1.
      $acl = new Zend_Acl();
   2.

   3.
      // setup the various roles in our system
   4.
      $acl->addRole('guest');
   5.
      // owner inherits all of the rules of guest
   6.
      $acl->addRole('owner', 'guest');
   7.

   8.
      // add the resources
   9.
      $acl->addResource('blogPost');
  10.

  11.
      // add privileges to roles and resource combinations
  12.
      $acl->allow('guest', 'blogPost', 'view');
  13.
      $acl->allow('owner', 'blogPost', 'post');
  14.
      $acl->allow('owner', 'blogPost', 'publish');