Semantic Wikipedia The missing links - PowerPoint PPT Presentation

denny vrande i aifb universit t karlsruhe th semantics 2006 vienna november 28th 2006 n.
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Semantic Wikipedia The missing links PowerPoint Presentation
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  1. Denny Vrandečić AIFB, Universität Karlsruhe (TH) Semantics 2006 Vienna, November 28th, 2006 Semantic WikipediaThe missing links

  2. Universal Access to All Knowledge

  3. Universal Access to All Knowledge

  4. Marrying Wikipedia and the Semantic Web

  5. Overview • Background • Wikis, Wikipedia, and the Semantic Web • Semantic Wikipedia • Idea, How it looks like, Advantages • Challenges and Opportunities • Web ecosystem, Open issues, Next steps

  6. Wikis

  7. Long, long time ago… Using Pattern Languages for Object Oriented Programming, OOPSLA87

  8. Design Patterns

  9. Design Patterns Web Page HTML Simple Syntax HTML HTML

  10. Wikis • Everyone can edit • Technology allows to edit • Syntax is easy to learn • History of edits • Recent changes • Community building / Attribution • Easy to revert • Important for fighting vandalism • No fear of breaking the system

  11. Wikipedia

  12. A new encyclopedia

  13. Created March 2000 • Free, web based encyclopedia • Everyone can read • Expert authors and editors • Extensive formal peer review • Until January 2001: 22 articles • Side project: wiki-based Nupedia

  14. Created March 2000 • Free, web based encyclopedia • Everyone can read • Expert authors and editors • Extensive formal peer review • Until January 2001: 22 articles • Until January 2002: 20,342 articles in 17 languages, 17,307 in English January 2001 edit 31

  15. Wikipedia growth

  16. Wikipedia growth

  17. Wikipedia growth

  18. Wikipedia growth

  19. Wikipedia growth

  20. Wikipedia growth

  21. Wikipedia users • 2.7 Mio registered users • About 70,000 contributors • 2% (1,400) make 73.4% of all edits • Most content from wide user base • Clean up / “gardening” by small group [English Wikipedia, study by Aaron Swartz]

  22. Wikipedia’s problems

  23. But it can’t work! • Everyone can edit • Repairing is easier than breaking • No special status for experts • Community building • Nature study on quality • 4 / 3 error rate Wikipedia / EB • Controversial

  24. Quality • Hard to discover factual errors • Focusing on quality • Repeated facts • Big number of lists • But still not all “interesting” lists

  25. Coverage by language • English: 1.5 Mio • German: 0.5 Mio • 10 more languages: 100.000+ • 40 more languages: 10.000+ • But what about other languages?

  26. Semantic Web

  27. located in Africa Angola located in Continent borders Country Zambia