This document discusses plans to link together data from the Theater Institute of the Netherlands (TIN) and the University of Amsterdam Library (UBA) using linked data principles. It proposes assigning URIs to entities in TIN's collection of plays, productions, and performances and representing the data in JSON. JavaScript would then be used to retrieve and display this information within UBA's online catalog. The goals are to prove the concept of linked data, convince these cultural heritage institutions to adopt it, and link their data by publishing it on the web in RDF. Challenges that could be addressed in the future include developing appropriate vocabularies, adding more URIs and relationships, and linking UBA's bibliographic metadata to TIN's

1. University library
Dutch Culture Link
Lukas Koster
Library Systems Coordinator
Library of the University of Amsterdam
l.koster@uva.nl
http://twitter.com/lukask

2. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Linked data?
1. Use URIs as names for things
2. Use HTTP URIs so that people can look up those
names.
3. When someone looks up a URI, provide useful
information, using the standards (RDF*, SPARQL)
4. Include links to other URIs, so that they can discover
more things.
Tim Berners Lee
Design issues
http://www.w3.org/DesignIssues/LinkedData.html

3. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Linked data!
Linked Data is a methodology for
 providing relationships between things (data, concepts
and documents)
 anywhere on the web,
 using URI’s for identifying,
 RDF for describing
 HTTP for publishing these things and relationships,
 in a way that they can be interpreted and used by
humans and software.
http://commonplace.net/2009/06/linked-data-for-libraries/

4. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Data is relationships
Triples
 subject-predicate-object
 a person (subject) is the
author of (predicate) a
book (object)
 a book (subject) is about
(predicate) a person
(object)

5. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Relationships?
 Entity Relationship
Diagram

6. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
On the web
 Relationships
 Not internal, within same database silo
 External, with all kinds of web sources
 “Things” identified by URIs
 Relationships too!

7. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Vocabularies (Ontologies)
Datamodellen
RDF – Resource Description Framework

8. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Content negotiation

9. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
The Linked Open Data Project - partners
 DEN – Digital Heritage Foundation of
The Netherlands
 Digital standards for heritage institutions
 Promoting linked open data: museums, etc.
 Simple guidelines
 UBA – Library of the University of
Amsterdam
 TIN – Theater Institute of The
Netherlands

10. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
The Linked Open Data Project - Objectives
 Set an example
 Proof of concept
 Pilot
 Convince heritage institutions
 Convince TIN, UBA management
Dutch Culture Link

11. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
The Linked Open Data Project – 2 viewpoints
Publish
Use

12. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
The TIN Collection
 Theater performances
 Metadata
 Digital objects
 Audio
 Video
 Images
 Photos

13. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
The UBA OPAC
 Metadata
 Bibliographic
 MARC

14. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
The TIN Collection Data model

15. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
The TIN Collection Data model

16. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
FRBR?
 Work
 Expression
 Manifestation
 Item
 Play
 Production
 Production
 Performance
(translation?)
 Play
 Translation
 Edition
 Copy

17. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Questions….
 Which vocabulary/ontology?
 How to implement RDF?
 How to format URIs?
 Which tools, techniques, languages?
 How to find/get published linked data?
 How to process retrieved linked data?

18. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Training
 Lots of sites, tutorials on line
 Training: no money
 DANS Linked Open Data workshop

19. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Quick and dirty
 TIN
 URIs for data entities
 JSON
 UBA
 JavaScript: construct TIN URI
 Process JSON
 Present data in record
AGILE!

20. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
TIN
 URI
 <base-url>/person/<personname>
 <base-url>/play/<personname>/<title>
 <base-url>/production/<personname>/<title>/<opening>
 <base-url>/performance/<personname>/<title>/<opening>/<datetime>
 …
Ad Aerts

21. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
TIN – URI + JSON Example
 <base-url>/person/Beckett, Samuel
jsonTIN({
"key":"beckett, samuel",
"name":"Beckett, Samuel",
"birth.country":"Ierland",
"birth.date":" 1906*",
"birth.place":"Foxrock",
"death.date":"1989-12-22",
"death.place":"Parijs"
})

22. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
UBA OPAC
<base-url>/person/Beckett, Samuel

23. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
UBA – JavaScript: create URI
Roxana Popistaşu

24. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
UBA – JavaScript: process JSON

25. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
UBA OPAC results

26. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Is this linked data?
 Not yet……

27. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Next steps - TIN
 Vocabulary for Production/Performance subject area
 Vocabularies for Persons (FOAF?), Subjects (SKOS?)
 RDF in JSON (internal relationships)
 Publish RDF/XML
 More URIs
 External links
 Content negotiation
 Add digital objects

28. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Next steps - UBA
 More “search” fields (Title)
 Extend presentation
 Include relations
 Clickable

29. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
TIN – Extra URIs: person + plays(productions?)

30. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
TIN – Extra URIs: productions

31. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
TIN – Extra URIs: specific production

32. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Finally
 Reverse stuff
 Publish UBA
bibliographic metadata
as linked data
 Get UBA linked data
into TIN results

33. 22 november, 2010 Dutch Culture Link - Lukas Koster
University library
Issues
 Use generic, really unique URIs
 Person: id’s (VIAF?)
 Plays: id’s?
 Central mapping authority
 UBA OPAC person (OCLC PPN) = TIN person
 Digital material
 Copyright