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Linked Data and SKOS
 

Linked Data and SKOS

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Connecting the dots: ...

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

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    Linked Data and SKOS Linked Data and SKOS Presentation Transcript

    • Linked Data and SKOSConnecting the dots.Mag. Andreas BlumauerSemantic Web Company
    • 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 © Semantic Web Company – http://www.semantic-web.at/ 2
    • Brief introduction to Linked Data© Semantic Web Company – http://www.semantic-web.at/ 3
    • Towards a „Web of Data“ Web of Data  Hyperdata Data on the Web (OpenData) Web of Documents Hypertext © Semantic Web Company – http://www.semantic-web.at/ 4
    • From ‚Gopher‘ to ‚Super-Mashups‘© Semantic Web Company – http://www.semantic-web.at/ 5
    • reegle.info Live-Demo http://reegle.info/countries© Semantic Web Company – http://www.semantic-web.at/ 6
    • Answering questionsFind 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 © Semantic Web Company – http://www.semantic-web.at/ 7
    • How it works http://dbpedia.org/resource/Grapefruit subject: category:Flora_of_Barbados thumbnail: http://upload.wikimedia.org/...The grapefruit is asubtropical citrus http://rdf.freebase.com/rdf/en.grapefruittree first bred in vitamin_c: 0.0344g dietary_restrictions: gluten-free_dietBarbados. 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 © Semantic Web Company – http://www.semantic-web.at/ 8
    • Linked Open Data (LOD) CloudSource: http://www4.wiwiss.fu-berlin.de/lodcloud/state/ © Semantic Web Company – http://www.semantic-web.at/ 9
    • State of the Linked Data Cloud Number ofDomain Triples % (Out-)Links % datasetsMedia 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 9Source: http://www4.wiwiss.fu-berlin.de/lodcloud/state/ © Semantic Web Company – http://www.semantic-web.at/ 10
    • Core disciplines: entity extraction, disambiguation & data alignmentThe grapefruitis a subtropicalcitrus tree bredin Barbados. Context Elicitation © Semantic Web Company – http://www.semantic-web.at/ 11
    • Two main applications of linked data• Super-Mashups • Complex search queriesGrapefruit (Citrus paradisi)is a subtropical citrus tree firstbred 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 © Semantic Web Company – http://www.semantic-web.at/ 12
    • The technical perspective: data integration the classical wayData integration realised at application layer  Implicit conceptual model © Semantic Web Company – http://www.semantic-web.at/ 13
    • The technical perspective: data integration the linked data wayApplication on top of explicit conceptual model Integration on data level © Semantic Web Company – http://www.semantic-web.at/ 14
    • The business perspective: costs of data integrationSource: Price Waterhouse Coopers – Technology Forecast, Spring 2009 © Semantic Web Company – http://www.semantic-web.at/ 15
    • 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 © Semantic Web Company – http://www.semantic-web.at/ 16
    • Linked data – the next evolution of the database?Source: Fujitsu – White Paper Linked Data: March 2012 © Semantic Web Company – http://www.semantic-web.at/ 17
    • Thesaurus Management based on SKOS© Semantic Web Company – http://www.semantic-web.at/ 18
    • 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/ © Semantic Web Company – http://www.semantic-web.at/ 19
    • Example: Schools Online Thesaurus Live-Demo http://scot.curriculum.edu.au/© Semantic Web Company – http://www.semantic-web.at/ 20
    • 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 © Semantic Web Company – http://www.semantic-web.at/ 21
    • Linked Data & SKOS© Semantic Web Company – http://www.semantic-web.at/ 22
    • 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/ © Semantic Web Company – http://www.semantic-web.at/ 23
    • Publishing SKOS as Linked Data http://vocabulary.semantic-web.at/PoolParty/wiki/semweb© Semantic Web Company – http://www.semantic-web.at/ 24
    • Generate SKOS from Linked Data sources Live-Demohttp://pilot4.poolparty.biz/PoolParty/wiki/Sustainabilityhttp://vocabulary.semantic-web.at/PoolParty/wiki/cocktails © Semantic Web Company – http://www.semantic-web.at/ 25
    • Using SKOS for entity extraction & content enrichment Live-Demo http://poolparty.biz/demozonehttp://pilot4.poolparty.biz/extractor/testextractor © Semantic Web Company – http://www.semantic-web.at/ 26
    • Collaborative thesaurus management Live-Demo http://bit.ly/J16GWD© Semantic Web Company – http://www.semantic-web.at/ 27
    • SKOS & Linked data alignment (1) Live-Demohttp://open.poolparty.punkt.at/PoolParty/ © Semantic Web Company – http://www.semantic-web.at/ 28
    • SKOS & Linked data alignment (2) Live-Demo http://bit.ly/semantic_search© Semantic Web Company – http://www.semantic-web.at/ 29
    • ConclusioDownload slides: http://www.slideshare.net/semwebcompany Try PoolParty: http://poolparty.biz/try-it © Semantic Web Company – http://www.semantic-web.at/ 30
    • Contact Andreas Blumauer CEO a.blumauer@semantic- web.atSemantic Web Company GmbH http://www.semantic-web.at/Mariahilfer Strasse 70/8 http://poolparty.biz1070 Vienna http://lod2.eu/Austria http://lassoproject.org © Semantic Web Company – http://www.semantic-web.at/ 31