TreeCoreAnnotations.java

package edu.stanford.nlp.trees;

import edu.stanford.nlp.ling.CoreAnnotation;
import edu.stanford.nlp.ling.CoreAnnotations;


/**
 * Set of common annotations for {@link edu.stanford.nlp.util.CoreMap}'s that require classes from
 * the trees package.  See {@link CoreAnnotations} for more information.  This
 * class exists so that {@link CoreAnnotations} need not depend on trees classes,
 * making distributions easier.
 * @author Anna Rafferty
 *
 */

public class TreeCoreAnnotations {
  
  private TreeCoreAnnotations() {} // only static members

  /**
   * The standard key for storing a head word in the map as a pointer to
   * another node.
   */
  public static class HeadWordAnnotation implements CoreAnnotation<Tree> {
    public Class<Tree> getType() {  return Tree.class; } }

  /**
   * The standard key for storing a head tag in the map as a pointer to
   * another node.
   */
  public static class HeadTagAnnotation implements CoreAnnotation<Tree> {
    public Class<Tree> getType() {  return Tree.class; } }

}