| 摘要 |
A data memory in an IC card is constituted by a common data file used commonly in all applications and a plurality of application data file independently used for each application. Each data file includes a plurality of areas. Identification data is provided to the data file and the area, respectively. By checking the identification data, duplicated definition can be prevented. By using data other than identification data provided to the common data file as identification data provided to the application data file, access for areas in the common data file and the application data file can be performed in accordance with the same command data.
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