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Information Extractors

Information Extractors. Hassan A. Sleiman. RoadMap. Introduction Comparison IE Framework Conclusions. Wrapper. Form Filler. Navigator. Information Extractor. Ontologiser. Verifier. We are talking about IEs. The Da Vinci Code. Doubleday. 2006. Dan Brown. 15.95 €.

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Information Extractors

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  1. InformationExtractors Hassan A. Sleiman

  2. RoadMap • Introduction • Comparison • IE Framework • Conclusions

  3. Wrapper Form Filler Navigator Information Extractor Ontologiser Verifier We are talking about IEs

  4. The Da Vinci Code Doubleday 2006 Dan Brown 15.95 € Robert Langdon… IE in action Document • Input: • Web pages • Rules/patterns • Output: • Extracted data Extraction rules Information extractor Data

  5. Comparison ... ...

  6. Framework • IE framework. • Reusable. • Comparable results.

  7. RoadMap Introduction Ourwork: Survey Framework Conclusions

  8. Survey • 62 Information Extractors identified. • 43 IEs are studied.

  9. RoadMap Introduction Ourwork: Survey Framework Conclusions

  10. Components Preprocessor DataSet Resultset Utilities Learner RuleSet InfoExtractor

  11. Tokenisation Example: <a “href=http://example.com”> the <span> Times </span></a> • Tag & Text • <a “href=http://example.com”> the_<span>Times</span></a> • Word & No-Word • <a href=“http://example.com”> the_<span>Times</span></a> • Chars • <a href=“http://example.com”> the _<span> Times </span></a>

  12. DataSet 1/2

  13. DataSet 2/2

  14. RuleSet

  15. Keep in mind!

  16. Dataset

  17. RoadMap Introduction Ourwork: Survey Framework Conclusions

  18. Conclusions • Achievements 2009: • Studying 43 IEs. • Framework Modules definition. • Goals for 2010: • IE Framework. • Survey. • Comparable IE implementations. • Marking tool. • Tokeniser.

  19. Thanks! Seeking for a paper?Try The TDG Scholar at http://scholar.tdg-seville.info/

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