edu.stanford.nlp.trees
Class PennTreebankLanguagePack

java.lang.Object
  edu.stanford.nlp.trees.AbstractTreebankLanguagePack
      edu.stanford.nlp.trees.PennTreebankLanguagePack

All Implemented Interfaces:

TreebankLanguagePack, Serializable

public class PennTreebankLanguagePack
extends AbstractTreebankLanguagePack
implements Serializable

Specifies the treebank/language specific components needed for parsing the English Penn Treebank.

Author:

Christopher Manning

See Also:

Serialized Form

Field Summary

Fields inherited from class edu.stanford.nlp.trees.AbstractTreebankLanguagePack

DEFAULT_ENCODING

Constructor Summary

PennTreebankLanguagePack()
Gives a handle to the TreebankLanguagePack

Method Summary

String[]	evalBIgnoredPunctuationTags() Returns a String array of punctuation tags that EVALB-style evaluation should ignore for this treebank/language.
TokenizerFactory	getTokenizerFactory() Returns a factory for PTBTokenizer.
GrammaticalStructureFactory	grammaticalStructureFactory() Return a GrammaticalStructure suitable for this language/treebank.
char[]	labelAnnotationIntroducingCharacters() Return an array of characters at which a String should be truncated to give the basic syntactic category of a label.
static void	main(String[] args) Prints a few aspects of the TreebankLanguagePack, just for debugging.
String[]	punctuationTags() Returns a String array of punctuation tags for this treebank/language.
String[]	punctuationWords() Returns a String array of punctuation words for this treebank/language.
String[]	sentenceFinalPunctuationTags() Returns a String array of sentence final punctuation tags for this treebank/language.
String[]	sentenceFinalPunctuationWords() Returns a String array of sentence final punctuation words for this treebank/language.
String[]	startSymbols() Returns a String array of treebank start symbols.
String	treebankFileExtension() Returns the extension of treebank files for this treebank.

Methods inherited from class edu.stanford.nlp.trees.AbstractTreebankLanguagePack

basicCategory, categoryAndFunction, evalBIgnoredPunctuationTagAcceptFilter, evalBIgnoredPunctuationTagRejectFilter, getBasicCategoryFunction, getCategoryAndFunctionFunction, getEncoding, isEvalBIgnoredPunctuationTag, isLabelAnnotationIntroducingCharacter, isPunctuationTag, isPunctuationWord, isSentenceFinalPunctuationTag, isStartSymbol, punctuationTagAcceptFilter, punctuationTagRejectFilter, punctuationWordAcceptFilter, punctuationWordRejectFilter, sentenceFinalPunctuationTagAcceptFilter, startSymbol, startSymbolAcceptFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

PennTreebankLanguagePack

public PennTreebankLanguagePack()

Gives a handle to the TreebankLanguagePack

Method Detail

punctuationTags

public String[] punctuationTags()

Returns a String array of punctuation tags for this treebank/language.

Specified by:

punctuationTags in interface TreebankLanguagePack

Specified by:

punctuationTags in class AbstractTreebankLanguagePack

Returns:

The punctuation tags

punctuationWords

public String[] punctuationWords()

Returns a String array of punctuation words for this treebank/language.

Specified by:

punctuationWords in interface TreebankLanguagePack

Specified by:

punctuationWords in class AbstractTreebankLanguagePack

Returns:

The punctuation words

sentenceFinalPunctuationTags

public String[] sentenceFinalPunctuationTags()

Returns a String array of sentence final punctuation tags for this treebank/language.

Specified by:

sentenceFinalPunctuationTags in interface TreebankLanguagePack

Specified by:

sentenceFinalPunctuationTags in class AbstractTreebankLanguagePack

Returns:

The sentence final punctuation tags

sentenceFinalPunctuationWords

public String[] sentenceFinalPunctuationWords()

Returns a String array of sentence final punctuation words for this treebank/language.

Specified by:

sentenceFinalPunctuationWords in interface TreebankLanguagePack

Returns:

The sentence final punctuation tags

evalBIgnoredPunctuationTags

public String[] evalBIgnoredPunctuationTags()

Returns a String array of punctuation tags that EVALB-style evaluation should ignore for this treebank/language. Traditionally, EVALB has ignored a subset of the total set of punctuation tags in the English Penn Treebank (quotes and period, comma, colon, etc., but not brackets)

Specified by:

evalBIgnoredPunctuationTags in interface TreebankLanguagePack

Overrides:

evalBIgnoredPunctuationTags in class AbstractTreebankLanguagePack

Returns:

Whether this is a EVALB-ignored punctuation tag

labelAnnotationIntroducingCharacters

public char[] labelAnnotationIntroducingCharacters()

Return an array of characters at which a String should be truncated to give the basic syntactic category of a label. The idea here is that Penn treebank style labels follow a syntactic category with various functional and crossreferencing information introduced by special characters (such as "NP-SBJ=1"). This would be truncated to "NP" by the array containing '-' and "=".

Specified by:

labelAnnotationIntroducingCharacters in interface TreebankLanguagePack

Overrides:

labelAnnotationIntroducingCharacters in class AbstractTreebankLanguagePack

Returns:

An array of characters that set off label name suffixes

startSymbols

public String[] startSymbols()

Returns a String array of treebank start symbols.

Specified by:

startSymbols in interface TreebankLanguagePack

Specified by:

startSymbols in class AbstractTreebankLanguagePack

Returns:

The start symbols

getTokenizerFactory

public TokenizerFactory getTokenizerFactory()

Returns a factory for PTBTokenizer.

Specified by:

getTokenizerFactory in interface TreebankLanguagePack

Overrides:

getTokenizerFactory in class AbstractTreebankLanguagePack

Returns:

A tokenizer

treebankFileExtension

public String treebankFileExtension()

Returns the extension of treebank files for this treebank. This is "mrg".

Specified by:

treebankFileExtension in interface TreebankLanguagePack

grammaticalStructureFactory

public GrammaticalStructureFactory grammaticalStructureFactory()

Return a GrammaticalStructure suitable for this language/treebank.

Specified by:

grammaticalStructureFactory in interface TreebankLanguagePack

Overrides:

grammaticalStructureFactory in class AbstractTreebankLanguagePack

Returns:

A GrammaticalStructure suitable for this language/treebank.

main

public static void main(String[] args)

Prints a few aspects of the TreebankLanguagePack, just for debugging.