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(String projectName, ResolverMode m)

CommonNounResolver(String projectName, ResolverMode m, NonReferentialResolver nrr)

Method Summary

boolean	canResolve(MentionContext mention) Returns true if this resolver is able to resolve the referring expression 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 List<String>	getFeatures(MentionContext mention, DiscourseEntity entity) Returns a list of features for deciding whether the specified mention refers to the specified discourse entity.

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

defaultReferent, resolve, retain, setSimilarityModel, train

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

CommonNounResolver

public CommonNounResolver(String projectName,
                          ResolverMode m)
                   throws IOException

Throws:

IOException

CommonNounResolver

public CommonNounResolver(String projectName,
                          ResolverMode m,
                          NonReferentialResolver nrr)
                   throws IOException

Throws:

IOException

Method Detail

getFeatures

protected List<String> getFeatures(MentionContext mention,
                                   DiscourseEntity entity)

Description copied from class: MaxentResolver

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

Overrides:

getFeatures in class MaxentResolver

Parameters:

mention - the mention being considers as possibly referential.

entity - The discourse 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 referring expression 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 referring 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 entities whose last extent contains the extent under consideration. This prevents possessive pronouns from referring to the noun phrases they modify and other undesirable 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.