Information extractors
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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

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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>


DataSet 1/2


DataSet 2/2


RuleSet


Keep in mind!


Dataset


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.


Thanks!

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