protected function __construct($post)
{
parent::__construct($post);
// Set standard content
$this->description =& $this->content;
$this->caption =& $this->excerpt;
// Retrieve post meta
$this->alt = get_post_meta($this->id, '_wp_attachment_image_alt', true);
$this->mime_type = get_post_mime_type($this->id);
$this->link = wp_get_attachment_url($this->id);
}