edu.stanford.nlp.trees.international.tuebadz

Class TueBaDZPennTreeNormalizer

java.lang.Object

edu.stanford.nlp.trees.TreeNormalizer

edu.stanford.nlp.trees.international.tuebadz.TueBaDZPennTreeNormalizer

All Implemented Interfaces:

Serializable

public class TueBaDZPennTreeNormalizer
extends TreeNormalizer

Tree normalizer for the TueBaDZ treebank. (An adaptation of Roger Levy's NegraPennTreeNormalizer.)

Author:

Wolfgang Maier (wmaier@sfs.uni-tuebingen.de)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected TreebankLanguagePack	tlp

Constructor Summary

Constructors

Constructor and Description
TueBaDZPennTreeNormalizer(TreebankLanguagePack tlp, int nodeCleanup)
TueBaDZPennTreeNormalizer(TreebankLanguagePack tlp, int nodeCleanup, List<TreeNormalizer> tns)

Method Summary

Modifier and Type	Method and Description
protected String	cleanUpLabel(String label) Remove things like hyphened functional tags and equals from the end of a node label.
String	normalizeNonterminal(String category) Normalizes a nonterminal contents.
String	normalizeTerminal(String leaf) Normalizes a leaf contents.
Tree	normalizeWholeTree(Tree tree, TreeFactory tf) Normalize a whole tree.
String	rootSymbol()

Methods inherited from class java.lang.Object

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

Field Detail

tlp

protected final TreebankLanguagePack tlp

Constructor Detail

TueBaDZPennTreeNormalizer

public TueBaDZPennTreeNormalizer(TreebankLanguagePack tlp,
                                 int nodeCleanup)

TueBaDZPennTreeNormalizer

public TueBaDZPennTreeNormalizer(TreebankLanguagePack tlp,
                                 int nodeCleanup,
                                 List<TreeNormalizer> tns)

Method Detail

rootSymbol

public String rootSymbol()

normalizeTerminal

public String normalizeTerminal(String leaf)

Normalizes a leaf contents. This implementation interns the leaf.

Overrides:

normalizeTerminal in class TreeNormalizer

Parameters:

leaf - The String that decorates the leaf

Returns:

The normalized form of this leaf String

normalizeNonterminal

public String normalizeNonterminal(String category)

Normalizes a nonterminal contents. This implementation strips functional tags, etc. and interns the nonterminal.

Overrides:

normalizeNonterminal in class TreeNormalizer

Parameters:

category - The String that decorates this nonterminal node

Returns:

The normalized form of this nonterminal String

cleanUpLabel

protected String cleanUpLabel(String label)

Remove things like hyphened functional tags and equals from the end of a node label.

normalizeWholeTree

public Tree normalizeWholeTree(Tree tree,
                               TreeFactory tf)

Normalize a whole tree. TueBa-D/Z adaptation. Fixes trees with non-unary roots, does nothing else.

Overrides:

normalizeWholeTree in class TreeNormalizer

Parameters:

tree - The tree to be normalized

tf - the TreeFactory to create new nodes (if needed)

Returns:

Tree the normalized tree