| 摘要 |
601622 Disclosed is a point-of-sale system comprising a point-of-sale device (1) and a data processing system. The point-of-sale device has input devices (3) for recording external customer identification codes and for identifying articles and a point of sale data processing device (2) for calculating an amount to be paid as a function of the article identifications. The data processing system (20) is coupled to the point of sale data processing device (2) by means of a data transfer network (12), comprising a first (24) and a second server (21, 22). The first server (24) stores price reduction data sets comprising price reduction data set identifiers, each identifying a price reduction associated with an article identifier, and each of which can be associated with first internal customer identification codes. The first internal customer identification codes are identical to the external customer identification codes or can be uniquely calculated therefrom. The first server device (24) also receives the external customer identification code by means of the data transfer network (12) and derives the associated first internal customer identification code and associated price reduction data sets using the external customer identification code. The server then sends these back to the point of sale data processing device (2). The second server (21, 22) record customer data which comprises article lists and associates the customer data with a second internal customer identification code. The second server (21, 22) then derives article identification data from the article lists and makes said data available for access by a data processing device (11) of a discount provider, without allowing the discount provider access to the customer data and the second internal customer identification code. The second server (21, 22) also receives data from the discount provider specifying price reductions of the at least one article in the article list and transmits the data associated with data identifying the affected articles to the first server (24). The first server (24) stores the data as price reduction data sets, and causes the price reduction data sets stored in the first server to be associated with first internal customer identification codes. The second server (21, 22) derives the first internal customer identification codes from the second internal customer identification codes. Only the second server (21, 22) and the point of sale data processing device (2) can access the first server (24). |
