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UPC-A add-on 2/add-on 5:
The UPC-A symbology as described above can be succeeded by an additional 2 or 5
digit UPCA code. For string format see figure 3.13.
Options for UPC-A:
disable transmission of the leading zero
disable transmission of the check digit
UPC-A, No leading
zero, transmit CD
UPC-A, No leading
zero, not transmit CD
UPC-A, Leading zero,
transmit CD
UPC-A, Leading zero,
not transmit CD
3.3.2. Options for UPC-E
The UPC-E symbology is a fixed length symbology encoding 6 data digits, a check
digit and non printable start/stop characters. The following characters are supported:
the digits 0 upto 9
An optional leading digit can be transmitted, which together with the data and the
check digit forms an 8 digit field providing a compatibility with the EAN-8 format.