checksum verification: the uk/plessey has one or two optional checksum digits. the checksum1 and checksum2 will be calculated as the sum module 10 or 11 of the data digits.
max./min. code length: refer to max./min. code length of code-39.
truncate leading/ending: refer to truncate leading/ending of upca.
code id setting: refer to code id setting of upca.
insertion group selection: refer to insertion group selection of upca.
