opennlp.grok.preprocess.postag
Class POSTaggerME

java.lang.Object
  |
  +--opennlp.grok.preprocess.postag.POSTaggerME

All Implemented Interfaces:

opennlp.maxent.Evalable, opennlp.common.preprocess.Pipelink, opennlp.common.preprocess.POSTagger

Direct Known Subclasses:

EnglishPOSTaggerME

public class POSTaggerME

extends java.lang.Object

implements opennlp.maxent.Evalable, opennlp.common.preprocess.POSTagger

A part-of-speech tagger that uses maximum entropy. Trys to predict whether words are nouns, verbs, or any of 70 other POS tags depending on their surrounding context.

Version:

$Revision: 1.7 $, $Date: 2002/11/07 23:37:46 $

Author:

Gann Bierner

Field Summary

protected opennlp.common.util.FilterFcn	_closedClassTagsFilter Decides whether a word can be assigned a particular closed class tag.
protected opennlp.maxent.ContextGenerator	_contextGen The feature context generator.
protected opennlp.maxent.MaxentModel	_posModel The maximum entropy model to use to evaluate contexts.
protected boolean	_useClosedClassTagsFilter Says whether a filter should be used to check whether a tag assignment is to a word outside of a closed class.

Constructor Summary

protected	POSTaggerME()
	POSTaggerME(opennlp.maxent.MaxentModel mod)
	POSTaggerME(opennlp.maxent.MaxentModel mod, opennlp.maxent.ContextGenerator cg)

Method Summary

java.util.List	bestSequence(java.util.List words)
opennlp.maxent.EventCollector	getEventCollector(java.io.Reader r)
java.lang.String	getNegativeOutcome()
void	localEval(opennlp.maxent.MaxentModel posModel, java.io.Reader r, opennlp.maxent.Evalable e, boolean verbose)
static void	main(java.lang.String[] args)
void	process(opennlp.common.xml.NLPDocument doc) POS tag the words in a document.
java.util.Set	requires()
java.util.List	tag(java.util.List sentence)
java.lang.String	tag(java.lang.String sentence)
java.lang.String[]	tag(java.lang.String[] sentence)

Methods inherited from class java.lang.Object

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

Field Detail

_posModel

protected opennlp.maxent.MaxentModel _posModel

The maximum entropy model to use to evaluate contexts.

_contextGen

protected opennlp.maxent.ContextGenerator _contextGen

The feature context generator.

_closedClassTagsFilter

protected opennlp.common.util.FilterFcn _closedClassTagsFilter

Decides whether a word can be assigned a particular closed class tag.

_useClosedClassTagsFilter

protected boolean _useClosedClassTagsFilter

Says whether a filter should be used to check whether a tag assignment is to a word outside of a closed class.

Constructor Detail

POSTaggerME

protected POSTaggerME()

POSTaggerME

public POSTaggerME(opennlp.maxent.MaxentModel mod)

POSTaggerME

public POSTaggerME(opennlp.maxent.MaxentModel mod,
                   opennlp.maxent.ContextGenerator cg)

Method Detail

getNegativeOutcome

public java.lang.String getNegativeOutcome()

Specified by:

getNegativeOutcome in interface opennlp.maxent.Evalable

getEventCollector

public opennlp.maxent.EventCollector getEventCollector(java.io.Reader r)

Specified by:

getEventCollector in interface opennlp.maxent.Evalable

process

public void process(opennlp.common.xml.NLPDocument doc)

POS tag the words in a document.

Specified by:

process in interface opennlp.common.preprocess.Pipelink

tag

public java.util.List tag(java.util.List sentence)

Specified by:

tag in interface opennlp.common.preprocess.POSTagger

tag

public java.lang.String[] tag(java.lang.String[] sentence)

Specified by:

tag in interface opennlp.common.preprocess.POSTagger

tag

public java.lang.String tag(java.lang.String sentence)

Specified by:

tag in interface opennlp.common.preprocess.POSTagger

localEval

public void localEval(opennlp.maxent.MaxentModel posModel,
                      java.io.Reader r,
                      opennlp.maxent.Evalable e,
                      boolean verbose)

Specified by:

localEval in interface opennlp.maxent.Evalable

bestSequence

public java.util.List bestSequence(java.util.List words)

requires

public java.util.Set requires()

Specified by:

requires in interface opennlp.common.preprocess.Pipelink

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

java.io.IOException