1. A Generic System for Clearinghouses
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 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 Regular domain specific Queries
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 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"/> <! == 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
</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. Online Dissertations: Conference Announcments: -Conference date
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
...