Can you explain the barcode specification of ISO/IEC 15418?

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Yes, sure. The ISO/IEC 15418 barcode specification is also known as the GS1-128 barcode standard. This barcode standard specifies the structure and encoding of a bar code symbol that contains application identifiers (AIs) and data content to identify products, shipments, or locations, among other things.

The GS1-128 barcode consists of a series of black and white bars that represent information. It can encode up to 48 characters of data, including numeric and alphabetic characters, and a range of special characters. The barcode also includes a start character, checksum, and stop character.

The specification specifies the minimum width of the barcode bars, the ratio between the width of the narrow and wide bars, and the minimum and maximum quiet zones or blank spaces that must precede and follow the symbol.

The GS1-128 barcode is commonly used in supply chain applications such as inventory tracking, shipping, and invoicing.