Drupal hook menu example

$items['xml/pledges.xml'] = array(
    'type' => 'MENU_CALLBACK',
    'title' => 'pledges',
    'description' => 'The description of the menu item. It is used as title attribute and on the administration overview page.',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('go_markmap_get_pledges'),
    'access callback' => TRUE,
  );