edu.cmu.minorthird.ui
Class Recommended.SemiCRFAnnotatorLearner

java.lang.Object
  edu.cmu.minorthird.text.learn.AnnotatorLearner
      edu.cmu.minorthird.text.learn.SegmentAnnotatorLearner
          edu.cmu.minorthird.ui.Recommended.SemiCRFAnnotatorLearner

Enclosing class:

Recommended

public static class Recommended.SemiCRFAnnotatorLearner
extends SegmentAnnotatorLearner

Learns a semi-Markovian extension of CRFs. Like the voted-perceptron SMM classes, this allows features to describe properties of multi-token spans, rather than only properties of single tokens.

Reference: Sunita Sarawagi and William W. Cohen, Semi-Markov Conditional Random Fields for Information Extraction, in Neural Information Proceedings Systems (NIPS) 2004.

Nested Class Summary

Nested classes/interfaces inherited from class edu.cmu.minorthird.text.learn.SegmentAnnotatorLearner

SegmentAnnotatorLearner.SegmentAnnotator

Field Summary

Fields inherited from class edu.cmu.minorthird.text.learn.SegmentAnnotatorLearner

annotationType, dataset, fe, learner, maxWindowSize

Constructor Summary

Recommended.SemiCRFAnnotatorLearner()
Extracted entities must be of length 4 or less.

Recommended.SemiCRFAnnotatorLearner(int maxIters, int maxLen)

Method Summary

Methods inherited from class edu.cmu.minorthird.text.learn.SegmentAnnotatorLearner

getAnnotationType, getAnnotator, getCompressDataset, getCompressDatasetHelp, getDisplayDatasetBeforeLearning, getDisplayDatasetBeforeLearningHelp, getHistorySize, getSemiMarkovLearner, getSemiMarkovLearnerHelp, getSpanFeatureExtractor, hasNextQuery, nextQuery, reset, setAnnotationType, setAnswer, setCompressDataset, setDisplayDatasetBeforeLearning, setDocumentPool, setSemiMarkovLearner, setSpanFeatureExtractor

Methods inherited from class edu.cmu.minorthird.text.learn.AnnotatorLearner

getAnnotationTypeHelp, getSpanFeatureExtractorHelp

Methods inherited from class java.lang.Object

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

Constructor Detail

Recommended.SemiCRFAnnotatorLearner

public Recommended.SemiCRFAnnotatorLearner()

Extracted entities must be of length 4 or less.

Recommended.SemiCRFAnnotatorLearner

public Recommended.SemiCRFAnnotatorLearner(int maxIters,
                                           int maxLen)