This standard specifies such contents of 128 bar code in GS1 system (hereinafter referred to as GS1-128 Bar Code) as structure, code set, dimension of bar code symbol, quality assurance as well as application parameter, Element String encoding and decoding rules.
It is applicable to automatic identification and data collection in bar code system for commodity.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1988 Information Technology - 7-bit Coded Character Set for Information Interchange
GB/T 12508 Alphanumeric Character Sets for Optical Recognition - Part 2: Character Set OCR-B - Shapes and Dimensions of the Printed Image
GB 12904 Bar Code for Commodity - Retail Commodity Numbering and Bar Code Marking
GB/T 12905 Bar Coding Terminology
GB/T 14257 Bar Code For Commodity - Bar Code Symbol Placement Guidelines
GB/T 16986 Bar Code for Commodity - Application Identifier
GB/T 18347 Code 128
GB/T 18348 Bar Code for Commodity - Bar Code Symbol Print Quality Verification
3 Terms and Definitions
For the purposes of this document, the terms and definitions specified in GB 12904 and GB/T 12905 apply.
4 Requirements
4.1 Structure of the Bar Code Symbol
The GS1-128 Bar Code is made up as follows, reading from left to right.
a) Left Quiet Zone;
b) The Start Pattern of Double Character is: A Start Character (A, B, or C) + The Function 1 Symbol Character (FNC1)
c) One or more bar code characters representing data and special character (including the Application Identifier);
d) A Symbol Check Character;
e) The Stop Character;
f) Right Quiet Zone
The data characters represented in the symbol are shown in Human Readable Interpretation underneath or above the symbol.
Figure 1 specifies the general format of a GS1-128 Bar Code.
