1. MISSY 2 [Microdata Information System – part 2]
Implementing DDI 3: The German Microcensus Case Study

2. Information Processes in the Social Sciences
Frank Sawitzki
Prof. Dr. York Sure Sure
Andias Wira Alam
Benjamin Zapilko
Daniel Hienert
Engin Sagbas
Oliver Hopt
Peggy Fischer
Peter Mutschke
Dr. Philipp Mayr
Philipp Schaer
Wei Shen
Siegfried Schomisch
Ute Koch
Timo Wandhöfer
Simon Bachenberg

3. Issues: Documenting the Metadata at Variable Level. DDI 3 Editor?
Metadata Presentation?

4. (Scientific Community)
General Work Flow A B
Public
(Scientific Community)
Federal Statistical Office A B
The Federal Statistical Office (Destatis)…
provides access to microdata for scientific purposes (scienitifc use files).
provides survey documents for MISSY.
in collaboration with, produces scientific use files of the Microcensus (e.g. anonymisation, construction of variable labels).
GESIS provides…
provides metadata for the Microcensus scientific use files on the Web (MISSY): codebook and detailled variable information in DDI 3 format.
study description and study related material (e.g. questionnaires, definitions, interviewer guides).
examples and recommendations on analysing the metadata. 4 4

5. (Example: Code Book and Questionnaire)
Available Materials
(Example: Code Book and Questionnaire)
Code Book

6. (Example: Code Book and Questionnaire)
Available Materials
(Example: Code Book and Questionnaire)
Questionnaire

7. Code Book & Questionnaire
What goes to where?
(DDI 3 structure)
Questionnaire
Code Book & Questionnaire
Code Book
Variable Name (EF Number)
Variable Label
Question Number (no text and other details)
Frequencies
Question Number
Question Text

8. <DataCollection> <QuestionScheme> <QuestionItem>
What goes to where?
(DDI 3 structure)
DDI 3
Code Book & Questionnaire
Code Book
Variable Name (EF Number)
Variable Label
Question Number
Question Text
Frequencies
<DataCollection>
<LogicalProduct>
<PhysicalInstance>
<QuestionScheme>
<CategoryScheme>
<Statistics>
<VariableScheme>
<VariableStatistics>
<QuestionItem>
<Variable>
reference
reference

9. Subjects (Categorization)
Comparable Variables
(DDI 3 structure ++)
Subjects (Categorization)
Subject 1
Subject 1.1
Subject 1.2
Subject 2
Subject 2.1
Subject 2.1.1
Subject
Subject
EF xy (1995)
belongs to
comparable
comparable
belongs to
EF yz (1996)
comparable
presentation
EF xy (1995)
EF yz (1996)
Subject 1.2
Subject 1.1

10. DDI 3 Editor
1973.ddi
1978.ddi
2004.ddi
2007.ddi
Support Multi User

12. Software Architecture
DDI 3
EDITOR
WebDAV
Server
store
DBClear
Data Service
Transforming DDI 3 into DBClear format
WebServer
(Typo3)
XML + XSLT + Groovy
USERS
HTML View
edit
DDI 3.0 Editor
DDI Service
Web Information System
request
Software Architecture
Views c a b
Model

13. DDI to Metadatabase
Lucene Index
Database Indexing

14. Web Information System in MISSY: (3 detail views of the metadata - dynamic pages)
List of Variables (Variablenliste).
Subject Outline (Thematische Gliederung).
Timeline Matrix of Variables (Variablen-Zeitpunkte-Matrix).

18. Acknowledgement Future Work
This project is funded by the BMBF Germany (01UW "Servicezentrum für Mikrodaten der GESIS / MISSY II").
Future Work
Integrating with regional microcensus.
Improving our application (e.g. performance, search capabilities, object oriented database, etc) so it can be used also by other studies.
Open Research Data.