![]() Usually the sub type selection and switching within a symbol is handled by the barcode software thatįor reference we are including the bar patterns of the three start- and the single stop-character here. The code set to use is indicated to the scanner by the start symbol or start character.Īlso available are various mode switching or shift characters to switch from one set to another within a barcode symbol. ![]() The code sets differ in compactness and encodable character set.Ĭode 128 A: Partial ASCII set, no lower case, but ASCII control chars (TAB, CR/LF etc.)Ĭode 128 B: Full ASCII set, no ASCII control charsĬode 128 C: Only digits 0-9, encoded in pairs, very compact code Three different code sets or sub types are defined for Code 128 (namely Code 128 A, Code 128 B, and Code 128 C) that determine how the code is interpreted by the barcode scanner. Code 128 code sets A, B, C and start characters As the code is rather old, the Code 128 specs are freely available online, for example in the Wikipedia article on Code 128. ![]()
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