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Stanford CoreNLP provides a set of natural language analysis tools which can take raw English language text input and give the base forms of words, their parts of speech, whether they are names of companies, people, etc., normalize dates, times, and numeric quantities, mark up the structure of sentences in terms of phrases and word dependencies, and indicate which noun phrases refer to the same entities. It provides the foundational building blocks for higher level text understanding applications.

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package edu.stanford.nlp.trees.international.hebrew;

import edu.stanford.nlp.trees.AbstractTreebankLanguagePack;
import edu.stanford.nlp.trees.HeadFinder;
import edu.stanford.nlp.trees.LeftHeadFinder;
import edu.stanford.nlp.trees.TreeReaderFactory;

/**
 * 
 * @author Spence Green
 *
 */
public class HebrewTreebankLanguagePack extends AbstractTreebankLanguagePack {

  private static final long serialVersionUID = 4787589385598144401L;

  private static final String[] pennPunctTags = {"yyCLN", "yyCM","yyDASH","yyDOT","yyEXCL","yyLRB","yyQM","yyQUOT","yyRRB","yySCLN"};
  
  private static final String[] pennSFPunctTags = {"yyDOT","yyEXCL","yyQM"};

  private static final String[] collinsPunctTags = {"-NONE-","yyCLN", "yyCM","yyDASH","yyDOT","yyEXCL","yyLRB","yyQM","yyQUOT","yyRRB","yySCLN"};;

  private static final char[] annotationIntroducingChars = {'-', '=', '|', '#', '^', '~'};

  /**
   * wsg: This is the convention in Reut's preprocessed version of the treebank, and the Collins stuff.
   * But we could change it to ROOT....
   */
  private static final String[] pennStartSymbols = {"TOP"};
  
  @Override
  public String[] punctuationTags() {
    return pennPunctTags;
  }

  @Override
  public String[] punctuationWords() {
    return pennPunctTags;//Same as PTB
  }

  @Override
  public String[] sentenceFinalPunctuationTags() {
    return pennSFPunctTags;
  }

  @Override
  public String[] startSymbols() {
    return pennStartSymbols;
  }

  //TODO: Need to add Reut's rules
  public HeadFinder headFinder() {
    return new LeftHeadFinder();
  }

  //TODO: Need to add Reut's rules
  public HeadFinder typedDependencyHeadFinder() {
    return new LeftHeadFinder();
  }

  public String[] sentenceFinalPunctuationWords() {
    return pennSFPunctTags;
  }
  
  @Override
  public String[] evalBIgnoredPunctuationTags() {
    return collinsPunctTags;
  }

  public String treebankFileExtension() {
    return "tree";
  }
  
  @Override
  public char[] labelAnnotationIntroducingCharacters() {
    return annotationIntroducingChars;
  }
  
  @Override
  public TreeReaderFactory treeReaderFactory() {
    return new HebrewTreeReaderFactory();
  }
}