[Haskell-beginners] Named fields in data types

Hello, i've some trouble with named fields in data types. data Carnet = Adresse { nom :: String, cp :: Integer, ville :: String } | Telephone {nom::String, telnum::String} deriving Show contact01 = Adresse "Didier" 51100 "Reims" contact02 = Adresse {nom="Laure", cp=0} -- line 1 --contact02 Adresse { ville="Nogent" } -- line 2 --contact02 { ville="Nogent" } -- line 3 contact03=Telephone "Didier" "0326..." -- line 4 When loading this source : line 1 says "warning : Fields not initialized :ville line 2 and 3 when uncommented give parse error (possibly indentation) I'm ok with line 1. Is it possible to write such things as line2 or 3 ? Which syntax ? Thanks for help. Didier.