Linked Data and SKOS

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Linked Data and SKOS

  1. 1. Linked Data and SKOS2011 Workshop on Physics Classification, BostonNovember 28th, 2011Bernhard Haslhofer | Cornell University, Information Science
  2. 2. Linked Data2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  3. 3. Web Architecture HTML HTML HTML hyperlinks hyperlinks2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  4. 4. But sometimes we need programmatic access the underlying content, metadata, and vocabularies.2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  5. 5. Web APIs API API API API API2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  6. 6. Web APIs - Drawbacks • Each Web API has a proprietary interface • Datasources must be known in advance • Information entities (papers, authors, subjects, etc.) are not linked2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  7. 7. Linked Open Data Vision • Publish and link structured data on the Web • Create a single global data space based on the Architecture of the World Wide Web RDF RDF RDF RDF links RDF links2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  8. 8. Linked Data Example http://xmlns.com/foaf/ spec/#term_Person N. M. R. Peres ... rdf:type http://purl.org/ontology/ bibo/Article foaf:name http://arxiv.org/authors/ http://aps.org/authors/ owl:sameAs Peres_N peres_nmr rdf:type dcterms:creator dcterms:creator http://arxiv.org/resource/ http://prb.aps.org/resource/ owl:sameAs cond-mat/0512091 PRB/v73/i12/e125411 dc:title ... Electronic Properties of Disordered Two-Dimensional Carbon2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  9. 9. Publishing Linked Data • Distinguish between non-information (NIR) and information resource (IR) • Sample NIR • http://arxiv.org/resource/cond-mat/0512091 • Sample IRs • http://arxiv.org/abs/cond-mat/0512091 (HTML) • http://arxiv.org/data/cond-mat/0512091 (RDF)2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  10. 10. The Simple Knowledge Organization System (SKOS)2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  11. 11. What is SKOS? • A language for describing controlled vocabularies (taxonomies, classification schemes, thesauri) • Builds on Linked Data principles2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  12. 12. SKOS Examples skos:Concept rdf:type arxiv:cond-mat @prefix skos: <http://www.w3.org/2004/02/skos/core#> . @prefix arxiv: <http://arxiv.org/subjects/> .2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  13. 13. SKOS Examples "Condensed Matter Physics"@en skos:prefLabel skos:Concept "Kondensierte Materie skos:prefLabel arxiv:cond-mat Physik"@de skos:altLabel "Physics"@en2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  14. 14. SKOS Examples skos:broader skos:Concept "Condensed Matter skos:prefLabel arxiv:cond-mat Physics"@en skos:narrower skos:broader skos:Concept "Physics - Statistical skos:prefLabel arxiv:cond-mat.stat-mech Mechanics"@en skos:narrower2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  15. 15. SKOS Example skos:broader skos:Concept ... skos:Concept skos:related arxiv:cond-mat skos:narrower skos:closeMatch dbpedia: Condensed_matter_ physics2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  16. 16. SKOS Examples ex1:someConceptScheme ex2:otherConceptScheme skos:Concept skos:Concept arxiv:cond-mat aps:.... skos:exactMatch skos:Concept skos:broadMatch skos:Concept arxiv:physics.data- aps:.... an2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011
  17. 17. Summary • Linked Data is about exposing and linking structured data on the Web • SKOS is a language for expressing controlled vocabularies • SKOS vocabularies can be published as Linked Data2011 Workshop on Physics Classification | Boston, MA | Nov. 28th, 2011

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