Public Review of DDI 3.3

`The DDI Alliance (http://www.ddialliance.org/) is pleased to announce the Public Review of DDI 3.3. This version of the DDI specification includes important updates and new content, including:

– Classification management (based on GSIM/Neuchatel)
– Non-survey data collection (Measurements)
– Sampling
– Weighting
– Questionnaire Design
– Support for DDI as a Property Graph
– Quality Statement improvements (useful for Eurostat reporting)

Additionally, DDI 3.3 has a formal model now, so a detailed changelog can be generated between DDI 3.2 and 3.3.

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Document, Discover and Interoperate

The Data Documentation Initiative (DDI) is an international standard for describing the data produced by surveys and other observational methods in the social, behavioral, economic, and health sciences. DDI is a free standard that can document and manage different stages in the research data lifecycle, such as conceptualization, collection, processing, distribution, discovery, and archiving. Documenting data with DDI facilitates understanding, interpretation, and use — by people, software systems, and computer networks. Use DDI to Document, Discover, and Interoperate!