package ixa.kaflib;
   
   import java.io.Serializable;
   import java.util.ArrayList;
   import java.util.List;
   
   
   public class NonTerminal extends TreeNode implements Serializable {
   
      /** Label */
      private String label;
  
      /** Nodes' children */
      private List<TreeNode> children;
  
  
      NonTerminal(String id, String label) {
  	super(id, false, false);
  	this.label = label;
  	this.children = new ArrayList<TreeNode>();
      }
  
      public String getLabel() {
  	return this.label;
      }
  
      public void setLabel(String label) {
  	this.label = label;
      }
  
      public void addChild(TreeNode tn) throws Exception {
  	this.children.add(tn);
      }
  
      public List<TreeNode> getChildren() {
  	return this.children;
      }
  
  }