1. Introducing the Data Documentation Initiative
Steven Vale
UNECE

2. What is DDI?
The Data Documentation Initiative (DDI) is an effort to create an international standard for describing data from the social, behavioral, and economic sciences
not directly tied to them, nor other concrete implementation details
Provides common semantics that can be used unambiguously across and between different implementations

3. More details The DDI metadata specification:
Is expressed in XML
supports the entire research data life cycle
DDI metadata accompanies and enables data conceptualization, collection, processing, distribution, discovery, analysis, repurposing, and archiving.
While GSIM is a conceptual model, it can be implemented to different levels.
As a reference framework, GSIM Provides over-arching guidance to the development and use of statistical implementation and technology standards. GSIM is not directly tied to any particular implementation standard or technology solution.
Where GSBPM defines the statistical production process and sub-processes; GSIM defines the information associated with the statistical production process, including the flows of information, the business rules and process-related quality metrics. GSIM can however be implemented as a standalone framework or integrated with local business process models.

4. Versions of DDI First generation: DDI Codebook
Versions 1.0 to 2.1
Focuses on single archived instance
Second generation: DDI Lifecycle
Versions 3.0 to 3.2
Goes beyond the single survey concept
Third generation: DDI 4.0
In early stages of preparation

5. DDI Lifecycle Model

6. The DDI Alliance Membership based organisation
Data archives, producers, research data centers, university data libraries, national and international statistical organisations
Annual conferences in Europe and North America

7. DDI and SDMX in the GSBPM

9. More information
DDI Alliance Web site 9