DDI to DDL Conversion Service
This service is provided by the
Survey Documentation and Analysis (SDA)
project. It converts data description files in the format
Data Documentation Initiative (DDI)
to files in the format of SDA's Data Description Language
The Data Documentation Initiative "is an effort to establish an
international criterion and methodology for the content, presentation,
transport, and preservation of 'metadata' about datasets in the social
and behavioral sciences." As this international
standardization effort gathers momentum we expect more and more
datasets to be documented using DDI as the primary metadata format.
Survey Documentation and Analysis (SDA) is a project of the
Computer-assisted Survey Methods Program (CSM) at UC Berkeley to
provide software to enable Web-based documentation and analysis
of survey data. SDA has long had its own data description format -- DDL.
However, we also consider it essential to be compatible with the
new DDI standard. This service is part of SDA's goal to make inter-operability
with DDI as easy as possible for SDA users. Besides this service, which
converts DDI to DDL, SDA also provides programs that convert DDL to DDI
and produce DDI from SDA datasets.
page for more information.
This conversion service allows you to upload a DDI file from your computer
to the conversion service's computer. You can also choose various conversion
options which are explained on the service's
The help page also contains a section that discusses some of the issues
involved in converting DDI to DDL.
To start, continue to the