| 摘要 |
PROBLEM TO BE SOLVED: To provide a diagram editor and a method for preparing a circuit diagram for reducing the size of a data base. SOLUTION: The same information is described only in a data base 11 so that the same information can not be overlapped, and the size of the data base can be reduced. Also, the same information is described only in the data base 11 and each symbol is structured so that information defined for each feature of the symbol can be referred to. Therefore symbols whose structures should be partially same are structured so that the same place can be necessarily referred to, and the shapes of plural symbols can be defined as the same. Also, the shapes of all the symbols can be easily changed by changing only the data base 11 in which the information of the shapes is described.
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