Category: Life >> Common Sense of Life

Problem Description:

How to understand the barcode, which is the pattern on the product packaging?

Analysis:

(1) The code represented by the EAN-13 barcode consists of 13 digits, and its structure is as follows:

Structure 1:

X13X12X11 X10X9X8X7 X6X5X4X3X2 X1

Among them: X13... code.

Structure 2; X13X12X11 X10X9X8X7X6 X5X4X3X2 X1

Among them: X13... Code; X1 is the check code.

In my country, when X13X12X11 is 690 and 691, the code structure is the same as structure one. When X13X12X11 is 692, the code structure is the same as structure two.

(2) EAN-8 barcode

The EAN-8 barcode is a shortened code. Its structure is relatively simple and consists of 8 digits. The details are as follows:

X8X7X6 X5X4X3X2 X1

Among them: X8X7X6 has the same meaning as the manufacturer identification code of EAN-13;

(2) Coding uniqueness check of product barcode

Uniqueness of product code. The so-called uniqueness refers to the one-to-one correspondence between a commodity item and its identification code, that is, a commodity item has only one code, and a code only identifies one commodity item. Products of different types, sizes, packaging, and colors are considered different product items, and different product item codes must be compiled to ensure the uniqueness of the product code.