AceWiki: A Natural and Expressive Semantic Wiki

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(See paper for details: http://attempto.ifi.uzh.ch/site/pubs/papers/kuhn08acewiki.pdf )

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AceWiki: A Natural and Expressive Semantic Wiki

  1. 1. AceWiki: A Natural and Expressive Semantic Wiki Tobias Kuhn University of Zurich Semantic Web User Interaction at CHI 2008 Florence 5 April 2008
  2. 2. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 2 Introduction  Semantic Wikis  Semantic Web meets Web 2.0  Shortcomings of existing semantic wikis  Hard to understand for people who are not familiar with ontologies and logic  Relatively inexpressive (mostly just subject- predicate-object structures)
  3. 3. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 3 AceWiki approach  Wiki articles in controlled natural language  Attempto Controlled English (ACE)  Easy to understand: ACE is a subset of English  Expressive: ACE covers a large part of FOL  Example article:  Public demo: http://attempto.ifi.uzh.ch/acewiki
  4. 4. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 4 AceWiki interface
  5. 5. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 5 Predictive Editor
  6. 6. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 6 Reasoning  AceWiki currently uses the OWL reasoner Pellet  ACE is more expressive than OWL  The sentences that are inside of OWL get a blue triangle; the others get a red one  Sentences that are in conflict with the current knowledge are not included into the ontology.
  7. 7. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 7 Inferences  Reasoner is used to infer concept memberships and concept hierarchies.
  8. 8. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 8 Usability-Experiment  Hypothesis: Average people are able to learn how to deal with AceWiki within a short amount of time and without the help of an expert.  Small-scale: 20 participants  Task for the participants:  Add knowledge to AceWiki!  only true and general knowledge  modify/delete the contributions of others, if appropriate  No instructions how to interact with the interface
  9. 9. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 9 Background of the Participants  “How familiar are you with the term ...?”
  10. 10. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 10 Results: Correct/Incorrect Sentences  Altogether 186 sentences were created by the users.  148 of them were “correct and sensible”.
  11. 11. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 11 Results: Sentence Patterns  (neg.) superconcept  (neg.) assignment  (neg.) role instance  superrole
  12. 12. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 12 Results: Time  How much time was spent on AceWiki?  How much time was spent on the predictive editor?
  13. 13. Tobias Kuhn, SWUI 2008, Florence, 5 April 2008 13 Thank you for your attention! Questions & Discussion

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