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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
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
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
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
Enrichtment of tag description in Stack Exchange
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> .
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
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
Outcome and Beneﬁts Show related documents guide people from communities to collections Catalog enrichment guide people from collections to communities Collection analysis
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
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