public function getID() {
		$parents = $this->getParents();
		$c = count($parents);

		if($c > 0) {
			$id = $parents[0].'-';
			for($i=1; $i<$c; $i++)
				$id .= $parents[$i].'-';
			$id .= $this->name;
			return $id;
		}
		else
			return $this->name;
	}