ca.uottawa.balie

Class NamedEntityRecognitionNerfEXT

java.lang.Object

ca.uottawa.balie.NamedEntityRecognition

ca.uottawa.balie.NamedEntityRecognitionNerfEXT

public class NamedEntityRecognitionNerfEXT
extends ca.uottawa.balie.NamedEntityRecognition

NER extended with NERF disambiguation rules.
NERF (Named Entity Recognition Framework) is an semi-supervised NER system made of generated Named Entity lists and disambiguation rules.
It is based on baseline system by:

 Nadeau, D., Turney, P. D. and Matwin, S. (2006) Unsupervised Named-Entity Recognition: Generating Gazetteers and Resolving Ambiguity.
 Proc. Canadian Conference on Artificial Intelligence.
 

NERF can handle the 200 NE types as defined in the Sekine Hierarchy:

 Sekine, S., Sudo, K. and Nobata, C. (2002) Extended Named Entity Hierarchy.
 Proc. International Conference on Language Resources and Evaluation.
 

Author:

David Nadeau (pythonner@gmail.com)

Field Summary

Fields

Modifier and Type	Field and Description
Map<Integer,Double>	map

Fields inherited from class ca.uottawa.balie.NamedEntityRecognition

m_DesiredEntities, m_Lexicon, m_TagSetSize, m_TokenList

Constructor Summary

Constructors

Constructor and Description
NamedEntityRecognitionNerfEXT(ca.uottawa.balie.TokenList pi_TokenList, ca.uottawa.balie.LexiconOnDiskI pi_Lexicon, ca.uottawa.balie.DisambiguationRulesI pi_Rules, ca.uottawa.balie.PriorCorrectionI pi_Prior, ca.uottawa.balie.NamedEntityTypeEnumI[] pi_Mapping, boolean pi_FullDebug)

Method Summary

Modifier and Type	Method and Description
protected void	ApplyDisambiguation()
protected void	ExtendEntityExt(int pi_StartIndex, ca.uottawa.balie.Token pi_FirstBoundary, ca.uottawa.balie.Token pi_NewEnd, ca.uottawa.balie.NamedEntityType pi_NewType)
protected boolean	IsEntityCounterExample(ca.uottawa.balie.NamedEntityType pi_EntityType)

Methods inherited from class ca.uottawa.balie.NamedEntityRecognition

GetTokenList, RecognizeEntities

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

map

public Map<Integer,Double> map

Constructor Detail

NamedEntityRecognitionNerfEXT

public NamedEntityRecognitionNerfEXT(ca.uottawa.balie.TokenList pi_TokenList,
                                     ca.uottawa.balie.LexiconOnDiskI pi_Lexicon,
                                     ca.uottawa.balie.DisambiguationRulesI pi_Rules,
                                     ca.uottawa.balie.PriorCorrectionI pi_Prior,
                                     ca.uottawa.balie.NamedEntityTypeEnumI[] pi_Mapping,
                                     boolean pi_FullDebug)

Method Detail

ApplyDisambiguation

protected void ApplyDisambiguation()

Specified by:

ApplyDisambiguation in class ca.uottawa.balie.NamedEntityRecognition

ExtendEntityExt

protected void ExtendEntityExt(int pi_StartIndex,
                               ca.uottawa.balie.Token pi_FirstBoundary,
                               ca.uottawa.balie.Token pi_NewEnd,
                               ca.uottawa.balie.NamedEntityType pi_NewType)

IsEntityCounterExample

protected boolean IsEntityCounterExample(ca.uottawa.balie.NamedEntityType pi_EntityType)

Specified by:

IsEntityCounterExample in class ca.uottawa.balie.NamedEntityRecognition