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dBest Barcode Font Library - Interleaved 2/5
The barcode Interleaved 2/5 allows use of the full numeric character set, and different start and stop patterns. Interleaved 2/5 symbols always contain an even number of digits. Each Interleaved 2/5 symbol consists of a leading quiet zone, a start pattern, symbol characters representing the data, a stop pattern and a trailing quiet zone. Each symbol is formed from a series of one or more data character pairs. Each pair is coded into a series of five bars and five spaces with the bars representing the more significant digit of the pair while the white spaces represent the less significant digit. Since Interleaved 2/5 symbols are created from data pairs, the number to be encoded must have an even number of digits. Should a number containing an odd number need to be encoded, a leading zero must be added. Special start and stop patterns are necessary to identify the leading and trailing ends of the barcode symbol. Quiet zones are spaces preceding the start pattern and following the stop pattern.
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