DDI-Lifecycle 3.3 addresses around 90 issues found during the implementation and use of version 3.2 and relating to the incorporation of the work of the Survey Development and Implementation (SDI) working group. These changes focus on following main areas: Inclusion of SDI work (sampling, weighting, and questionnaire development) Question Grids Measurement The use of base classes to allow for clearer referencing and expansion Serialization of classes (allowing classes to exist without the use of a specific packaging element) Documentation Without going into specific details, this presentation will present how these changes open up better support for the management of elements within a data base, increase Question Grid ease of use, clarify measurement, and open paths to transformation to future versions of DDI.