check-sum verification: the checksum of ean-8 is optional and made as the sum of the numerical value of the data digits.
max./min. code length: refer to max./min. code length of ean-13.
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.
ean-8
supplement digits: format
truncate leading zero: refer to truncate leading zero of upce.
expansion: refer to expansion of upce
