This document discusses building an editable, versioned linked open data (LOD) service for library data. It describes lobid.org, an experimental LOD service for library organizations and resources. It notes challenges with keeping legacy library data in LOD up-to-date. The vision is to create a service that allows producing, editing, and versioning RDF data, supports reusing external LOD datasets, and pushes changes in real-time. Fresnel is proposed as a way to control how RDF properties are displayed. The goal is a cooperative cataloging infrastructure to aggregate library descriptions.

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