edu.stanford.nlp.trees.international.pennchinese.SunJurafskyChineseHeadFinder Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of stanford-corenlp Show documentation

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.

There is a newer version: 4.5.7

Show newest version

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

import edu.stanford.nlp.trees.AbstractCollinsHeadFinder;
import edu.stanford.nlp.trees.TreebankLanguagePack;
import edu.stanford.nlp.util.Generics;

/**
 * A HeadFinder for Chinese based on rules described in Sun/Jurafsky NAACL 2004.
 *
 * @author Galen Andrew
 * @version Jul 12, 2004
 */
public class SunJurafskyChineseHeadFinder extends AbstractCollinsHeadFinder {

  private static final long serialVersionUID = -7942375587642755210L;

  public SunJurafskyChineseHeadFinder() {
    this(new ChineseTreebankLanguagePack());
  }

  public SunJurafskyChineseHeadFinder(TreebankLanguagePack tlp) {
    super(tlp);

    defaultRule = new String[]{"right"};

    nonTerminalInfo = Generics.newHashMap();

    nonTerminalInfo.put("ROOT", new String[][]{{"left", "IP"}});
    nonTerminalInfo.put("PAIR", new String[][]{{"left", "IP"}});

    nonTerminalInfo.put("ADJP", new String[][]{{"right", "ADJP", "JJ", "AD"}});
    nonTerminalInfo.put("ADVP", new String[][]{{"right", "ADVP", "AD", "CS", "JJ", "NP", "PP", "P", "VA", "VV"}});
    nonTerminalInfo.put("CLP", new String[][]{{"right", "CLP", "M", "NN", "NP"}});
    nonTerminalInfo.put("CP", new String[][]{{"right", "CP", "IP", "VP"}});
    nonTerminalInfo.put("DNP", new String[][]{{"right", "DEG", "DNP", "DEC", "QP"}});
    nonTerminalInfo.put("DP", new String[][]{{"left", "M", "DP", "DT", "OD"}});
    nonTerminalInfo.put("DVP", new String[][]{{"right", "DEV", "AD", "VP"}});
    nonTerminalInfo.put("IP", new String[][]{{"right", "VP", "IP", "NP"}});
    nonTerminalInfo.put("LCP", new String[][]{{"right", "LCP", "LC"}});
    nonTerminalInfo.put("LST", new String[][]{{"right", "CD", "NP", "QP"}});
    nonTerminalInfo.put("NP", new String[][]{{"right", "NP", "NN", "IP", "NR", "NT"}});
    nonTerminalInfo.put("PP", new String[][]{{"left", "P", "PP"}});
    nonTerminalInfo.put("PRN", new String[][]{{"left", "PU"}});
    nonTerminalInfo.put("QP", new String[][]{{"right", "QP", "CLP", "CD"}});
    nonTerminalInfo.put("UCP", new String[][]{{"left", "IP", "NP", "VP"}});
    nonTerminalInfo.put("VCD", new String[][]{{"left", "VV", "VA", "VE"}});
    nonTerminalInfo.put("VP", new String[][]{{"left", "VE", "VC", "VV", "VNV", "VPT", "VRD", "VSB", "VCD", "VP"}});
    nonTerminalInfo.put("VPT", new String[][]{{"left", "VA", "VV"}});
    nonTerminalInfo.put("VCP", new String[][]{{"left"}});
    nonTerminalInfo.put("VNV", new String[][]{{"left"}});
    nonTerminalInfo.put("VRD", new String[][]{{"left", "VV", "VA"}});
    nonTerminalInfo.put("VSB", new String[][]{{"right", "VV", "VE"}});
    nonTerminalInfo.put("FRAG", new String[][]{{"right", "VV", "NN"}}); //FRAG seems only to be used for bits at the beginnings of articles: "Xinwenshe" and "(wan)"

    // some POS tags apparently sit where phrases are supposed to be
    nonTerminalInfo.put("CD", new String[][]{{"right", "CD"}});
    nonTerminalInfo.put("NN", new String[][]{{"right", "NN"}});
    nonTerminalInfo.put("NR", new String[][]{{"right", "NR"}});

    // I'm adding these POS tags to do primitive morphology for character-level
    // parsing.  It shouldn't affect anything else because heads of preterminals are not
    // generally queried - GMA
    nonTerminalInfo.put("VV", new String[][]{{"left"}});
    nonTerminalInfo.put("VA", new String[][]{{"left"}});
    nonTerminalInfo.put("VC", new String[][]{{"left"}});
    nonTerminalInfo.put("VE", new String[][]{{"left"}});
  }

  /* Yue Zhang and Stephen Clark 2008 based their rules on Sun/Jurafsky but changed a few things.
  Constituent Rules
  ADJP r ADJP JJ AD; r
  ADVP r ADVP AD CS JJ NP PP P VA VV; r
  CLP r CLP M NN NP; r
  CP r CP IP VP; r
  DNP r DEG DNP DEC QP; r
  DP r M; l DP DT OD; l
  DVP r DEV AD VP; r
  FRAG r VV NR NN NT; r
  IP r VP IP NP; r
  LCP r LCP LC; r
  LST r CD NP QP; r
  NP r NP NN IP NR NT; r
  NN r NP NN IP NR NT; r
  PP l P PP; l
  PRN l PU; l
  QP r QP CLP CD; r
  UCP l IP NP VP; l
  VCD l VV VA VE; l
  VP l VE VC VV VNV VPT VRD VSB
  VCD VP; l
  VPT l VA VV; l
  VRD l VVI VA; l
  VSB r VV VE; r
  default r
  */

}