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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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InformationExtractors 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 € Robert Langdon… IE in action Document • Input: • Web pages • Rules/patterns • Output: • Extracted data Extraction rules Information extractor Data
Comparison ... ...
Framework • IE framework. • Reusable. • Comparable results.
RoadMap Introduction Ourwork: Survey Framework Conclusions
Survey • 62 Information Extractors identified. • 43 IEs are studied.
RoadMap Introduction Ourwork: Survey Framework Conclusions
Components Preprocessor DataSet Resultset Utilities Learner RuleSet InfoExtractor
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>
RoadMap Introduction Ourwork: Survey Framework Conclusions
Conclusions • Achievements 2009: • Studying 43 IEs. • Framework Modules definition. • Goals for 2010: • IE Framework. • Survey. • Comparable IE implementations. • Marking tool. • Tokeniser.
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