A method using SyncML, or other similar markup language, by which two
devices (11 12) synchronize how data is organized in respective data
stores (11c 12c) maintained by the devices (11 12), and devices (11 12)
operating according to the method as well as a corresponding computer
program by which either of the devices (11 12) is operable according to
the method. According to the method, the two devices (11 12) synchronize
their respective data stores (11c 12c) with respect to folders for
containing data units and possibly other folders by steps (31e 31j) of
exchanging messages (21) that include data identification elements (28 29)
that refer to the folders in order to be able to synchronize the data
stores (11c 1 '2c) with respect to the folders, with the data
identification elements (28 29) provided in the message external to any
reference to data units.