Ean13 and ean8 are bar codes for european.
You can convert an ISBN or iSSN to Ean13.
My addon add a new type and can convert isbn to an EAN
and calculate th key of ean. More over in few day
add on can store the png or jpg images of bar codes
in blob type or
TODO: add upc-A upc-E ean128 and other type of bar code
Best regards
PEJAC Pascal