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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