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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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Information extractors

InformationExtractors

Hassan A. Sleiman


Roadmap

RoadMap

  • Introduction

  • Comparison

  • IE Framework

  • Conclusions


We are talking about ies

Wrapper

Form Filler

Navigator

Information Extractor

Ontologiser

Verifier

We are talking about IEs


Ie in action

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
Comparison

...

...


Framework
Framework

  • IE framework.

    • Reusable.

    • Comparable results.


Roadmap1

RoadMap

Introduction

Ourwork:

Survey

Framework

Conclusions


Survey
Survey

  • 62 Information Extractors identified.

  • 43 IEs are studied.


Roadmap2

RoadMap

Introduction

Ourwork:

Survey

Framework

Conclusions


Components
Components

Preprocessor

DataSet

Resultset

Utilities

Learner

RuleSet

InfoExtractor


Tokenisation
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>


Dataset 1 2
DataSet 1/2


Dataset 2 2
DataSet 2/2



Keep in mind
Keep in mind!



Roadmap3

RoadMap

Introduction

Ourwork:

Survey

Framework

Conclusions


Conclusions
Conclusions

  • Achievements 2009:

    • Studying 43 IEs.

    • Framework Modules definition.

  • Goals for 2010:

    • IE Framework.

    • Survey.

    • Comparable IE implementations.

    • Marking tool.

    • Tokeniser.


Thanks

Thanks!

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


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