| 摘要 |
PURPOSE:To reduce the memory capacity, the load, and the program generation quantity of a central computer and improve the maintainability of terminal files, by adopting the management system where hierarchical version numbers are given to files. CONSTITUTION:A central file is connected to the central computer, and terminal files are connected to terminal computers. Each file is divided to data A and B, and each data is divided to plural elements. A version number is given to each data and each element, and the file is transmitted with version numbers. If data versions on the central computer side and the terminal computer side do not coincide with each other, the terminal side performs a change element request, and the central computer selects the element (for example, element A2) having an element version higher than the data version, which the terminal computer has, to answer. Version numbers are given to files in this manner to simplify the program of the central computer and improve the maintainability of terminal files. |
