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Linked Data Version of Dewey Decimal Classification Now Available in Multiple Languages

The Dewey Decimal Classification (DDC) has launched an experimental space for linked data, providing access to the top three levels of the DDC in ten languages. This new version includes actionable URIs for each class, encoded classification semantics in SKOS, and data representations for both machines and humans. The data is reusable under a Creative Commons BY-NC-ND license, facilitating easy access and integration. The resource is designed for web lookups and offers enhanced geographic information retrieval capabilities through linked geographic data.

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Linked Data Version of Dewey Decimal Classification Now Available in Multiple Languages

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  1. Dewey.info Update • Dewey Breakfast/Update • ALA Midwinter • January 16, 2010 • Michael Panzer

  2. http://dewey.info • Experimental space for linked DDC data • Available now: Linked data version of the DDC Summaries in ten languages • Features include: • Access to the top three levels of the DDC in ten languages • Actionable URIs for every class of the DDC Summaries • Classification semantics encoded in SKOS • Representations for machines and for humans • Data is reusable under a Creative Commons BY-NC-ND license

  3. Linked Open Data cloud

  4. Requirements for publishing Linked Data • Identification • Every data entity has a URI • Access • HTTP as protocol (established infrastructure: WWW) • User agent indicates which data formats it accepts • Representation • for machines • RDF as data model • SKOS, Dublin Core, ccREL, etc. as vocabularies • for humans • HTML, etc. • “Openness” of the data set

  5. Use Case: Basic web lookup • “If someone has the URI of that thing, what relationships to what other objects is it useful to know about?”(Tim Berners-Lee) • A web page for every class of the Dewey Summaries, e.g.: • <http://dewey.info/class/641/>

  6. Demo: dewey.info • http://dewey.info/class/641/ • http://dewey.info/class/641/about.rdf • http://dewey.info/class/641/about.en • http://dewey.info/class/641/about.sv • http://dewey.info/class/641/2009/08/about.ar.html • http://dewey.info/class/641/2009/08/about.ar.rdf

  7. Use Case: Shelf labels as display alternative http://worldcat.org/search?q=dd:641+yr:2009 http://dewey.info/class/641/ http://dewey.info/class/641/about.es http://dewey.info/class/641/about.en

  8. Use Case: Shelf labels as display alternative http://worldcat.org/search?q=dd:734+yr:2009 http://dewey.info/class/734/ http://dewey.info/class/734/about.zh http://dewey.info/class/734/about.en

  9. Coming Soon ... • More languages • More data • Table 2 with links to FAST headings / GeoNames • Abridged 14 • German DDC 22 data • Agreement between Deutsche Nationalbibliothek and OCLC to make numbers, captions, and more of full DDC 22 available under Creative Commons

  10. Geocoding? • Adding geographic coordinates from other (geographic) data • Coordinates are added to Dewey classes in Table 2 • Example • AustraliaT2—943 Queensland: -20.0,145.0 • OhioT2—77156 Franklin County: 39.966731,-83.0165727[+39° 58', -83° 1'] • Useful for geographic information retrieval (spatial queries) in combination with new 085 fields

  11. T2—94 Australia displayed with Google Earth

  12. NYT articles dewey.info Tacoma (Wash) http://data.nytimes.com/N51488338864578420851 T2—797788 Tacoma NYT http://dewey.info/class/2--797788/ Geo-Names http://sws.geonames.org/5812944/ Linking Open Data example: New York Times

  13. Thank you! What other data would you like to see? In what way, shape, or format? Other comments, suggestions? panzerm@oclc.org

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