| 摘要 |
The DOT coding method is based on individual coding of octets. To each of the 256 values of the octet corresponds a specific independent symbol. The DOT method introduces at each symbol intrinsic graphic data which serve to provide secure reading and interpretation of the symbols, such as the number of constituting black elementary graphic dots and the parity of the number of intervals. A so-called inter-character column serves to separate the characters and enables to code, beyond the octet, functions such as indexing or intrinsic specific meanings to the symbol. The various field symbols which have specific meanings are advantageously preceded by the appropriate indexing symbol and can thus be mixed at will without formatting constraints.
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