Machine-actionable study descriptions in DDI-Codebook 2.5 Format
FSD's machine-actionable study descriptions are now available in version 2.5 of the DDI-Codebook specification. Metadata files released earlier in DDI 2.0 have been replaced. DDI 2.5 metadata have already been available through our OAI-PMH interface.
With the introduction of DDI-Codebook 2.5, metadata interoperability has been improved. This version enables file validation using XSD schemas and offers wider possibilities in utilising persistent identifiers.
The conversion to DDI-Codebook 2.5 did not alter the content of study descriptions. The following technical changes have been implemented:
- Removal of the DOCTYPE declaration
- Change of the "codeBook" element to:
<codeBook xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="ddi:codebook:2_5" version="2.5" xsi:schemaLocation="ddi:codebook:2_5 http://www.ddialliance.org/Specification/DDI-Codebook/2.5/XMLSchema/codebook.xsd" xml:lang="ISO 639-1 language code">