Diversiweb2011 03 Towards a Knowledge Diversity Model - Denny Vrandecic

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Diversiweb2011 03 Towards a Knowledge Diversity Model - Denny Vrandecic

  1. 1. Towards a Knowledge Diversity ModelRakebul Hasan, Fabian Flöck, Katharina Siorpaes, and Reto Krummenacher Slides: Denny Vrandečić and Elena Simperl DiversiWeb @ WWW2011 March 28, 2011, Hyderabad
  2. 2. Collaboration on the Web is broken
  3. 3. Wikipedia and diversityo Lemma selection level • Do you want an article for each and every „The Simpsons“ episode?  Depending on your decision  your audience will change  your author pool will change  the perception of your project will changeo Is the number of „members of Muslim faith“ identical in • The Arab language Wikipedia • The Hebrew language Wikipedia • The English language Wikipediao Will borders be described differently in various Wikipedia language editions?
  4. 4. Diversity support for wikis
  5. 5. Diversity-enhanced Web Diversity-enabled Web applicationsDiversity-enabled collaboration technology Wiki platform Blogging platform Micro-blogging platformFormal model for diversity information and information retrieval algorithms Models , lightweight Search, selection Presentation Summarization reasoning and ranking and interfacesAlgorithms for mining diversity from text Opinion Multilinguality Bias in media Fact coverage Story links detectionData management infrastructure Annotation, integration,Blogs News Twitter Wikipedia LOD linking
  6. 6. Diversity modelo Captures all notions related to diversity-enabled information management in a machine-understandable ontologyo Based on established upper-level ontologies and models in information scienceo Core concepts
  7. 7. Knowledge diversity glossary (paper)o Agent o Metadatao Belief o Objecto Bias o Objectivityo Data o Object featureo Diversity o Opiniono Emotion o Opinion expressiono Entity o Opinion holdero Event o Polarity of opiniono Fact o Sentimento Information o Subjectivityo Information object o Texto Knowledge o Topic 7
  8. 8. Core conceptso Agents holds opinions on a topico Topics can be everythingo A Document is an information object containing opinion expressionso Opinion and opinion expressiono Bias of an agent or document is the set of opinions expressed by the agent or in the documento Diversity is the co-existence of biases for a topic
  9. 9. Core conceptso Agents holds opinions on a o Examples topic • editor of wiki articleo Topics can be everything • journalisto A Document is an • publisher information object containing • blogger… opinion expressions o Agents are associated witho Opinion and opinion additional metadata expression • basic metadatao Bias of an agent or document is the set of • social network opinions expressed by the • history of publication agent or in the documento Diversity is the co-existence of biases for a topic
  10. 10. Core conceptso Agents holds opinions on a o Examples topic • of a wiki articleo Topics can be everything • of a news storyo A Document is an o Topics can be related to each information object containing other and aggregated opinion expressions o Choice of a reference topico Opinion and opinion ontology would lead to biases expression • No commitment to oneo Bias of an agent or topic ontology document is the set of opinions expressed by the agent or in the documento Diversity is the co-existence of biases for a topic
  11. 11. Core conceptso Agents holds opinions on a o Example topic • articleo Topics can be everything • news storyo A Document is an • tweet information object containing • blog post… opinion expressions o Documents are associatedo Opinion and opinion with basic metadata expression o Diversity mining algorithmso Bias of an agent or operate on documents to document is the set of identify opinions opinions expressed by the agent or in the documento Diversity is the co-existence of biases for a topic
  12. 12. Core conceptso Agents holds opinions on a o Opinion expression is the topic actual representation of ano Topics can be everything opinion in a documento A Document is an o Beyond simple sentiment information object containing analysis opinion expressions • Not just positive, negative,o Opinion and opinion neutral expression • e.g. “Palestine is ao Bias of an agent or country” document is the set of opinions expressed by the agent or in the documento Diversity is the co-existence of biases for a topic
  13. 13. Core conceptso Agents holds opinions on a o Bias lies in the selection of topic opinion expessionso Topics can be everything o Algorithms can be devisedo A Document is an that predict a bias from information object containing previous history of opinion opinion expressions expressions and to calculateo Opinion and opinion relationships between biases expressiono Bias of an agent or document is the set of opinions expressed by the agent or in the documento Diversity is the co-existence of biases for a topic
  14. 14. Core conceptso Agents holds opinions on a topico Topics can be everythingo A Document is an information object containing opinion expressionso Opinion and opinion expressiono Bias of an agent or document is the set of opinions expressed by the agent or in the documento Diversity is the co-existence of biases for a topic
  15. 15. Example: Chocolate Bias Chocolate is healthy requires defines Diversity Opinions on Opinion Opinion expresses Chocolate healthiness expression of chocolate lowers “Chocolate lowers cholesterol cholesterol” holds Agentcontains User: about author Equinox Document Topic ChocolateWikipedia: Chocolate about
  16. 16. Next stepso Representation in OWLo Grounding in existing ontologies • DOLCE, SKOS, Dublin Core, SPARo Fill the concepts with life / datao Definition of APIs to access diversity- enriched data
  17. 17. Summaryo Agents holds opinions on a topico Topics can be everythingo A Document is an information object containing opinion expressionso Opinion and opinion expressiono Bias of an agent or document is the set of opinions expressed by the agent or in the documento Diversity is the co-existence of biases for a topic

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