edu.umn.cs.nlp.mt.chiang2007
Class BilingualTranslationRule

java.lang.Object
  edu.umn.cs.nlp.mt.TranslationRule
      edu.umn.cs.nlp.mt.chiang2007.BilingualTranslationRule

All Implemented Interfaces:

Scorable, Comparable<TranslationRule>

public class BilingualTranslationRule
extends TranslationRule

The left-hand side of a Chiang-style translation rule, including associated rule features.

Version:

$LastChangedDate: 2007-07-24 16:48:53 -0500 (Tue, 24 Jul 2007) $

Author:

Lane Schwartz

See Also:

"A Hierarchical Phrase-Based Model for Statistical Machine Translation" by David Chiang (ACL, 2005)

Field Summary

Fields inherited from class edu.umn.cs.nlp.mt.TranslationRule

S_GLUE_RULE, S_RULE, UNKNOWN_WORD_RULE

Constructor Summary

BilingualTranslationRule(String targetLanguageRHS)
Construct a bilingual translation rule with default values for the log-linear features.

BilingualTranslationRule(String targetLanguageRHS, double lexLogProbSourceGivenTarget, double lexLogProbTargetGivenSource, double ruleLogProbSourceGivenTarget, double ruleLogProbTargetGivenSource)
Construct a bilingual translation rule with the specified log-linear feature values.

Method Summary

LoglinearTranslationFeatures	getFeatures()
double	getLexLogProbSourceGivenTarget()
double	getLexLogProbTargetGivenSource()
int	getNumberOfTargetWords()
double	getRuleLogProbSourceGivenTarget()
double	getRuleLogProbTargetGivenSource()
double	getScore() Get score
String	getSymbol()
String	getTargetLanguageRHS() Get the target language right-hand side of the rule
String	toString()

Methods inherited from class edu.umn.cs.nlp.mt.TranslationRule

compareTo

Methods inherited from class java.lang.Object

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

Constructor Detail

BilingualTranslationRule

public BilingualTranslationRule(String targetLanguageRHS,
                                double lexLogProbSourceGivenTarget,
                                double lexLogProbTargetGivenSource,
                                double ruleLogProbSourceGivenTarget,
                                double ruleLogProbTargetGivenSource)

Construct a bilingual translation rule with the specified log-linear feature values.

Parameters:

targetLanguageRHS - Target language right-hand side of the rule

lexLogProbSourceGivenTarget - Log-linear feature representing the log probabilibity of the source language words given the target language words

lexLogProbTargetGivenSource - Log-linear feature representing the log probabilibity of the target language words given the source language words

ruleLogProbSourceGivenTarget - Log-linear feature representing the log probabilibity of the source language phrase given the target language phrase

ruleLogProbTargetGivenSource - Log-linear feature representing the log probabilibity of the target language phrase given the source language phrase

BilingualTranslationRule

public BilingualTranslationRule(String targetLanguageRHS)

Construct a bilingual translation rule with default values for the log-linear features.

Parameters:

targetLanguageRHS - Target language right-hand side of the rule

Method Detail

getTargetLanguageRHS

public String getTargetLanguageRHS()

Get the target language right-hand side of the rule

Specified by:

getTargetLanguageRHS in class TranslationRule

Returns:

Target language right-hand side of the rule

getLexLogProbSourceGivenTarget

public double getLexLogProbSourceGivenTarget()

Returns:

the lexLogProbSourceGivenTarget

getLexLogProbTargetGivenSource

public double getLexLogProbTargetGivenSource()

Returns:

the lexLogProbTargetGivenSource

getRuleLogProbSourceGivenTarget

public double getRuleLogProbSourceGivenTarget()

Returns:

the ruleLogProbSourceGivenTarget

getRuleLogProbTargetGivenSource

public double getRuleLogProbTargetGivenSource()

Returns:

the ruleLogProbTargetGivenSource

getSymbol

public String getSymbol()

Specified by:

getSymbol in class TranslationRule

getFeatures

public LoglinearTranslationFeatures getFeatures()

Specified by:

getFeatures in class TranslationRule

getScore

public double getScore()

Description copied from interface: Scorable

Get score

Specified by:

getScore in interface Scorable

Specified by:

getScore in class TranslationRule

Returns:

score

toString

public String toString()

Overrides:

toString in class Object

getNumberOfTargetWords

public int getNumberOfTargetWords()

Specified by:

getNumberOfTargetWords in class TranslationRule