opennlp.tools.coref.resolver
Class ProperNounResolver

java.lang.Object
  extended by opennlp.tools.coref.resolver.AbstractResolver
      extended by opennlp.tools.coref.resolver.MaxentResolver
          extended by opennlp.tools.coref.resolver.ProperNounResolver
All Implemented Interfaces:
Resolver

public class ProperNounResolver
extends MaxentResolver

Resolves coreference between proper 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
ProperNounResolver(String projectName, ResolverMode m)
           
ProperNounResolver(String projectName, ResolverMode m, NonReferentialResolver nonRefResolver)
           
 
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.
 boolean excluded(MentionContext mention, DiscourseEntity entity)
          Excludes entities which you are not compatible with the entity under consideration.
protected  List<String> getAcronymFeatures(MentionContext mention, DiscourseEntity entity)
           
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

ProperNounResolver

public ProperNounResolver(String projectName,
                          ResolverMode m)
                   throws IOException
Throws:
IOException

ProperNounResolver

public ProperNounResolver(String projectName,
                          ResolverMode m,
                          NonReferentialResolver nonRefResolver)
                   throws IOException
Throws:
IOException
Method Detail

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.

getAcronymFeatures

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

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.

excluded

public boolean excluded(MentionContext mention,
                        DiscourseEntity entity)
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:
mention - The mention which is being considered as referential.
entity - The entity to which the mention is to be resolved.
Returns:
true if the entity should be excluded, false otherwise.


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