The history of two-dimensional code verification began in 2000, and the standards have been revised over time.
The following illustration shows how code verification standards have changed from 2000 to today. As the marking target has shifted from labels (paper) to objects such as metal and resin, new standards have been created.
Label
In addition to definitions related to the composition of codes, this standard also contains definitions related to marking quality. The version of this standard from the 2000 fiscal year is the main standard.
