1. Building an editable,
versionized LOD service
for library data
May, 16th 2012
ELAG 2012, Palma de Mallorca
Felix Ostrowski & Adrian Pohl

2. Agenda
 lobid.org
 Fresnel Display Vocabulary for RDF
 Implementation
 Vision

3. lobid.org

4. Why LOD? - Motivation
 LOD as ideal basis for distributed
cooperative cataloging
 Use of international and cross-domain web
standards leads to
 Increased discoverability
 Multiple usability of one dataset
 Maximized interoperability & re-usability
 Flexible data model
 Expected ROI: Synergy effects through
standardization of technology stack

5. lobid.org
 Experimental LOD service
 Launched in 2010
 Two subservices
 lobid-organisations
 lobid-resources
 Continuously improved

7. lobid-organisations
 Motivation: the need of URIs for libraries
 RDF representations of more than 40k
international organisations
 Data sources: German ISIL registry & MARC
Organization Code database
 Not (yet) openly licensed

9. lobid-resources
 lobid.resources is the LOD interface for open
data from the hbz union catalog
 Public Domain: licensed under CC0
 Currently more than 10 M records
 Links to other library LOD services (GND,
DDC...) and to Dbpedia
 See also
http://thedatahub.org/dataset/lobid-resources

11. Problems
 Data is produced in legacy systems & added
via dumps
 Data isn't up-to-date
 Data can't be improved in lobid.org and fed
back to legacy system

12. Vision: Building a service that...
 is based on Linked Data standards,
 supports producing/editing RDF,
 supports re-use of data from the LOD cloud,
 supports versioning,
 pushes changes (create, update, delete) in
real time.

13. Fresnel
http://www.w3.org/2005/04/fresnel-info/manual/overview.gif

14. Lenses
:document :person
a fresnel:Lens ; a fresnel:Lens ;
fresnel:classLensDomain fresnel:classLensDomain
bibo:Document ; foaf:Person ;
fresnel:showProperties ( fresnel:showProperties (
dc:title foaf:familyname
bibo:isbn foaf:givenname
dc:creator ) .
) .

15. Sublenses
:document
a fresnel:Lens ;
fresnel:classLensDomain bibo:Document ;
fresnel:showProperties (
dc:title
bibo:isbn
[ a fresnel:propertyDescription ;
fresnel:property dc:creator ;
fresnel:sublens :person ]
) .

16. Formats
[] a fresnel:Format ;
fresnel:propertyFormatDomain dc:title ;
fresnel:label "Title"@en .
[] a fresnel:Format ;
fresnel:propertyFormatDomain dc:creator ;
fresnel:label "Author"@en .
[] a fresnel:Format ;
fresnel:propertyFormatDomain foaf:familyName ;
fresnel:label "Last name"@en .
[] a fresnel:Format ;

17. Fresnel Abstract Box Model

18. Instantiated Box Model

19. Phresnel

21. Phresnel Forms

25. Performance issues

26. An alternative: JS-based editing

27. Storing data

28. Vision: Cooperative cataloging in a
service-oriented library
infrastructure

29. Building a service-oriented library
infrastructure
 Part of a grant proposal German Research
Foundation's infrastructure programme
 Aggregating and bundling descriptions in
one national registry
 Real-time communication
 Easy to use Web Services

31. Further information
• hbz LOD blog (news around lobid.org)
• Phresnel source code on github:
https://github.com/lobid/PhresnelApp

32. Thanks.
Questions?
With pleasure now/here or also later to
felix.ostrowski@googlemail.com or
semweb@hbz-nrw.de
32

33. License
These slides are published under a Creative
Commons license:
http://creativecommons.org/licenses/by/3.0/de/
33