Fragment::addNode

public function addNode($id, $parentId, $data = array())
{
	// todo: strict check of $id and $parentId here?

	if(!is_array($data))
	{
		$data = array();
	}
	$data['__PARENT_ID'] = intval($parentId);
	$data['__ID'] = intval($id);

	$this->values[$id] = $data;
}