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A widely-used, but no longer current standard defining the information content for a set of digital geospatial data required by the US Federal Government.
CSDGM was sponsored by the US Federal Geographic Data Committee. However, in September 2010 the FGDC endorsed ISO 19115 and began encouraging federal agencies to transition to ISO metadata.
A common base profile of DDI for use by the member archives of CESSDA.
An extension of ISO 19115 defining the schema required for describing imagery and gridded data.
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.
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.