Data format conversion system, information administration system, information system, data format conversion method, control method of information system, program of these methods, and recording medium storing the program

A data format conversion method that converts a format of electronic data, the data format conversion method comprising:

• a storage step that stores the electronic data and data information including format information indicative of a data format of the electronic data,
• a change step that changes the data information stored in the storage step,
• a determination step that determines whether the format information is changed in the change step,
• an identification step that identifies, when it is determined in the determination step that the format information is changed, the data format using the changed format information, and
• a conversion step that converts the data format of the stored electronic data based on the data format identified in the identification step.

A non-transitory computer-readable storage medium storing a program for causing a computer to execute a data format conversion method that converts a format of electronic data, the data format conversion method comprising:

• a storage step that stores the electronic data and data information including format information indicative of a data format of the electronic data,
• a change step that changes the data information stored in the storage step,
• a determination step that determines whether the format information is changed in the change step,
• an identification step that identifies, when it is determined in the determination step that the format information is changed, the data format using the changed format information, and
• a conversion step that converts the data format of the stored electronic data based on the data format identified in the identification step.