'0 (reserved)' , '1' => '1 (most urgent)' , '2' => '2' , '3' => '3' , '4' => '4' , '5' => '5 (normal urgency)' , '6' => '6' , '7' => '7' , '8' => '8 (least urgent)' , '9' => '9 (user-defined priority)' ); } }