case Rewrite::IDENTICAL_NODES: return "IDENTICAL_NODES";
case Rewrite::INTERSECTION_EMPTY_LEFT: return "INTERSECTION_EMPTY_LEFT";
case Rewrite::INTERSECTION_EMPTY_RIGHT: return "INTERSECTION_EMPTY_RIGHT";
case Rewrite::IDENTICAL_NODES: return "IDENTICAL_NODES";
case Rewrite::INTERSECTION_EMPTY_LEFT: return "INTERSECTION_EMPTY_LEFT";
case Rewrite::INTERSECTION_EMPTY_RIGHT: return "INTERSECTION_EMPTY_RIGHT";