Abstract: A data processing device (1) is installed in a data processing server (2) adapted to receive primary data and to transmit said primary data after application by control means (5) of dedicated processing based on primary rules. The device comprises, firstly, a first table (T1) in which are stored sets of at least one primary rule, called “primary metarules”, in a parameterizable form, in corresponding relationship to primary identifiers, and, secondly, management means (8) intended to be coupled to the control means (5) and adapted, on receipt of auxiliary data representing operating parameters delivered by the control means (5) after the reception by the server (2) of secondary data, to select at least one of the primary identifiers in the first table (T1) and associate the auxiliary data therewith in such a manner as to define the dedicated processes.