capacitive resistive signals so that a more complicated communications system between the door and a portable apparatus carried by the user u2014 for example with data encoding algorithms and or protocolling u2014 is possible wo 2007 036061 is referred to by way of example here in embodiments of the first aspect and also of the other aspects of the invention in particular of the second aspect of the invention the door fitting or even the whole door may be metallic the door fitting in particular may be free of non metallic surface sections recesses or likewise and a metallic element u2014 with the exception of possible openings u2014 may be introduced into the door handle shank closure cylinder in each case essentially metallic and or likewise and cover the complete fitting surface this does not exclude the metallic element being coated by a non metallic layer u2014 for example oxide layer this is in contrast to the door fittings for doors with rfid identification locking devices with regard to the latter the fitting at least at the locations of the rfid antenna of the respective reader may be non metallic wherein this fitting often comprises a flat base plate which only has.