drupal/modules/menu/menu.install

<?php
// $Id$

/**
 * Implementation of hook_install().
 */
function menu_install() {
  // Create tables.
  drupal_install_schema('menu');

  $t = get_t();
  db_query("INSERT INTO {menu_custom} (menu_name, title, description) VALUES ('%s', '%s', '%s')", 'navigation', $t('Navigation'), $t('The navigation menu is provided by Drupal and is the main interactive menu for any site. It is usually the only menu that contains personalized links for authenticated users, and is often not even visible to anonymous users.'));
  db_query("INSERT INTO {menu_custom} (menu_name, title, description) VALUES ('%s', '%s', '%s')", 'main-menu', $t('Main menu'), $t('The Main menu is often used by themes to show the major sections of a site.'));
  db_query("INSERT INTO {menu_custom} (menu_name, title, description) VALUES ('%s', '%s', '%s')", 'secondary-menu', $t('Secondary menu'), $t('The Secondary menu is often used for pages like legal notices, contact details, and other navigation items that play a lesser role than the Main menu.'));
}

/**
 * Implementation of hook_uninstall().
 */
function menu_uninstall() {
  // Remove tables.
  drupal_uninstall_schema('menu');
  menu_rebuild();
}

/**
 * Implementation of hook_schema().
 */
function menu_schema() {
  $schema['menu_custom'] = array(
    'description' => 'Holds definitions for top-level custom menus (for example, Main menu).',
    'fields' => array(
      'menu_name' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Primary Key: Unique key for menu. This is used as a block delta so length is 32.',
      ),
      'title' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Menu title; displayed at top of block.',
      ),
      'description' => array(
        'type' => 'text',
        'not null' => FALSE,
        'description' => 'Menu description.',
      ),
    ),
    'primary key' => array('menu_name'),
  );

  return $schema;
}