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Symbol LS4278 Product Reference GuideGL-6

EAN European Article Number. This European/international

version of the UPC provides its own coding format and

symbology standards. Element dimensions are specified

metrically. EAN is used primarily in retail.

EAN/U.P.C. A fixed-length, numeric 13-digit bar code symbol consisting

of 30 dark elements and 29 intervening light elements. Each

character is represented by 2 bars and 2 spaces over 7

modules. A bar may be comprised of 1, 2, 3 or 4 modules.

Each EAN/U.P.C. symbol consists of a leading quiet zone, a

start pattern, 7 left-hand data characters, a center bar

pattern, 5 right-hand data characters, a Modulo 10 check

character, a stop pattern and a trailing quiet zone. U.P.C. is

often considered a 12-digit code. The 13th digit of EAN/

U.P.C. symbol is a derived character in the left-most

position. In the case of U.P.C., this derived left-most

character is a 0.

Element Generic term for a bar or space.

Encoded Area Total linear dimension occupied by all characters of a code

pattern, including start/stop characters and data.

Encryption Encryption is the scrambling and coding of data, typically

using mathematical formulas called algorithms, before

information is transmitted over any communications link or

network. A key is the specific code used by the algorithm to

encrypt or decrypt the data.

Error Correction A reader or decoder's use of mathematical schemes to

reconstruct or replace damaged or missing symbol

characters to enable the reading of the symbol data.

Error Detection This occurs when error-correction characters detect that

the presence of errors in the symbol exceeds the error

correction capacity, and keeps the symbol from being

decoded as erroneous data.

Error-Correction Characters Symbol characters used for error correction and detection,

calculated automatically from the other symbol characters.

Error-Correction Level An indicator of the number of characters used in a

symbology for error correction. A higher level of error

correction allows for correcting greater potential symbol

damage.

Error-Detection Characters Symbol characters reserved for error detection that are

calculated automatically from the other symbol characters.

Fixed Beam Bar Code Reader A scanning device where scanning motion is achieved by

moving the object relative to the reader; as opposed to a

moving beam reader.

GS1 DataBar Formerly RSS (Reduced Space Symbology): A family of

space efficient symbologies developed by UCC.EAN.

Guard Bars Bars located at both ends and the center of a UPC and EAN

symbol to provide reference points for scanning.

Horizontal Bar Code A bar code or symbol with an overall length dimension that

is parallel to the horizon, which resembles a picket fence.

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