This standard specifies the general bar code symbol terms and interpretations. This standard applies to research and application fields related to bar code technology. GB/T 12905-1991 Bar code system general terminology Bar code symbol terminology GB/T12905-1991 Standard download decompression password: www.bzxz.net
This standard specifies the general bar code symbol terms and interpretations. This standard applies to research and application fields related to bar code technology.

National Standard of the People's Republic of China
Common terminology used in bar code system
Terms for bar code symbols
Definition of common terminology used in bar code systemTerms for bar code aymbol
1 Subject content and scope of application
This standard specifies the common terminology and interpretation of bar code symbols. This standard applies to research and application fields related to bar code technology: 2 Basic terminology
2. 1 Bar code
GE 12905-91
A mark composed of a group of regularly arranged bars, spaces and their corresponding characters, used to represent certain information. Synonyms bar code symbol bar code symbol 2. 2 Bar code system bat code system An automatic recognition system composed of bar code symbol design: production and scanning and reading. 2.3 Bar
The part of a bar code with low reflectivity.
2. 4 Space
The part of a bar code with high reflectivity.
2.5Clear area
A limited area with the same reflectivity as the space on the left and right sides of the barcode. 2.6Bearer bar
A border or edge surrounding the barcode with the same reflectivity as the barcode. 2.7Start character
Several bars and spaces located at the beginning of the barcode. Stop character
Several bars and spaces located at the end of the barcode. 2.9Central seperating characterSeveral bars and spaces located in the middle of the barcode. 2,10Bar code characterBar code character represents a barcode character.
2.11Bar code data characterBar code character representing specific information.
2.12Bar code check characterBar code character representing the check code.
Approved by the State Administration of Technical Supervision on 1991-05-17 and implemented on 1992-01-01
2.13 Barcode filler character Barcode character that does not represent specific information.
2.14 Bur height
GB 12905-91
The longitudinal dimension of the two-dimensional dimension of the bar constituting the barcode character. 2.15 Bar width
The transverse dimension of the one-dimensional dimension of the bar constituting the barcode character. 2.16 Space widthWww.bzxZ.net
The transverse dimension of the two-dimensional dimension of the space constituting the barcode character. 2.17 Bar width ratio Barcode width ratio The ratio of the width of the widest bar to the narrowest bar. 2.18
Space width ratio Space width tatia
The ratio of the width of the widest space to the narrowest space in the barcode. 2.79Barcode length
The length from the leading edge of the barcode start character to the trailing edge of the barcode terminator. 2.20Length to height ratioThe ratio of the barcode length to the bar height.
Barcode purity
The number of characters represented by a barcode of unit length. 2.22
Module
The basic unit that makes up a barcode.
Barcode intercharacter gapThe area between adjacent barcode characters that does not represent specific information and has the same reflectivity as the space. 2.24
Elemcnt
The bars and spaces that make up the barcode characters.
Continuous barcodecontinucx barode
A barcode without barcode character spacing.
Discrete barcodeDiscrete barcodeA barcode with barcode character gaps.
Bidirectional bar codebidirectianal bar code2.27
Both ends of the bar code can be used as the starting point of scanning. 2.28
add-on
Bar code indicating additional information.
self-checking bar codeself-checking bar code2.29
Bar code with the bar code character itself having the function of checking. 2.30fixed length of bar codebar code with a fixed number of bar code characters.
2. 31unfixed length of bar codebar code with an unfixed number of bar code characters.
2.32bar codic character setbar codic character setcharacter set that can be represented by a certain type of bar code. 3.1 UPC barcode Universal Product Code GB 12905-91 A barcode developed by the United States Uniform Code Council Example 1: Figure 1 CPC barcode code 012315678905 3.2 EAN barcode European Article Number Bar Code A barcode developed by the International Article Numbering Association. Example 2: 61901234367892 Figure 2 EAN barcode code 6901234567892 3.3 2of5barcode 2of5barcode is a non-continuous barcode with only one bar representing information. The barcode character is composed of five bars arranged in a regular pattern, of which two are wide and the rest are narrow units.
The character set represented: digits 0 to 9.
Example shown in Figure 3:
123458
Figure 3 Interlaced 2 of 5 barcode code 123458
3.4 ​​Interlaced 2 of 5 barcode A variant of the 2 of 5 barcode. It is a continuous barcode in which both bars and spaces represent information. The tea code characters on the adjacent odd and even positions are respectively represented by five bars and five spaces interlaced.
The character set represented: digits 0 to 9
Example shown in Figure 4:
123456
Figure 4 Interlaced 2 of 9 barcode code 123456
3. 5 3 of 9 barcode GB12905-91
A non-continuous barcode in which both bars and spaces represent information. The barcode characters are composed of five bars and four spaces arranged regularly, a total of nine units. Among them, there are three wide units, and the rest are narrow units. The character set represented: numbers 0~~9;
letters AZ;
special characters··, space, *, $, /, ten, %. As shown in Figure 5:
Figure 5 Code B2C3 Blue Nine Barcode
3.6 Codabar bar code is a non-continuous bar code in which bars and spaces represent interest. The barcode characters are composed of four bars and three spaces arranged regularly, a total of seven units. Among them, there are two or three wide units, and the rest are narrow units. Character set represented: Numbers 0 to 9;
Letters A to D;
Special symbols ten, one, $,,/,·
Example shown in Figure 6:
A12345678B
Figure 6 Codabar barcode with code A12345678B Additional instructions:
This standard is proposed by China Article Coding Center. This standard is drafted by China Article Coding Center. The main drafters of this standard are Wu Hailian, Kang Shuguo, Hu Jiazhang and Zhao Nan.
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