aima.core.nlp.parsing.grammars

Class Rule

java.lang.Object

aima.core.nlp.parsing.grammars.Rule

public class Rule
extends java.lang.Object

A derivation rule that is contained within a grammar. This rule is probabilistic, in that it has an associated probability representing the likelihood that the RHS follows from the LHS, given the presence of the LHS.

Author:

Jonathon (thundergolfer)

Field Summary

Fields

Modifier and Type	Field and Description
java.util.List<java.lang.String>	lhs
float	PROB
java.util.List<java.lang.String>	rhs

Constructor Summary

Constructors

Constructor and Description
Rule(java.util.List<java.lang.String> lhs, float probability)
Rule(java.util.List<java.lang.String> lhs, java.util.List<java.lang.String> rhs, float probability)
Rule(java.lang.String lhs, java.lang.String rhs, float probability)

Method Summary

Modifier and Type	Method and Description
boolean	derives(java.util.List<java.lang.String> sentForm)
boolean	derives(java.lang.String terminal)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

PROB

public final float PROB

lhs

public final java.util.List<java.lang.String> lhs

rhs

public final java.util.List<java.lang.String> rhs

Constructor Detail

Rule

public Rule(java.util.List<java.lang.String> lhs,
            java.util.List<java.lang.String> rhs,
            float probability)

Rule

public Rule(java.util.List<java.lang.String> lhs,
            float probability)

Rule

public Rule(java.lang.String lhs,
            java.lang.String rhs,
            float probability)

Method Detail

derives

public boolean derives(java.util.List<java.lang.String> sentForm)

derives

public boolean derives(java.lang.String terminal)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object