Abstract: A computer-implemented method for converting messages between different data formats in a network for electronic data interchange (EDI), comprises: receiving (110) an electronic message from a participant of the network; determining (120) at least one first possible data format of the electronic message, based on the content of the electronic message; validating (130) the electronic message, based on the at least one first possible data format; and converting (140) the message from the first data format into a second predetermined data format, using a message mapping definition associated with the first data format, if the validating step succeeds; and learning a new data format that validates the electronic message and an associated message mapping definition otherwise.