edu.illinois.cs.cogcomp.nlp.utilities

Class CollinsHeadDependencyParser

java.lang.Object

edu.illinois.cs.cogcomp.nlp.utilities.CollinsHeadDependencyParser

public class CollinsHeadDependencyParser
extends Object

Uses the Collins' head percolation table to get a dependency tree using a parse tree

Author:

Vivek Srikumar

Constructor Summary

Constructors

Constructor and Description
CollinsHeadDependencyParser(boolean convertPrepositionsToEdgeLabels) Create a CollinsHeadDependencyParser
CollinsHeadDependencyParser(boolean convertPrepositionsToEdgeLabels, CollinsHeadFinder headFinder)

Method Summary

Modifier and Type	Method and Description
protected Tree<Pair<String,Integer>>	collapseClitics(Tree<Pair<String,Integer>> tree)
protected Tree<Pair<String,Integer>>	collapsePrepositionLabels(Tree<Pair<String,Integer>> tree)
Tree<String>	getDependencyTree(Constituent parseTreeRoot)
protected Pair<String,Integer>	getEdgeLabel(Constituent parseTreeRoot, String string, Constituent child)
Tree<Pair<String,Integer>>	getLabeledDependencyTree(Constituent parseTreeRoot)
protected Pair<Tree<Pair<String,Integer>>,String>	processPPTree(Tree<Pair<String,Integer>> tree)

Methods inherited from class java.lang.Object

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

Constructor Detail

CollinsHeadDependencyParser

public CollinsHeadDependencyParser(boolean convertPrepositionsToEdgeLabels)

Create a CollinsHeadDependencyParser

Parameters:

convertPrepositionsToEdgeLabels - Should prepositions be merged into the edge labels?

CollinsHeadDependencyParser

public CollinsHeadDependencyParser(boolean convertPrepositionsToEdgeLabels,
                                   CollinsHeadFinder headFinder)

Method Detail

getDependencyTree

public Tree<String> getDependencyTree(Constituent parseTreeRoot)

getLabeledDependencyTree

public Tree<Pair<String,Integer>> getLabeledDependencyTree(Constituent parseTreeRoot)

collapseClitics

protected Tree<Pair<String,Integer>> collapseClitics(Tree<Pair<String,Integer>> tree)

collapsePrepositionLabels

protected Tree<Pair<String,Integer>> collapsePrepositionLabels(Tree<Pair<String,Integer>> tree)

processPPTree

protected Pair<Tree<Pair<String,Integer>>,String> processPPTree(Tree<Pair<String,Integer>> tree)

getEdgeLabel

protected Pair<String,Integer> getEdgeLabel(Constituent parseTreeRoot,
                                            String string,
                                            Constituent child)