Lexmark MX722 Forms and Bar Code Card P4.2 Technical Reference - Page 53

Lexmark Confidential until announced PCL 5 emulation: Lexmark 53 A UPC-E bar code has the following physical structure: • Left-hand guard bars, or start sentinel, encoded as 101 • Six data characters, encoded from the previous parity table • Right-hand guard bars, encoded as 010101 (a center-guard bar pattern with a trailing bar) UPC-E uses the odd and the even left-hand encoding character sets from the EAN-13 encoding standard. Check characters and their number system encodings Check character Number system 0 encoding Number system 1 encoding 0 EEEOOO OOOEEE 1 EEOEOO OOEOEE 2 EEOOEO OOEEOE 3 EEOOOE OOEEEO 4 EOEEOO OEOOEE 5 EOOEEO OEEOOE 6 EOOOEE OEEEOO 7 EOEOEO OEOEOE 8 EOEOOE OEOEEO 9 EOOEOE OEEOEO The check digit is encoded in the parity of the other six characters; it does not have to be encoded explicitly. This check digit is the check digit from the original UPC-A bar code. UPC-E may be used only if the number system is 0 or 1. The characters are encoded with odd and even parity from the left-hand columns of the EAN-13 character. The parity used for each character depends on the number system (0 or 1) and the check digit from the original UPC-A bar code. 3 EAN-8 (including +2 and +5 variants) EAN-8 is the EAN equivalent of UPC-E where it provides a short bar code for small packages. It is shorter than an EAN-13 bar code, but longer than a UPC-E bar code. EAN-8 explicitly encodes all eight digits. Because the parity of the digits carries no particular significance, EAN-8 has no compatibility with UPC-E. An EAN-8 bar code is a two- or three-digit number system code followed by a four- or five-digit product code. The numbering authority assigns the EAN-8 product codes. Any company can request an EAN-8 bar code regardless of its EAN-13 manufacturer or product code. However, the EAN-8 bar codes must be stored in each database as a separate product because EAN-8 cannot be translated to EAN-13. An EAN-8 bar code has the following physical structure: a Left-hand guard bars, or start sentinel, encoded as 101 b Two number system characters, encoded as left-hand odd-parity characters c First two message characters, encoded as left-hand odd-parity characters d Center guard bars, encoded as 01010 e Last three message characters, encoded as right-hand characters f A check digit, encoded as a right-hand character g Right-hand guard bars, or end sentinel, encoded as 101 4 EAN-13 (including +2 and +5 variants)