DDI-C 2.5 Development History
DDI Codebook Version 2.5 is under public review as of October 25, 2011. This version is an XML Schema. It incorporates new substantive elements requested by the community and is designed to make it easier to migrate documents to DDI Lifecycle for those interested in doing so.
DDI Codebook 2.5 is backward compatible with DDI 2.1. A change log in the download package identifies all changes. The public review period for DDI Codebook 2.5 ends on Friday, November 18. To provide comments, please send email to the DDI Technical Implementation Committee.
XML Schema
Download DDI Codebook 2.5 for review (zip 484K)
The XML Schema files of DDI 2.5 are also available for online usage.
Changes from 2.1
View all changes in DDI-C 2.5 (Excel 152K)
Changes summary (PDF 91K)