1. Exanda A Flexible On-Line Tabulation System Using DDI 3 Part of Session: DDI 3 Tools: Possibilities for Implementers IASSIST Conference, Cornell University, June 1-4, 2010 Joachim Wackerow, GESIS – Leibniz Institute for the Social Sciences

2. Overview From User Perspective I Tables and charts in a web browser – Up to three variables – Multiple output formats – A bookmark can be set for each result page Multiple languages for content and user interface Web pages confirm to common rules of accessibility – Important for government institutions

3. Overview From User Perspective II Multiple output formats Tables with frequencies, common percentages Grouped and stacked column charts PDF report for printing with all tables and charts from above For further processing – DDI 3 nCube – Excel spreadsheet Flash client for explorative approach – Quick change of dimensions – Focus on subgroups Still in the works

4. Apache Web Server access control, encryption, compression, caching Java Application Server (i.e. Tomcat) Cocoon XML framework Transformation RDBMS (i.e. Postgresql) with JDBC Protocol data storage data selection/aggregation Web Browser Technical Overview Protected Network XML Database (i.e. eXist) with XML:DB Protocol document storage metadata selection

5. Cocoon XML framework / Transformation Table (HTML)Chart (PNG) Tables/Charts (PDF) Copy of DDI nCube for Exploration (Flash) Spreadsheet (Excel) GnumericFOFins Internationalization SVG Serialization POI-HSSFFinsFOP nCube o n t h e f l y MetadataData

6. Web Browser Scalability I Protected Network XML Database System eXist RDBMS Group II of studies Apache Web Server Tomcat I RDBMS Group I of studies Tomcat II

7. Scalability II RDBMS Data XML DBMS Metadata Tomcat XML Processing Apache Cache, Access Control Portal Apache Cache, Access Control Site 1 RDBMS Data XML DBMS Metadata Tomcat XML Processing Apache Cache, Access Control Site 2 Web Browser