edu.stanford.nlp.ie.hmm
Class HMMSingleFieldExtractor

java.lang.Object
  |
  +--edu.stanford.nlp.ie.AbstractFieldExtractor
        |
        +--edu.stanford.nlp.ie.SingleFieldExtractor
              |
              +--edu.stanford.nlp.ie.hmm.HMMSingleFieldExtractor

All Implemented Interfaces:

FieldExtractor, RankedExtractor, Serializable

public class HMMSingleFieldExtractor

extends SingleFieldExtractor

An interface between the KAON extraction world, and extraction of a single field via an HMM information extractor.

See Also:

Serialized Form

Constructor Summary

HMMSingleFieldExtractor(String relation)

Method Summary

String	extractField(edu.unika.aifb.kaon.Instance i, String text) Subclasses should override this method to perform extraction from the given text.
String	getDescription() Returns a brief (one line) description of this FieldExtractor, suitable for printing.
String	getExtractableField()
String	getExtractableField(edu.unika.aifb.kaon.Concept c) Subclasses should override this method to return the name of the Relation they know how to extract, or null if this field is not supported for the given Concept.
boolean	load(String hmmFile)
static void	main(String[] args) Load a serialized HMM and write to serialized HMMSingleFieldExtractor.
void	setHMM(HMM h)
static void	train(String[] args) Train an HMM and write to serialized HMMSingleFieldExtractor

Methods inherited from class edu.stanford.nlp.ie.SingleFieldExtractor

extractField, extractFields, extractFields, getExtractableFields

Methods inherited from class edu.stanford.nlp.ie.AbstractFieldExtractor

isFieldExtractable, storeExtractor, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

HMMSingleFieldExtractor

public HMMSingleFieldExtractor(String relation)

Method Detail

main

public static void main(String[] args)

Load a serialized HMM and write to serialized HMMSingleFieldExtractor.

Parameters:

args - Command line arguments:
java HMMSingleFieldExtractor fieldName hmmfile objectOutputFile

train

public static void train(String[] args)

Train an HMM and write to serialized HMMSingleFieldExtractor

load

public boolean load(String hmmFile)

setHMM

public void setHMM(HMM h)

getExtractableField

public String getExtractableField(edu.unika.aifb.kaon.Concept c)

Subclasses should override this method to return the name of the Relation they know how to extract, or null if this field is not supported for the given Concept.

Specified by:

getExtractableField in class SingleFieldExtractor

getExtractableField

public String getExtractableField()

extractField

public String extractField(edu.unika.aifb.kaon.Instance i,
                           String text)

Subclasses should override this method to perform extraction from the given text. The Instance is provided only as a potentially additional source of information. Subclasses should just return the extracted text as a String, or null if no field is found in the given text.

Specified by:

extractField in class SingleFieldExtractor

getDescription

public String getDescription()

Returns a brief (one line) description of this FieldExtractor, suitable for printing.