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DBClear

A database-driven portal system for flexible use in different contexts, with automation, multi-linguality, and support for various metadata standards.

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DBClear

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  1. DBClear A Generic System for Clearinghouses Heiko Hellweg, Bernd Hermes, Max Stempfhuber

  2. Facts • Cooperation of the Social Science Information Centre, Bonn and the Lower Saxony state and university library (SUB), Göttingen • Funded by the DFG” • Grant for two project members in Bonn and one in Göttingen from Oct. 2000 to Sep. 2002

  3. Goals • Creation of a generic, database driven portal system for flexible use in different contexts • Arbitrary description elements • Automation • Workflow • Multi linguality • Support for various metadata standards

  4. Description elements and structure • Attributes • Component field structure • Language dependency • Facettes • Categories • Relations

  5. Different Types of Descriptions • Stocks: types of described objects • Slots for attributes and facettes • Constraints • Views on the data

  6. Automation • Content Discovery • Extraction of existing Metadata • Educated guesses • Regular domain specific Queries • Automated Updates • Regular checks of referenced Documents

  7. Workflow Support • Vertical Workload Distribution • Domains of Expertise • Responsibility for certain Stocks or Categories • Horizontal Workload Distribution – e.g.: • formal description • Contentwise description • translation

  8. Technical Architecture Import/ Export Robot daemon Java application or applet XML Servlets Java Framework DB Servlet engine HTML Servlets Web browser Z39.50 client Z39.50 Server

  9. DBClear architecture goals • Multi tire architecture • Open standards • Platform independence • Different means of client access

  10. Flexible Presentation Layer By using XSLT to transform the output, the visual presentation can be adapted

  11. Scenario 1 DBClear as a standalone portal

  12. Scenario 2 Using external data sources

  13. Scenario 3 Integration into other systems

  14. DBClear technologies • Relational database for data storage • HTTP for data transfer • Java framework • Servlet engine • XML-Dom • XSL Transformations • Visitor access at least by plain HTTP/HTML • Administration via HTTP/HTML and java clients • Alternate services (Z39.50 server)

  15. GESIS Clearinghouse „Eastern Europe“ • Ca. 1500 eastern European institutions • „non eastern Europe“ and „non institutions“ are currently being catalogued • Cooperative work with responsibilities aligned according to regional aspects • Automatic checks for document reachability and modifications • Inflexible monolithic Implementation Slides: URLs: Besucherzugang Besucherzugang Mitarbeiterzugang Mitarbeiterzugang Geo-Guide Geo-Guide DBC DBC

  16. Datamodel

  17. Extended Datamodel

  18. XML-Definition <AttributeDescription LanguageDependant="false" reuse="false" id="0" label="link" DBTable="ATTR_LINK"> <Name xml:lang="en">link</Name> <Description xml:lang="en">url of the ressource described</Description> <Name xml:lang="de">Link</Name> <Description xml:lang="de">URL der beschriebenen Ressource</Description> <ComponentDescription Length="512" Type="VARCHAR" TableColumn="VALUE_1" id="1"> <MetaMapping domain="Z3950" field="1032"/> <!-- 1032 == docId --> </ComponentDescription> </AttributeDescription> <FacetteDescription label="izcls" id="1" LanguageDependant="true"> <!-- SocioGuide: ->KLASSIFIKATION --> <MetaMapping domain="Z3950" field="20" component="name"/> <!-- 20 == local classification --> <MetaMapping domain="Z3950" field="29" component="term"/> <!-- 29 == local subject index --> <Name xml:lang="en">Social Science Classification</Name> <Description xml:lang="en"> Classification of the Information Center Social Science, Bonn </Description> <Name xml:lang="de">Sozialwissenschaftliche Klassifikation</Name> <Description xml:lang="de"> Klassifiaktion des Informatinszentrums Sozialwissenschaften, Bonn </Description> </FacetteDescription>

  19. DBC Suche

  20. Detailansicht

  21. Browsing

  22. Browsing nach Klassifikation

  23. Browsing nach Region

  24. Bearbeitung

  25. Admin

  26. Selektion

  27. Suche

  28. Bearbeitung

  29. Worklist

  30. Geo-Guide: Browsing

  31. Geo-Guide: Ressourcen

  32. Geo-Guide: Details

  33. Geo-Guide: Suche

  34. Common Attributes • -Title • Keywords • Classification • Online Dissertations: • Author • Year of publication • Publisher • Abstract • ... • Conference Announcments: • -Conference date • Conference location • Call for papers • Submission deadline • ... • Institutions: • Address • Contact • ...

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