Lexmark X925 Forms and Bar Code Card Technical Reference Guide - Page 62

f Check digit, encoded as right-hand character g Right-hand guard bars, or end sentinel, encoded as 101 4 EAN-13 (including +2 and +5 variants) EAN-13, based on the UPC-A standard, was implemented by the International Article Numbering Association (EAN) in Europe. The only difference between a UPC-A symbol and an EAN-13 symbol is that the number system code is two digits long in EAN-13 as opposed to one digit in UPC-A. An EAN-13 bar code has the following physical structure: a Left-hand guard bars, or start sentinel, encoded as 101 b The second character of the number system code, encoded as described in the following table c The five characters of the manufacturer code, encoded as described in the following table d Center guard pattern, encoded as 01010 e The five characters of the product code, encoded as right-hand characters, described in the following table f Check digit, encoded as a right-hand character, described in the following table g Right-hand guard bars, or end sentinel, encoded as 101 Digit 0 1 2 3 4 5 6 7 8 9 Left-hand encoding Odd parity (A) Even parity (B) 0001101 0100111 0011001 0110011 0010011 0011011 0111101 0100001 0100011 0011101 0110001 0111001 0101111 0000101 0111011 0010001 0110111 0001001 0001011 0010111 Right-hand encoding All 1110010 1100110 1101100 1000010 1011100 1001110 1010000 1000100 1001000 1110100 The characters that are encoded to the left of the center guard pattern are considered the "left hand side" of the symbol whereas all characters encoded to the right of the center guard pattern are considered the "right hand side" of the symbol. The first character of the EAN-13 number system code (i.e., the first digit of the EAN-13 value) is encoded in the parity of the characters of the left-hand side of the symbol. The value Composite bar codes 59