<?php

  namespace Sabre\CalDAV\Notifications;

  /**
   * This node represents a single notification.
   *

   * The signature is mostly identical to that of Sabre\DAV\IFile, but the get() method

   * MUST return an xml document that matches the requirements of the
   * 'caldav-notifications.txt' spec.
   *
   * For a complete example, check out the Notification class, which contains
   * some helper functions.
   *

   * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
   * @author Evert Pot (http://evertpot.com/)
   * @license http://sabre.io/license/ Modified BSD License

   */

  interface INode {

  
      /**
       * This method must return an xml element, using the

       * Sabre\CalDAV\Notifications\INotificationType classes.

       *

       * @return INotificationType

       */
      function getNotificationType();
  
      /**
       * Returns the etag for the notification.
       *
       * The etag must be surrounded by litteral double-quotes.
       *
       * @return string
       */
      function getETag();
  
  }