[Haskell-beginners] Named fields in data types

[legajid]

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.