The bit representation is same with Plessey:
- Wide bar following by narrow space is a "1" bit.
- Narrow bar followed by wide space is a "0" bit.
But the digit representation is more simple:
Each digit number is represented by four bit.
Except the start and stop bits, If you only calculate the bar (horizontal black line), the wide bar means ‘1’ and the narrow bar means ‘0’,
then it is the same rule as using binary to represent the digit:
Digit 0 = 0000b
Digit 1 = 0001b
Digit 2 = 0010b
Digit 3 = 0011b
...
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| 2.2.1. Character set |  | 2.3. MSI Barcode Example |
