Connecting the dots: * Publishing SKOS thesauri as linked data * Generate SKOS from LOD sources * Usage of SKOS thesauri for entity extraction & content enrichment from LOD sources * Use linked data mechanisms for collaborative thesaurus management * Usage of SKOS for linked data alignment & disambiguation

1. Linked Data and SKOS
Connecting the dots.
Mag. Andreas Blumauer
Semantic Web Company

2. Agenda
• Brief introduction to Linked Data
• Very brief introduction to SKOS based Thesaurus
Management
• Linked Data & SKOS
1. Publishing SKOS thesauri as linked data
2. Generate SKOS from LOD sources
3. Usage of SKOS thesauri for entity extraction
& content enrichment from LOD sources
4. Use linked data mechanisms for collaborative thesaurus
management
5. Usage of SKOS for linked data alignment & disambiguation
• Conclusio
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3. Brief introduction to
Linked Data
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4. Towards a „Web of Data“
Web of Data  Hyperdata
Data on the Web (Open
Data)
Web of Documents 
Hypertext
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5. From ‚Gopher‘ to ‚Super-Mashups‘
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6. reegle.info
Live-Demo
http://reegle.info/countries
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7. Answering questions
Find drugs
- related to asthma
- that are linked to a curated molecular interaction in the literature
- where the protein is known to cause inflammatory response
dbpedia:Protein_XY dbpedia:Asthma Molecule_Interaction_Z24
caused by contains treats related topic
bio:Inflammation Drug:Auranofin pubed:Paper4018
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8. How it works
http://dbpedia.org/resource/Grapefruit
subject: category:Flora_of_Barbados
thumbnail: http://upload.wikimedia.org/...
The grapefruit is a
subtropical citrus http://rdf.freebase.com/rdf/en.grapefruit
tree first bred in vitamin_c: 0.0344g
dietary_restrictions: gluten-free_diet
Barbados. diets_that_like_this: grapefruit_diet
http://sws.geonames.org/3374084/
child of: http://sws.geonames.org/6255149/
parent of: http://sws.geonames.org/3373557/
long: 59.53
lat: 13.16
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9. Linked Open Data (LOD) Cloud
Source: http://www4.wiwiss.fu-berlin.de/lodcloud/state/
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10. State of the Linked Data Cloud
Number of
Domain Triples % (Out-)Links %
datasets
Media 25 1,841,852,061 5.82 % 50,440,705 10.01 %
Geographic 31 6,145,532,484 19.43 % 35,812,328 7.11 %
Government 49 13,315,009,400 42.09 % 19,343,519 3.84 %
Publications 87 2,950,720,693 9.33 % 139,925,218 27.76 %
Cross-domain 41 4,184,635,715 13.23 % 63,183,065 12.54 %
Life sciences 41 3,036,336,004 9.60 % 191,844,090 38.06 %
User-generated
20 134,127,413 0.42 % 3,449,143 0.68 %
content
503,998,82
295 31,634,213,770
9
Source: http://www4.wiwiss.fu-berlin.de/lodcloud/state/
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11. Core disciplines: entity extraction,
disambiguation & data alignment
The grapefruit
is a subtropical
citrus tree bred
in Barbados.
Context Elicitation
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12. Two main applications of linked data
• Super-Mashups • Complex search queries
Grapefruit (Citrus paradisi)
is a subtropical citrus tree first
bred in Barbados.
• Which other fruits provide a
comparable amount of vitamin C
like grapefruits do?
Dietary restrictions
•Gluten-free diet • Which country produces the most
•Vegetarian
•Veganism
grapefruits per capita?
Top Producers
•USA
• What is the relation between
•China grapefruits and Georgian wine?
•South Africa
Other plants from
Barbados
•Coconut
•Matico
•Grandleaf Seagrape
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13. The technical perspective:
data integration the classical way
Data integration realised at application layer
 Implicit conceptual model
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14. The technical perspective:
data integration the linked data way
Application on top of explicit conceptual model
Integration on data level
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15. The business perspective:
costs of data integration
Source: Price Waterhouse Coopers – Technology Forecast, Spring 2009
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16. Linked Data: Use Cases
1.
3.
1. Linked Data for
internal data
integration
3. Linked Data
Consuming
2.
5. Linked Data
Publishing
7. Combine 1, 2, 3
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17. Linked data –
the next evolution of the database?
Source: Fujitsu – White Paper Linked Data: March 2012
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18. Thesaurus Management
based on SKOS
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19. SKOS stands for ‚Simple Knowledge
Organization System‘
• W3C Standard
since 2009
• Based on Semantic
Web standards
• Open for linking with
additional linked data
http://www.w3.org/2004/02/skos/
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20. Example: Schools Online Thesaurus
Live-Demo
http://scot.curriculum.edu.au/
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21. SKOS stands for ‚Simple Knowledge
Organization System‘
2.
4.
1. 3.
5.
1. Each concept in one or many concept schemes
2. Each concept has one URI
3. Each concept has one ore more labels
4. (Poly-)Hierarchical and non-hierachical relations
5. Matching between concepts from various sources
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22. Linked Data & SKOS
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23. Usage of SKOS in the
linked open data cloud
1. Thesauri like
• TheSoz (GESIS)
31% • STW (Leibniz)
• GBA (Geological Survey, A)
• …
27%
3. SKOS ‚fragments‘ like in
22% • DBPedia (categories)
• New York Times Dataset
• …
Source: http://www4.wiwiss.fu-berlin.de/lodcloud/state/
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24. Publishing SKOS as Linked Data
http://vocabulary.semantic-web.at/PoolParty/wiki/semweb
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25. Generate SKOS from
Linked Data sources
Live-Demo
http://pilot4.poolparty.biz/PoolParty/wiki/Sustainability
http://vocabulary.semantic-web.at/PoolParty/wiki/cocktails
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26. Using SKOS for entity extraction
& content enrichment
Live-Demo
http://poolparty.biz/demozone
http://pilot4.poolparty.biz/extractor/testextractor
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27. Collaborative thesaurus management
Live-Demo
http://bit.ly/J16GWD
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28. SKOS & Linked data alignment (1)
Live-Demo
http://open.poolparty.punkt.at/PoolParty/
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29. SKOS & Linked data alignment (2)
Live-Demo
http://bit.ly/semantic_search
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30. Conclusio
Download slides: http://www.slideshare.net/semwebcompany
Try PoolParty: http://poolparty.biz/try-it
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31. Contact
Andreas Blumauer
CEO
a.blumauer@semantic-
web.at
Semantic Web Company GmbH http://www.semantic-web.at/
Mariahilfer Strasse 70/8 http://poolparty.biz
1070 Vienna http://lod2.eu/
Austria
http://lassoproject.org
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