European standard for items sold to the public, EAN-13 contains numeric data only and encodes 13 digits number. The first two are the country code, the next 6 digits are the supplier ID, the next 4 digits are the product number and the last one is the required checksum character (this split varies from country to country). You do not need to specify the checksum digit as BarDIMM Pro and BarDIMM Box recalculate it. If the checksum is sent as a 13th digit, it is ignored and recalculated.
A digit is described by 2 bars and 2 spaces and its width is calculated as 7 thin bars.
The number character is printed as text on the left side or the bar code and the checksum on the right side.
All the EAN and UPC codes can be followed with two or five digits of supplemental information