A widely used, international standard for describing data from the social, behavioral, and economic sciences. Two versions of the standard are currently maintained in parallel:
Both versions are XML-based and defined using XML Schemas. They were developed and are maintained by the DDI Alliance.
A set of common technical and statistical standards and guidelines to be used for the efficient exchange and sharing of statistical data and metadata.
Sponsoring institutions include BIS, ECB, EUROSTAT, IMF, OECD, UN, and the World Bank. Technical Specification 2.1 was amended in May 2012.
A common base profile of DDI for use by the member archives of CESSDA.
The Data Documentaion Initiative website's list of tools to implement the DDI standard.
Server-side software for building a data portal, with a particular focus on survey datasets. It uses DDI to provide access to the data at the level of concepts and variables. For an example of it in use, see the SOEPinfo data portal.
A suite of tools for managing data and metadata in SDMX.
A simple tool for managing and accessing statistical metadata, using the SDMX framework.
A tool to facilitate the mapping between the structural metadata provided by an SDMX-ML Data Structure Definition and those that reside in a database of a dissemination environment.
A list of software tools supporting the SDMX standard.
Provides a seamless interface to datasets from social science data archives across Europe using the CESSDA MLI profile of DDI.
The Data Documentation Initiative website's list of projects adopting or encouraging DDI as a standard.
Links to DDI 3 use case papers, which were the outcomes of a workshop held at the Schloss Dagstuhl - Leibniz Center for Informatics in Wadern, Germany, November 2-6, 2009.
The statistical office of the European Union, which implementats SDMX in a number of projects.
A data archive providing leadership and training in data access, curation, and methods of analysis for the social science research community; all metadata conforms to the DDI standard.
Provides members of the scholarly community with access to files associated with scholarly studies for the purpose of replication, for all studies conducted by ISPS-affiliated researchers. ISPS metadata records conform to DDI requirements and include a minimal set of Dublin Core metadata elements.
The SDMX website's list of current and planned practical implimentations from national and international organisations.
Curator of the largest collection of digital data in the social sciences and humanities in the United Kingdom, the archive uses DDI as the basis for its catalogue records.