edu.cmu.minorthird.text.learn
Class Extraction2TaggingReduction

java.lang.Object
  edu.cmu.minorthird.text.learn.Extraction2TaggingReduction

Direct Known Subclasses:

BeginContinueEndUniqueReduction, BeginContinueOutsideReduction, InsideOutsideReduction

public abstract class Extraction2TaggingReduction
extends java.lang.Object

A scheme for reducing an extraction task to a tagging task.

Author:

William Cohen

Constructor Summary

Extraction2TaggingReduction()

Method Summary

protected void	assignDefaultLabels(Span doc, MonotonicTextLabels taggedLabels, java.lang.String spanType, java.lang.String spanProp) Label all tokens as negative, including ones which are inside a span to be extracted.
abstract void	extractFromTags(java.lang.String output, MonotonicTextLabels labels) Alter a TextLabels object with tagged tokens by using them to solve the extraction problem.
abstract java.util.Set<java.lang.String>	getNonDefaultTagValues() Get all the tag values that were used.
abstract TextLabels	getTaggedLabels() Return the TextLabels holding the tags which encode the extraction task.
abstract java.lang.String	getTokenProp() Return the token property used for the tags which encode the extraction task.
abstract void	reduceExtraction2Tagging(AnnotationExample example) Convert the information in a single annotation example to token 'tags' (token properties, assigned to every token).

Methods inherited from class java.lang.Object

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

Constructor Detail

Extraction2TaggingReduction

public Extraction2TaggingReduction()

Method Detail

reduceExtraction2Tagging

public abstract void reduceExtraction2Tagging(AnnotationExample example)

Convert the information in a single annotation example to token 'tags' (token properties, assigned to every token).

getTokenProp

public abstract java.lang.String getTokenProp()

Return the token property used for the tags which encode the extraction task.

getNonDefaultTagValues

public abstract java.util.Set<java.lang.String> getNonDefaultTagValues()

Get all the tag values that were used.

getTaggedLabels

public abstract TextLabels getTaggedLabels()

Return the TextLabels holding the tags which encode the extraction task.

extractFromTags

public abstract void extractFromTags(java.lang.String output,
                                     MonotonicTextLabels labels)

Alter a TextLabels object with tagged tokens by using them to solve the extraction problem.

assignDefaultLabels

protected void assignDefaultLabels(Span doc,
                                   MonotonicTextLabels taggedLabels,
                                   java.lang.String spanType,
                                   java.lang.String spanProp)

Label all tokens as negative, including ones which are inside a span to be extracted. This is intended to be used before labeling the positive tokens appropriately.