The Dun-14 Barcode Symbology is based in the symbology Interleaved 2 of 5 (ITF) and it is a system for identifying containers. The format for the data is explained below.
- The code is 14 digits long and and includes the identifier for the type of container (the Packaging Indicator) and the UPC or EAN product code.
- In the case of a UPC code, a zero is added to the beginning of the manufacturer number to provide 12 digits, compatible with the EAN numbering.
- The check digit is calculated using the "modulo 10".
- The format is as follows for the data: 1001234567890 Type of container =1
- UPC Code of the product = 01234567890 (11 digits - without check digit)
- Final number = 1001234567890 X
The check digit (X) is the first position from right to the left. From the right:
- Add up the numbers in the even positions (2,4,6,8,10,12 and 14). 0 + 8 + 6 + 4 + 2 + 0 + 1 = 21
- Multiply by 3. (21 x 3 = 63)
- Add the numbers in the odd positions (3,5,7,9,11, and 13) 9 + 7 + 5 + 3 + 1 + 0 = 25
- Add with the result of the multiplication: 25 + 63 = 88
- Round up to nearest multiple of ten: 88 + X = 90
The Check Digit is the number to reach the multiple of ten: X = 2
The final number is: 10012345678902
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