DATA TRANSFER SYSTEM BETWEEN DATA BASES OF DIFFERENT TYPES

PURPOSE:To facilitate a data correcting job by providing a temporary data base while data are transferred to a production data base from a design data base. CONSTITUTION:A data transmission part 4 extracts the initial design data on a design data base 1 and updating design data on histories 1-n and n+1 and gives offset to the initial design data for additional indications, deleting indications, etc. via the updating design data for production of the design data SIGMAMi+B via a communication circuit 11. A data reception part 7 compares the data SIGMAMi+A already stored in a production data base 2 and stores the difference between both data in the base 2 as the updating production data of the history n+1.