edu.northwestern.at.utils.corpuslinguistics.postagger.simple
Class SimpleTagger

java.lang.Object
  edu.northwestern.at.utils.IsCloseableObject
      edu.northwestern.at.utils.corpuslinguistics.postagger.AbstractPartOfSpeechTagger
          edu.northwestern.at.utils.corpuslinguistics.postagger.simple.SimpleTagger

All Implemented Interfaces:

UsesLexicon, CanTagOneWord, PartOfSpeechTagger, IsCloseable, UsesLogger

public class SimpleTagger
extends AbstractPartOfSpeechTagger
implements PartOfSpeechTagger, CanTagOneWord

Simple Part of Speech tagger.

The simple part of speech tagger assigns a "noun" type part of speech to all words, except those that appear to be numbers. Numbers are assigned a "number" part of speech. Words starting with a capital letter can be assigned a separate "proper name" part of speech.

This simple tagger is useful as a backup for a more sophisticated tagger when unknown words are encountered.

Field Summary

protected static java.lang.String	namePOS Proper name part of speech tag.
protected static java.lang.String	nounPOS Noun part of speech tag.
protected static java.lang.String	numberPOS Number part of speech tag.

Fields inherited from class edu.northwestern.at.utils.corpuslinguistics.postagger.AbstractPartOfSpeechTagger

contextRules, contextualSmoother, dynamicLexicon, lexicalRules, lexicalSmoother, lexicon, logger, partOfSpeechGuesser, postTokenizer, retagger, ruleCorrections, transitionMatrix

Constructor Summary

SimpleTagger()
Create a simple tagger.

SimpleTagger(java.lang.String nounPOS, java.lang.String namePOS, java.lang.String numberPOS)
Create a simple tagger.

Method Summary

<T extends AdornedWord> java.util.List<T>	tagAdornedWordList(java.util.List<T> sentence) Tag a sentence.
java.lang.String	tagWord(AdornedWord word) Tag a single adorned word.
java.lang.String	tagWord(java.lang.String word) Tag a single word.
java.lang.String	toString() Return tagger description.

Methods inherited from class edu.northwestern.at.utils.corpuslinguistics.postagger.AbstractPartOfSpeechTagger

clearRuleCorrections, createPartOfSpeechGuesser, getDynamicLexicon, getLexicon, getLexicon, getLogger, getMostCommonTag, getPartOfSpeechGuesser, getRetagger, getRuleCorrections, getTagCount, getTagsForWord, getTransitionMatrix, incrementRuleCorrections, retagWords, setContextRules, setLexicalRules, setLexicon, setLogger, setPartOfSpeechGuesser, setRetagger, setTransitionMatrix, tagAdornedWordSentence, tagAdornedWordSentences, tagSentence, tagSentences, usesContextRules, usesLexicalRules, usesTransitionProbabilities

Methods inherited from class edu.northwestern.at.utils.IsCloseableObject

close

Methods inherited from class java.lang.Object

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

Methods inherited from interface edu.northwestern.at.utils.corpuslinguistics.postagger.PartOfSpeechTagger

clearRuleCorrections, getLexicon, getLexicon, getPartOfSpeechGuesser, getRetagger, getRuleCorrections, getTagCount, getTagsForWord, getTransitionMatrix, incrementRuleCorrections, retagWords, setContextRules, setLexicalRules, setLexicon, setPartOfSpeechGuesser, setRetagger, setTransitionMatrix, tagAdornedWordSentence, tagAdornedWordSentences, tagSentence, tagSentences, usesContextRules, usesLexicalRules, usesTransitionProbabilities

Methods inherited from interface edu.northwestern.at.utils.IsCloseable

close

Field Detail

nounPOS

protected static java.lang.String nounPOS

Noun part of speech tag.

namePOS

protected static java.lang.String namePOS

Proper name part of speech tag.

numberPOS

protected static java.lang.String numberPOS

Number part of speech tag.

Constructor Detail

SimpleTagger

public SimpleTagger()

Create a simple tagger.

SimpleTagger

public SimpleTagger(java.lang.String nounPOS,
                    java.lang.String namePOS,
                    java.lang.String numberPOS)

Create a simple tagger.

Parameters:

nounPOS - Part of speech for a noun.

namePOS - Part of speech for a proper name.

numberPOS - Part of speech tag for a number.

Method Detail

tagAdornedWordList

public <T extends AdornedWord> java.util.List<T> tagAdornedWordList(java.util.List<T> sentence)

Tag a sentence.

Specified by:

tagAdornedWordList in interface PartOfSpeechTagger

Specified by:

tagAdornedWordList in class AbstractPartOfSpeechTagger

Parameters:

sentence - The sentence as an AdornedWord

Returns:

The input List with its words tagged with parts of speech.

tagWord

public java.lang.String tagWord(java.lang.String word)

Tag a single word.

Specified by:

tagWord in interface CanTagOneWord

Parameters:

word - The word.

Returns:

The part of speech for the word.

tagWord

public java.lang.String tagWord(AdornedWord word)

Tag a single adorned word.

Specified by:

tagWord in interface CanTagOneWord

Parameters:

word - The adorned word.

Returns:

The adorned word with the part of speech assigned.

toString

public java.lang.String toString()

Return tagger description.

Overrides:

toString in class java.lang.Object

Returns:

Tagger description.