text: // Copyright 2012 Google Inc. All Rights Reserved.
  
  /**
   * @fileoverview Defines a result type interface.
   * @author peterxiao@google.com (Peter Xiao)
   */
  
  goog.provide('cvox.AbstractResult');
  
  goog.require('cvox.SearchUtil');
  
  /**
   * @constructor
   */
  cvox.AbstractResult = function() { };
  
  /**
   * Checks the result if it is an unknown result.
   * @param {Element} result Result to be checked.
   * @return {boolean} Whether or not the element is an unknown result.
   */
  cvox.AbstractResult.prototype.isType = function(result) {
    return false;
  };
  
  /**
   * Speak a generic search result.
   * @param {Element} result Generic result to be spoken.
   * @return {boolean} Whether or not the result was spoken.
   */
  cvox.AbstractResult.prototype.speak = function(result) {
    return false;
  };
  
  /**
   * Extracts the wikipedia URL from knowledge panel.
   * @param {Element} result Result to extract from.
   * @return {?string} URL.
   */
  cvox.AbstractResult.prototype.getURL = cvox.SearchUtil.extractURL;
  
  /**
   * Returns the node to sync to.
   * @param {Element} result Result.
   * @return {?Node} Node to sync to.
   */
  cvox.AbstractResult.prototype.getSyncNode = function(result) {
    return result;
  };
  