Membership Documents
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  • Join the DDI Alliance
  • Membership Form (PDF)
Alliance Structure
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  • Steering Committee
  • Committee Meeting Minutes
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  • General Brochure
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  • Reports
    • Annual Report 2006 (PDF)
    • Annual Report 2005 (PDF)
    • Annual Report 2004 (PDF)
    • Strategic Plan, 2007 and Beyond (PDF)

Papers, Presentations, and Reports
Projects Using the DDI
DDI Users' Listserv
Getting Started with the DDI
Frequently Asked Questions (FAQ)
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Document Type Definition (DTD)
XML Schema (XSD)
DDI Lite (Recommended Elements)
Version Control for DTD
Information on DTD Elements (DDI Tag Library)

Mapping to Other Metadata Standards
  • Dublin Core
  • Recommended Fields (CESSDA) (PDF)
Related Tools
  • Software/Tools
  • XML/XSLT

Schema for DDI Version 3.0 (4-28-2008)

The following links lead to the schemas for DDI version 3.0. The main entry point is the wrapper module instance.xsd.

Module Name	Namespace	Filename/Link
Archive	ddi:archive:3_0	archive.xsd
Comparative	ddi:comparative:3_0	comparative.xsd
Conceptual Component	ddi:conceptualcomponent:3_0	conceptualcomponent.xsd
Data Collection	ddi:datacollection:3_0	datacollection.xsd
Dataset	ddi:dataset:3_0	dataset.xsd
Dublin Core Elements	ddi:dcelements:3_0	dcelements.xsd
DDI XHTML 1.1 Model	http://www.w3.org/1999/xhtml	ddi-xhtml11-model-1.xsd
DDI XHTML 1.1 Modules	http://www.w3.org/1999/xhtml	ddi-xhtml11-modules-1.xsd
DDI XHMTL 1.1	http://www.w3.org/1999/xhtml	ddi-xhtml11.xsd
DDI Profile	ddi:profile:3_0	ddiprofile.xsd
Group	ddi:group:3_0	group.xsd
Instance	ddi:instance:3_0	instance.xsd
Logical Product	ddi:logicalproduct:3_0	logicalproduct.xsd
Physical Data Product	ddi:physicaldataproduct:3_0	physicaldataproduct.xsd
Physical Data Product - NCube - Inline	ddi:physicaldataproduct_ncube_inline:3_0	physicaldataproduct_ncube_inline.xsd
Physical Data Product - NCube - Normal	ddi:physicaldataproduct_ncube_normal:3_0	physicaldataproduct_ncube_normal.xsd
Physical Data Product - NCube - Tabular	ddi:physicaldataproduct_ncube_tabular:3_0	physicaldataproduct_ncube_tabular.xsd
Physical Data Product - Proprietary	ddi:physicaldataproduct_ncube_proprietary:3_0	physicaldataproduct_proprietary.xsd
Physical Instance	ddi:physicalinstance:3_0	physicalinstance.xsd
Reusable	ddi:reusable:3_0	reusable.xsd
Simple Dublic Core	http://purl.org/dc/elements/1.1/	simpledc20021212.xsd
Study Unit	ddi:studyunit:3_0	studyunit.xsd
XML	http://www.w3.org/XML/1998/namespace	xml.xsd

Note: There are some non-DDI modules in this package, to facilitate the use of XHTML and XML Schema. These are documented separately by their maintainers.

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