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Linking Folksonomies to Knowledge Organization Systems
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Linking Folksonomies to Knowledge Organization Systems

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Presentation at Metadata and Semantic Research (MTSR), November 30th, 2012.

Presentation at Metadata and Semantic Research (MTSR), November 30th, 2012.

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  • 1. Linking Folksonomies to Knowledge Organization Systems Jakob Voß (VZG) Metadata and Semantic Research (MTSR), November 30th, 2012
  • 2. Social Tagging and FolksonomiesWikipedia and Stack ExchangeLinking Folksonomies to KOSResults
  • 3. Section 1Social Tagging and Folksonomies
  • 4. Social Tagging Keywords/tags manually assigned to documents by members of a distributed community of volunteers Tags freely chosen (or easy to create new) Outcome of tagging activity in a tagging system: Folksonomy
  • 5. Properties of Social Tagging Tagging systems are very dynamic — especially compared to normal KOS Different types of tagging systems exist: — don’t compare apples and oranges! source of resources tagging rights, tagging support, tag management tag aggregation tag connectivity
  • 6. Tag aggregation: Bag-Model
  • 7. Tag aggregation: Bag-Model
  • 8. Tag aggregation: Set-Model
  • 9. Tag aggregation: Set-Model
  • 10. Folksonomies in set-model tagging systems Dynamic knowledge organization systems created by communities of distributed volunteers Directly given as snapshot of community consensus Limited awareness among community members Two popular examples: Categories in Wikipedia Tags in Stack Exchange
  • 11. Section 2Wikipedia and Stack Exchange
  • 12. Categories in Wikipedia
  • 13. folksonomy is a thesaurus
  • 14. Tags in Stack Exchange tags in a question anyone can edit tags (after a while) folksonomy is a flat file of keywords (with some synonyms)
  • 15. Section 3Linking Folksonomies to KOS
  • 16. Knowledge Organization Systems (KOS) Classifications, thesauri, taxonomies, authority files. . . Common model of KOS for exchange and interlinking: Simple Knowledge Organization System (SKOS): <http://example.org/a> a skos:Concept ; skos:broader <http://example.org/b> ; skos:narrower <http://example.org/c> ; skos:related <http://example.org/d> ; skos:exactMatch <http://example.com/A> ; skos:closeMatch <http://example.com/aa> .
  • 17. Harvest and SKOSify folksonomy
  • 18. Additional links from tag names Reuse of Computing Research Repository (CoRR) notations
  • 19. Mapping to CoRR classification @prefix cst: <http://cstheory.stackexchange.com/tags/> . [ skos:notation "LO"; skos:prefLabel "Logic in Computer Science"@en ] skos:closeMatch cst:lo.logic . [ skos:notation "DS" ; skos:prefLabel "Data Structures and Algorithms"@en ] skos:narrowMatch cst:ds.algorithms , cst:ds.data-structures .
  • 20. Feedback of enrichment and links into the community
  • 21. Enrichtment of tag description in Wikipedia
  • 22. Enrichtment of tag description in Wikipedia <http://de.dbpedia.org/resource/Kategorie:H%C3%B6rspiel> a skos:Concept ; skos:prefLabel "H¨rspiel"@de ; o skos:narrowMatch <http://data.bib.uni-mannheim.de/data/rvk/AP_36320> , <http://data.bib.uni-mannheim.de/data/rvk/EC_7980> ; skos:closeMatch <http://dewey.info/class/791.447/> , # DDC <http://d-nb.info/gnd/4025435-5> . # GND
  • 23. Enrichtment of tag description in Stack Exchange
  • 24. Enrichtment of tag description in Stack Exchange @prefix libse: <http://libraries.stackexchange.com/tags/> libse:ils a skos:Concept ; skos:broader libse:software ; skos:narrower libse:circulation> , libse:collection-management , libse:cataloging> , libse:opac ; skos:closeMatch <http://dbpedia.org/resource/Integrated_library_system> <http://id.loc.gov/authorities/subjects/sh95003216> , <http://eprints.rclis.org/handle/10760/3775> , <http://d-nb.info/gnd/4583297-3> .
  • 25. Feedback of enrichment and links into the community Feedback with additional benefit: find related documents One must be able to directly link to a rich collected of documents indexed with the concept notation/identifier of each KOS
  • 26. Section 4 Results
  • 27. hierarchical links
  • 28. Mappings to other KOS Published in SKOS/RDF as shown Simple mappings in form of BEACON files #PREFIX: http://libraries.stackexchange.com/tags/ #RELATION: http://www.w3.org/2004/02/skos/core#closeMatch ils|http://dbpedia.org/resource/Integrated_library_system ils|http://id.loc.gov/authorities/subjects/sh95003216 ils|http://eprints.rclis.org/handle/10760/3775 ils|http://d-nb.info/gnd/4583297-3 archives|http://eprints.rclis.org/handle/10760/3660
  • 29. Outcome and Benefits Show related documents guide people from communities to collections Catalog enrichment guide people from collections to communities Collection analysis
  • 30. Compare collections with measuring at one KOS Collection of papers at arXiv.org compared to question at theoretical computer science Stack Exchange: complexity theory is asked much more then published information theory is published much more then asked about
  • 31. References Scripts and data harvested available at http://github.com/nichtich/se2skos. Source of paper and slides available at http://github.com/jakobib/mtsr2012. Both Wikipedia and Stack Exchange data available under CC-BY-SA accessible via open APIs: http://stackapps.com/ http://en.wikipedia.org/w/api.php Icons CC-BY based on picol.org