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LOD2: State of Play WP3B - Knowledge Extraction, NLP2RDF + NIF

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LOD2 plenary meeting in Paris: presentation of WP3B: State of Play (Knowledge Extraction, NLP2RDF + NIF) by Sebastian Hellmann (ULEI).

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LOD2: State of Play WP3B - Knowledge Extraction, NLP2RDF + NIF

  1. 1. Creating Knowledge out of Interlinked Data D3.1.1 - Knowledge Extraction D3.2.1 - NLP2RDF + NIF Sebastian Hellmann AKSW, Universität LeipzigLOD2 Presentation . 02.09.2010 . Page http://lod2.eu
  2. 2. Creating Knowledge out of Interlinked DataD 3.1.1 Knowledge Extraction from Structured Sources • Results of the Deliverable (1): • Definition of Knowledge Extraction on Wikipedia (Provide an easy entry point for interested users)LOD2 Event . 06.09.2010 . 2Page 2 http://lod2.eu
  3. 3. Distinction to Information Extraction and ETL and Ontology LearningHow can we define Knowledge? 3
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  5. 5. Creating Knowledge out of Interlinked DataD 3.1.1 Knowledge Extraction from Structured Sources • Results of the Deliverable (2): • Tool Server on http://data.lod2.eu/2011/tools/ • Survey available at http://tinyurl.com/KETSurveyLOD2 Event . 06.09.2010 . 5Page 5 http://lod2.eu
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  9. 9. Creating Knowledge out of Interlinked DataD 3.1.1 Knowledge Extraction from Structured Sources • Integration of Knowledge Extraction tools is done over the format RDF and reusing vocabulariesLOD2 Event . 06.09.2010 . 9Page 9 http://lod2.eu
  10. 10. Creating Knowledge out of Interlinked DataD 3.2.1 NLP2RDF + NIF NLP2RDF + NIF • Vision: Integration of NLP tools based on an Ontological Interface • String Ontology • Structured Sentence Ontology • OLiA • POWLA • NLP Interchange Format(NIF) allows NLP tools to interoperate • NLP2RDF provides a reference implementationLOD2 Event . 06.09.2010 . 10 Page 10 http://lod2.eu
  11. 11. Creating Knowledge out of Interlinked DataD 3.2.1 NLP2RDF + NIF • Basic idea: adress Strings with URIs • Use the expressiveness and flexibility of RDF to add arbitrary annotations • Several formats: • NIF-OWL • NIF-RDFa • NIF-POWLALOD2 Event . 06.09.2010 . 11 Page 11 http://lod2.eu
  12. 12. Creating Knowledge out of Interlinked DataD 3.2.1 NLP2RDF + NIF •LOD2 Event . 06.09.2010 . 12 Page 12 http://lod2.eu
  13. 13. Creating Knowledge out of Interlinked DataD 3.2.1 NLP2RDF + NIF • Due End of April • Iterations: Design and Implementations followed by Feedback • All information on http://aksw.org/Projects/NIF • First Round (NIF Web Services): • OpenCalais • DBpedia Spotlight • Gate • Stanford Parser (POS Tags) • LemmatizerLOD2 Event . 06.09.2010 . 13 Page 13 http://lod2.eu
  14. 14. Creating Knowledge out of Interlinked Data Thank you for your attention!LOD2 Presentation . 02.09.2010 . Page http://lod2.eu

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