<?php
$meta['icon_name']           = array('string');
$meta['icon_thumbnail_name'] = array('string');
$meta['default_image']       = array('string');
$meta['icon_size']           = array('numeric');
$meta['extensions']          = array('string');
$meta['show_on_top']         = array('onoff');
$meta['show_as_favicon']     = array('onoff');
$meta['parent_fallback']     = array('multichoice', '_choices' => array('none', 'direct', 'first'));