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Introducing Wikidata to the Linked Data Web Fredo Erxleben , Michael - PowerPoint PPT Presentation

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www.tu-dresden.de Introducing Wikidata to the Linked Data Web Fredo Erxleben , Michael Gnther , Markus Krtzsch , Julian Mendez and Denny Vrandei ISWC, 21th October 2014 About Wikidata Launched on 30th October 2012 15,817,444

  1. www.tu-dresden.de Introducing Wikidata to the Linked Data Web Fredo Erxleben , Michael Günther , Markus Krötzsch , Julian Mendez and Denny Vrandečić ISWC, 21th October 2014

  2. About Wikidata ● Launched on 30th October 2012 ● 15,817,444 item pages ● 12,674 active users (state of 1st October 2014) http://www.wikidata.org 21. October 2014 Michael Günther 2

  3. 21. October 2014 Michael Günther 3

  4. About Wikidata Qualifjers Property Value Statement 21. October 2014 Michael Günther 4

  5. About Wikidata Qualifjers Property Value Statement 21. October 2014 Michael Günther 5

  6. About Wikidata Qualifjers Property Value References Statement 21. October 2014 Michael Günther 6

  7. Wikidata RDF Entities (items and properties) are represented with uniform URIs ● http://www.wikidata.org/entity/<id> 21. October 2014 Michael Günther 7

  8. Wikidata RDF Entities (items and properties) are represented with uniform URIs ● http://www.wikidata.org/entity/<id> 21. October 2014 Michael Günther 8

  9. Wikidata RDF Entities (items and properties) are represented with uniform URIs ● http://www.wikidata.org/entity/<id> 21. October 2014 Michael Günther 9

  10. Wikidata RDF Entities (items and properties) are represented with uniform URIs ● http://www.wikidata.org/entity/<id> 21. October 2014 Michael Günther 10

  11. Wikidata RDF 21. October 2014 Michael Günther 11

  12. Wikidata RDF ● Additional simple-statements dump 21. October 2014 Michael Günther 12

  13. Wikidata RDF ● Additional simple-statements dump ● Individual dumps for statements, terms and sitelinks 21. October 2014 Michael Günther 13

  14. Wikidata RDF ● Additional simple-statements dump ● Individual dumps for statements, terms and sitelinks ● Dumps about schema information 21. October 2014 Michael Günther 14

  15. Wikidata RDF ● Additional simple-statements dump ● Individual dumps for statements, terms and sitelinks ● Dumps about schema information ● IRIs Entities http://www.wikidata.org/entity/<entityID> Statements http://www.wikidata.org/entity/<entityID><UUID> Values http://www.wikidata.org/entity/V<hash> References http://www.wikidata.org/entity/R<hash> 21. October 2014 Michael Günther 15

  16. Wikidata RDF ● Additional simple-statements dump ● Individual dumps for statements, terms and sitelinks ● Dumps about schema information ● IRIs Entities http://www.wikidata.org/entity/<entityID> Statements http://www.wikidata.org/entity/<entityID><UUID> Values http://www.wikidata.org/entity/V<hash> References http://www.wikidata.org/entity/R<hash> ● OWL compatible 21. October 2014 Michael Günther 16

  17. Wikidata RDF ● Additional simple-statements dump ● Individual dumps for statements, terms and sitelinks ● Dumps about schema information ● IRIs Entities http://www.wikidata.org/entity/<entityID> Statements http://www.wikidata.org/entity/<entityID><UUID> Values http://www.wikidata.org/entity/V<hash> References http://www.wikidata.org/entity/R<hash> ● OWL compatible ● Reuse of third-party vocabulary 21. October 2014 Michael Günther 17

  18. Wikidata RDF ● Additional simple-statements dump ● Individual dumps for statements, terms and sitelinks ● Dumps about schema information ● IRIs Entities http://www.wikidata.org/entity/<entityID> Statements http://www.wikidata.org/entity/<entityID><UUID> Values http://www.wikidata.org/entity/V<hash> References http://www.wikidata.org/entity/R<hash> ● OWL compatible ● Reuse of third-party vocabulary ● Links to 17 other RDF datasets 21. October 2014 Michael Günther 18

  19. Wikidata RDF File Topic File size Triples Content 49M 11,659,628 instances rdf:type relations taxonomy 1.1M 221,300 rdfs:subclassOf relations simple-statement 478M 66,748,306 simplifjed statements statements 2.5G 191,467,639 statements terms 1.1G 119,831,832 labels, aliases, descriptions properties 1.2M 65,280 properties sitelinks 1.1G 137,858,016 sitelinks Generated with Wikidata Toolkit https://www.mediawiki.org/wiki/Wikidata_Toolkit 21. October 2014 Michael Günther 19

  20. Summary and Conclusion ● Over 500 million triples ● Generated every month ● Next steps: – Integrating more datasets – Completing Wikidata RDF service – SPARQL endpoint http://tools.wmfmabs.org/wikidata-exports/rdf 21. October 2014 Michael Günther 20

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