BS ISO IEC 15420 pdf – Information technology — Automatic identification and data capture techniques — EAN/UPC bar code symbology specification

BS ISO IEC 15420 pdf – Information technology — Automatic identification and data capture techniques — EAN/UPC bar code symbology specification
1Scope
This International Standard specifies the requirements for the bar code symbology known as EANUPC. Itspecifies EAN/UPC symbology characteristics, data character encodation, dimensions, tolerances, decodingalgorithms and parameters to be defined by applications. It specifies the Symbology ldentifier prefix stringsfor EAN/UPC symbols.
Data content and the rules governing the use of this symbology are outside the scope of this InternationalStandard; they are defined in the Gsi General Specifications (see bibliography).
2Normative references
The following referenced documents are indispensable for the application of this document.For datedreferences，only the edition cited applies. For undated references，the latest edition of the referenceddocument (including any amendments) applies.
ISO/IEC 646:1991, Information technology—IlSO 7-bit coded character set for information interchange
ISO/IEC 15416,Information technology — Automatic identification and data capture techniques— Bar codeprint quality test specification —Linear symbols
ISO/IEC 19762-1，Information technology —Automatic identification and data capture (AIDC) techniques —Harmonized vocabulary-Part 1 : General terms relating to AIDC
ISOIEC 19762-2,Information technology —Automatic identification and data capture (AIDC) techniques —Harmonized vocabulary —Part 2: Optically readable media (ORM)
3Terms and definitions
For the purposes of this document, the terms and definitions given in lSOIEC 19762-1, ISO/IEC 19762-2 andthe following apply.
3.1
add-on symbol
symbol used to encode information supplementary to that in the main symbol which it accompanies
3.2
auxiliary pattern
pattern of bars/spaces representing non-data components of the symbolEXAMPLE
guard patterns and inter-character delineators
3.3
delineator
auxiliary pattern used to separate characters within an add-on symbol
3.4
even parity
characteristic of the encodation of a symbol character whereby the character contains an even number of darkmodules
3.5
GS1 member organization
agency responsible for the administration of the GS1 system and maintenance of a number bank within adefined territory
3.6
GS1 System
specifications,standards, and guidelines administered by Gs1
3.7
GTIN
Global Trade ltem Number
number that is used for the unique identification of trade items worldwide and which may be 8,12,13 or 14digits in length
3.8
guard pattern
auxiliary pattern of bars/spaces corresponding to start or stop patterns in other symbologies, or serving toseparate the two halves of a symbol
3.9
magnification factor
constant multiplier of the nominal dimensions of an EAN/UPC symbol
3.10
number set
series of ten barlspace patterns of either even or odd parity encoding the digits 0 to 9
3.11
odd parity
characteristic of the encodation of a symbol character whereby the character contains an odd number of darkmodules
3.12
variable parity encodation
process of encoding additional information in a series of symbol characters by using particular combinations ofodd and even parity characters to implicitly encode digits or for checking purposes
3.13
zero-suppression
process of removing zeroes from specified positions in a GTIN-12 data string in order to encode it in UPC-Eformat