| 摘要 |
PROBLEM TO BE SOLVED: To simplify the constitution of a control system for imparting a uniform interface to a POS application making Java (registered trademark) as a base. SOLUTION: A new fifth interface 35i defining a function Set Entry delivering an entry point of a data base 33 to a device service(DS) 13 is prepared and the DS 13 incorporated into the control system 39 is made to a rule mounting this interface. Thereby, a freedom is obtained at a preparation method of the DS and the better DS can be prepared. A load can be carried out even to the DS of another maker and the DS of the other devices by a common factory class and the POS system making Java (registered trademark) as a base can be provided by a simpler constitution at a low cost.
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