opennlp.tools.coref.resolver
Class CommonNounResolver

java.lang.Object
  opennlp.tools.coref.resolver.AbstractResolver
      opennlp.tools.coref.resolver.MaxentResolver
          opennlp.tools.coref.resolver.CommonNounResolver

All Implemented Interfaces:

Resolver

public class CommonNounResolver
extends MaxentResolver

Resolves coreference between common nouns.

Field Summary

Fields inherited from class opennlp.tools.coref.resolver.MaxentResolver

DEFAULT, DIFF, nonReferentialResolver, pairedSampleSelection, preferFirstReferent, SAME, useSameModelForNonRef

Fields inherited from class opennlp.tools.coref.resolver.AbstractResolver

distances, numEntitiesBack, numSentencesBack, showExclusions

Constructor Summary

CommonNounResolver(java.lang.String projectName, ResolverMode m)

CommonNounResolver(java.lang.String projectName, ResolverMode m, NonReferentialResolver nrr)

Method Summary

boolean	canResolve(MentionContext mention) Returns true if this resolver is able to resolve the referening experession of the same type as the specified mention.
protected boolean	excluded(MentionContext ec, DiscourseEntity de) Excludes entities which you are not compatible with the entity under consideration.
protected java.util.List	getFeatures(MentionContext mention, DiscourseEntity entity) Returns a list of features for deciding whether the specificed mention refers to the specified discourse entity.

Methods inherited from class opennlp.tools.coref.resolver.MaxentResolver

defaultReferent, definiteArticle, getContextFeatures, getDistanceFeatures, getMentionCountFeature, getPronounMatchFeatures, getStringMatchFeatures, getWordFeatures, loadAsResource, loadAsResource, resolve, retain, setSimilarityModel, train

Methods inherited from class opennlp.tools.coref.resolver.AbstractResolver

featureString, getHead, getHeadIndex, getHeadString, getNumEntities, getNumEntities, getPronounGender, outOfRange, setNumberSentencesBack, stripNp

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonNounResolver

public CommonNounResolver(java.lang.String projectName,
                          ResolverMode m)
                   throws java.io.IOException

Throws:

java.io.IOException

CommonNounResolver

public CommonNounResolver(java.lang.String projectName,
                          ResolverMode m,
                          NonReferentialResolver nrr)
                   throws java.io.IOException

Throws:

java.io.IOException

Method Detail

getFeatures

protected java.util.List getFeatures(MentionContext mention,
                                     DiscourseEntity entity)

Description copied from class: MaxentResolver

Returns a list of features for deciding whether the specificed mention refers to the specified discourse entity.

Overrides:

getFeatures in class MaxentResolver

Parameters:

mention - the mention being considers as possibly referential.

entity - The disource entity with which the mention is being considered referential.

Returns:

a list of features used to predict reference between the specified mention and entity.

canResolve

public boolean canResolve(MentionContext mention)

Description copied from interface: Resolver

Returns true if this resolver is able to resolve the referening experession of the same type as the specified mention.

Parameters:

mention - The mention being considered for resolution.

Returns:

true if the resolver handles this type of refering expression, false otherwise.

excluded

protected boolean excluded(MentionContext ec,
                           DiscourseEntity de)

Description copied from class: AbstractResolver

Excludes entities which you are not compatible with the entity under consideration. The default implementation excludes entties whose last extent contatins the extent under consideration. This prevents posessive pronouns from refering to the noun phrases they modify and other undesireable things.

Overrides:

excluded in class MaxentResolver

Parameters:

ec - The mention which is being considered as referential.

de - The entity to which the mention is to be resolved.

Returns:

true if the entity should be excluded, false otherwise.