Standards

There are several standards documents covering the physical encoding of QR Code:[1]

* October 1997 — AIM International ISS QR Code
* January 1999 — JIS X 0510
* June 2000 — ISO/IEC 18004:2000 Information technology — Automatic identification and data capture techniques — Bar code symbology — QR Code (now withdrawn)
Defines QR Code Model 1 and QR Code Model 2 symbols.
* 1 September 2006 — ISO/IEC 18004:2006 Information technology — Automatic identification and data capture techniques — QR Code 2005 bar code symbology specification
Defines QR Code 2005 symbols, an extension of QR Code Model 2. Does not specify how to read QR Code Model 1 symbols, or require this for compliance.

At the application layer, there is some variation between implementations. NTT docomo has established de facto standards for the encoding of URLs, contact information, and several other data types.[2] Google's open-source "zxing" project maintains a list of QR Code data types.[3

Posted in: