph.
Version specific changes
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
- 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.
DDI-L 3.2
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.
DDI-Lifecycle is designed to document and manage data across the entire life cycle, from conceptualization to data publication, analysis and beyond. It encompasses all of the DDI-Codebook specification and extends it. Based on XML Schemas, DDI-Lifecycle is modular and extensible. This version also supports improvements in Classification management (based on GSIM / Neuchatel), non-survey data collection (Measurements), sampling, weighting, questionnaire Design and support for DDI as a Property Graph.
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.
DDI-L 3.1
DDI Lifecycle 3.1 reflects the correction of bugs identified by implementers using DDI 3.0, and the resolution of the final URN structure to ensure persistent URNs for all identified elements. Note that DDI Lifecycle 3.1 is not backward compatible with DDI Lifecycle 3.0. A change file in the download package identifies all changes, including which changes were backward compatible and the steps to take to move DDI Lifecycle 3.0 instances to DDI Lifecycle 3.1.
On May 25, 2009, the DDI Alliance Expert Committee voted to publish the DDI 3.1 specification following minor corrections and resolution of the URN structure.
DDI-L 3.0
DDI Lifecycle 3.0, published in April 28, 2008, represented a major advancement for DDI by fully incorporating XML Schemas and moving to a data life cycle approach. Element content for DDI 3.0 was developed by several Working Groups with the technical specification itself created by the Technical Implementation Committee (TIC).