edu.stanford.nlp.parser.nndep

Class ArcStandard

java.lang.Object

edu.stanford.nlp.parser.nndep.ParsingSystem

edu.stanford.nlp.parser.nndep.ArcStandard

public class ArcStandard
extends ParsingSystem

Defines an arc-standard transition-based dependency parsing system (Nivre, 2004).

Author:

Danqi Chen

Field Summary

Fields inherited from class edu.stanford.nlp.parser.nndep.ParsingSystem

labels, rootLabel, transitions

Constructor Summary

Constructors

Constructor and Description
ArcStandard(TreebankLanguagePack tlp, java.util.List<java.lang.String> labels, boolean verbose)

Method Summary

Modifier and Type	Method and Description
void	apply(Configuration c, java.lang.String t) Apply the given transition to the given configuration, modifying the configuration's state in place.
boolean	canApply(Configuration c, java.lang.String t) Determine whether the given transition is legal for this configuration.
java.lang.String	getOracle(Configuration c, edu.stanford.nlp.parser.nndep.DependencyTree dTree) Provide a static-oracle recommendation for the next parsing step to take.
Configuration	initialConfiguration(CoreMap s) Build an initial parser configuration from the given sentence.
boolean	isOracle(Configuration c, java.lang.String t, edu.stanford.nlp.parser.nndep.DependencyTree dTree) Determine whether applying the given transition in the given configuration tree will leave in us a state in which we can reach the gold tree.
boolean	isTerminal(Configuration c) Determine if the given configuration corresponds to a parser which has completed its parse.

Methods inherited from class edu.stanford.nlp.parser.nndep.ParsingSystem

evaluate, getTransitionID, getUAS, getUASnoPunc, numTransitions

Methods inherited from class java.lang.Object

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

Constructor Detail

ArcStandard

public ArcStandard(TreebankLanguagePack tlp,
                   java.util.List<java.lang.String> labels,
                   boolean verbose)

Method Detail

isTerminal

public boolean isTerminal(Configuration c)

Description copied from class: ParsingSystem

Determine if the given configuration corresponds to a parser which has completed its parse.

initialConfiguration

public Configuration initialConfiguration(CoreMap s)

Description copied from class: ParsingSystem

Build an initial parser configuration from the given sentence.

Specified by:

initialConfiguration in class ParsingSystem

canApply

public boolean canApply(Configuration c,
                        java.lang.String t)

Description copied from class: ParsingSystem

Determine whether the given transition is legal for this configuration.

Specified by:

canApply in class ParsingSystem

Parameters:

c - Parsing configuration

t - Transition string

Returns:

Whether the given transition is legal in this configuration

apply

public void apply(Configuration c,
                  java.lang.String t)

Description copied from class: ParsingSystem

Apply the given transition to the given configuration, modifying the configuration's state in place.

Specified by:

apply in class ParsingSystem

getOracle

public java.lang.String getOracle(Configuration c,
                                  edu.stanford.nlp.parser.nndep.DependencyTree dTree)

Description copied from class: ParsingSystem

Provide a static-oracle recommendation for the next parsing step to take.

Specified by:

getOracle in class ParsingSystem

Parameters:

c - Current parser configuration

dTree - Gold tree which parser needs to reach

Returns:

Transition string

isOracle

public boolean isOracle(Configuration c,
                        java.lang.String t,
                        edu.stanford.nlp.parser.nndep.DependencyTree dTree)

Description copied from class: ParsingSystem

Determine whether applying the given transition in the given configuration tree will leave in us a state in which we can reach the gold tree. (Useful for building a dynamic oracle.)