1. Unit for Natural Language Processing
Finding, Linking and Organizing Resources with Linked Data & Natural Language Processing
Paul Buitelaar
Unit for Natural Language Processing
Digital Enterprise Research Institute - National University of Ireland, Galway
Copyright 2010 Digital Enterprise Research Institute. All rights reserved, Paul Buitelaar

2. Finding, Linking & Organizing Resources
What does that mean?
What is a (re)source? What is a link? What resources can we link – and how? How to find and organize resources and links?
Let’s go through an example…

3. Linking van Gogh (resources)

4. Linking van Gogh (links)

5. Linking van Gogh (objects)
personObj-1
Vincent van Gogh
personRepresentationObj-1
March 30th, 1853
personBirthObj-1
Zundert
locationObj-1
July 29th, 1890
personDeathObj-1
personObj-2
Auvers-sur-Oise
locationObj-2
personRepresentationObj-2
Theo van Gogh

6. Finding Resources (and Links)
Structured Data
(Proprietary databases, thesauri etc.)
Open-domain databases, thesauri, etc. …
… increasingly turned into ‘Linked Open Data’
Unstructured Data
(Proprietary textual descriptions, images, videos etc.)
Open-domain textual descriptions, images, videos etc. …
… to be turned into & connected with ‘Linked Open Data’

7. Finding Links in Text

8. Linking van Gogh - continued
personObj-1
Vincent van Gogh
personRepresentationObj-1
artistObj-1
artistObj-2
Diego Velazquez
personRepresentationObj-2
artistTechniqueObj-1
bold brushstrokes

9. The Remainder of this Talk
Linked Open Data (LOD)
Some LOD applications & tools
LOD and Natural Language Processing

10. Linked Open Data Turning web of documents into a Web of Data
Uniquely identifying web objects (documents, images, named-entities, facts, …)
Enabling the discovery & interlinking of web objects through semantic metadata
Open access to data

11. Linked Open Data ‘cloud’

12. Linked Open Media Data

13. LOD Applications Search Engine for the Web of Data
SIGMA (builds on
Contact: Giovanni Tummarello, DERI
Music Recommendation
Contact: Alexandre Passant, DERI
Research Collaboration Support, Expert Finding
Contact: Paul Buitelaar, DERI

14. Search the Web of Data with SIGMA

15. More Data – but also more issues…

16. dbrec : the Web of Data recommends…

17. Mary Black is related to Frances Black …

18. … and this is why

19. Saffron : Expert Finding

20. Expertise Topic Extraction

21. Publication Browsing

22. Expert Browsing

23. Publication Details: Abstract/PDF

24. Publication Details: Authors/Topics

25. Expertise Topic Details

26. Personalization

27. Personalized Expert Recommendation

28. Linking Objects in Saffron
LOD - Semantic Web Dog Food
Author
Document
Title
PDF
LOD - OntoWiki, FOAF
Affiliation
Researcher
Picture
Natural Language Processing
ExpertiseTopic
LOD - DBpedia
Topic

29. Other LOD Application Areas
Linked Open Drug Data (Matthias Samwald, DERI)
- W3C WG includes participation by Johnson & Johnson, AstraZeneca
Open Government Data (Richard Cyganiak, DERI)
- includes data sets from USA, UK, Australia, Canada, Sweden, New Zealand
Library Linked Data (Jodi Schneider, DERI)
Financial Linked Data (Sean O’Riain, DERI)
Linking Enterprise Data for Business Intelligence

30. Financial Linked Data
Linked with extracted Financial Facts (amounts) – annotated with semantic metadata
(financial meaning) according to eXtensible Business Reporting Language (XBRL)

31. Some LOD Tools ‘RDB2RDF’ - mapping relational DBs to RDF
(incl. Survey Report)
‘Silk’ (Freie Universitaet Berlin) - specify links to use in discovering relationships between LOD data items
Semantic Drupal, ‘sparqlviews’ (Lin Clark, DERI) - easy integration of Linked Data in CMS Drupal
EU Projects

32. Open LOD Issues
How to integrate new LOD into the LOD cloud – with addition of information rather than duplication?
Entity consolidation
dbpedia:JohnSmith owl:sameAs bbcmusic:JohnSmith
Vocabulary alignment
geonames:location owl:sameAs dbpedia:place
How to identify the most fitting LOD resources for a particular application/domain?
Estimate application/domain semantics
Match application/domain semantics with LOD semantics

33. LOD and Natural Language Processing
Linked Open Data
Domain/Application Semantics Y Z X
LOD vocabularies
Domain Corpus
Linked Open Data for
Domain/Application Y Z X Y1 Z1
LOD instances from domain corpus

34. Acknowledgements & Further Info
DERI colleagues on all things ‘linked open data’, for more info
The Saffron team (in alphabetical order)
Georgeta Bordea, Fergal Monaghan, Krystian Samp
Grant support
Science Foundation Ireland Grant No. SFI/08/CE/I1380 for Lion-2
EU FP7 Grant No for the Monnet project on Multilingual Ontologies for Networked Knowledge