Use Cases and Implementations
Based on the DDI 3.0 Final Specification (04-01-2008)
An excel spreadsheet illustrating the use cases and implementations and their relationships to DDI 3.0 features may be downloaded.
* Some of the downloadable files are XML files that are invalid because they contain comments on how the markup should be structured. For those files, simply right-click on the link and save the file to your desktop, rather than attempting to display it within your Web browser.
Name | Overview | Primary Features | URL/Status | Contact(s) |
---|---|---|---|---|
Use Cases | ||||
CESSDA Metadata Markup (Word 62K) | List of recommended elements in DDI 3.0 presented in the form of an xml template ready to use for creating markup. | 2.0 compatibility | download | |
CESSDA Metadata Profile (Word 63K) | Use of the new DDI 3 Profile mechanism to indicate recommended elements for CESSDA Metadata. | Profile | download | |
DDI 3.0 Core Markup (Word 62K) | List of recommended elements in DDI 3.0 presented in the form of an xml template ready to use for creating markup. | 2.0 compatibility | download | Sanda Ionescu |
DDI Core Profile (Word 63K) | Use of the new DDI 3 Profile mechanism to indicate recommended elements for DDI 3.0 Core. | Profile | download | Sanda Ionescu |
Geographic Coverage for NHGIS (Word 42K) | The Geographic Coverage statement for NHGIS (U.S. Aggregate Census data from 1860 to 2000) geographies | Geography / External referencing / Geographic time / Resource package | download (zip 56K) | Wendy Thomas |
Geographic Response Domain (Word 42K) | Project with geographers at University of Minnesota and University of North Carolina for specific cases to test out the Geographic Response Domain for questions collecting data for data points. | Geography | download (zip 2K) | Wendy Thomas |
ICPSR Metadata Record Example (Word 61K) | Mark-up for a sample ICPSR metadata record in DDI 3.0: American National Election Study, 2004: Pre- and Post-Election Survey (ICPSR 4245). | Archive and organization / 2.0 compatibility / Geography | download | Sanda Ionescu |
ICPSR Metadata Profile (Word 63K) | DDI 3 template with recommended elements for marking up ICPSR Metadata Records. | Study-level documentation | download* | Matthew Richardson |
Integration with Blaise CAI Software (Word 64K) | DDI integration in the Blaise software. | Question bank / Survey instrument | See use case description for access information | Tom Piazza; Lon Hofman |
Integration with CSPro CAI Software (Word 73K) | Integration of DDI export in the CSPro software | Archive and organization / Standard variables / Multiple physical instances/ Survey instrument | A DDI converter was integrated into the CSExport tool in the standard CSPro release package. For information and download, visit: https://www.census.gov/data/software/cspro.html | Pascal Heus |
International Standard Classification of Occupations ISCO 88 (Word 81K) | Creation of an external reference for standard codes for occupations. | Standard variables / Versioning / Resource package / External referencing / Multilingual | download (zip 62K) | Joachim Wackerow |
Interview to Internet Project (Word 81K) | Project to create a shared data model for two units at the Institute for Social Research, University of Michigan. The database content will flow from Blaise CAI instruments and be exportable as DDI 3 XML. DDI can also be imported into the database. | Survey instrument / Question and variable bank | This diagram (zip 116K) shows the functionality of the project. | Nicole Kirgis Sanda Ionescu |
Life Cycle Example (Word 67K) | Documentation of survey life cycle information for ICPSR study no. 5809, "American Foreign Policy Officials Study, 1966". Processing notes are available. | Archive and organization / Life cycle events / Versioning / Data processing | download (zip 49K) | Sanda Ionescu |
NCubes DDI 2 to 3 Translation (Word 68K) | Example of a file that allows for hierarchical coding structures and use of various levels of the structures by variables. NCubes with associated suppression flags (table, dimension, and/or cell level suppression) are included. | NCubes backward compatibility / External referencing / Standard variables / Conceptual components / Universe statement / Archiving and Organization / NCube storage types / Multiple physical instances | download (zip 5K) | Wendy Thomas |
Simple Questionnaire Example (Word 94K) | Markup in DDI 3 showing flow logic of a survey instrument. | Survey instrument / Universe statement | download (zip 3K) | Wendy Thomas |
SOEP Panel Study (Word 72K) | Markup of SOEP panel study to show metadata reuse. | Grouping / Comparison by design / Versioning / Complex files / Resource package | download (zip 100K) | Joachim Wackerow |
Spatial Coverage Example (Word 92K) | Illustration of Minnesota Population Center NHGIS geographic coverage including the use of the bounding box feature. | Geography | download | Wendy Thomas |
Survey of Three Generations of Mexican Americans, 1981-1982 (ICPSR 9413) Codebook (Word 66K) | Markup of a subset of a codebook in DDI 3. | Archive and organization / Conceptual components / Universe statement | download | Sanda Ionescu |
U.S. Census 2000 Mapping (Word 43K) | 2000 U.S. Census form and IPUMS mapping. | Grouping / Comparison after the fact / Complex files / Survey instrument | coming soon | Wendy Thomas |
Veto Points Markup Example (Word 70K) | Markup in DDI 3 showing study documentation. | Survey instrument / Geography / 2.0 compatibility | coming soon | Wendy Thomas |
Implementations/Tools | ||||
DDI Foundation tools Project (Word 77K) | Library of open-source tools on which DDI 3 implementations may be built. | External referencing / Grouping / Versioning | http://tools.ddialliance.org/ http://forge.opendatafoundation.org/ gf/project/dditools/ |
Pascal Heus |
DExT Project Tools for Format Conversion and Preservation (Word 71K) | DDI 3.0-based tools to facilitate preservation of data and conversion to various statistical packages file formats. | Archive and organization / Standard variables (variables, codes, categories) / Multiple physical instances (primarily ASCII) / Data processing / Microdata payload / Versioning | Import functionalities and an export script generator are integrated. Java package to read SPSS data files and export DDI 3.0_CR2 metadata has been beta released. URL: http://www.data-archive.ac.uk/dext/ http://forge.opendatafoundation.org/ gf/project/ukda_dext/ |
Pascal Heus |
DeXtris Conversion Tool (Word 74K) | Tool to convert DDI 2 to DDI 3. | 2.0 compatibility | http://www.opendatafoundation.org/ tools/dextris/ |
Pascal Heus |
ICPSR Editor Tool (Word 69K) | Tool to create basic markup in DDI 3. | 2.0 compatibility | ICPSR Editor Tool (zip 661K) http://www.ddialliance.org/sites/ default/files/ddi3/DDIWebLatest.zip |
Sanda Ionescu, Aalap Doshi |
SAS Exporter Tool (Word 75K) | Tool to convert SAS input to DDI 3 output. | 2.0 compatibility / Data processing | Joachim Wackerow | |
SPSS Exporter Tool (Word 75K) | Tool to convert SPSS input to DDI 3 output. | 2.0 compatibility / Data processing | http://db.zuma-mannheim.de/DDI/ StatsProgs2DDI/StatsProgs2DDI.html |
Joachim Wackerow |
Stylesheet to display DDI 3.0 Variables (Word 64K) | Renders XML to present concept groups, concepts, questions, variables, categories, and frequencies | 2.0 compatibility /Multilingual | URL for stylesheet: http://www.ddialliance.org/sites/default/files/ddi3/vardisplay.xsl URL for display: http://www.ddialliance.org/sites/default/ files/ddi3/9413_CR3_2_FULLVariables.xml |
Matthew Richardson |
Survey Visualization Tool (Word 48K) | Automatic generation of DDI instrument documentation from CASES, Blaise, and CSPro source files. Based on the DDI data model, the software provides: - Automatic visualizations of survey flowcharts - Automatic codebook generation - Export of flowcharts and codebooks to various publishable formats - Data overlays on top of the instrument visualizations |
Question bank / Survey instrument / External referencing | http://www.colectica.com/resources | Jeremy Iverson |