This International Standard defines the requirements for the symbology known as QR Code 2005. It specifies the QR Code 2005 symbology characteristics, data character encoding methods, symbol formats, dimensional characteristics, error correction rules, reference decoding algorithm, production quality requirements, and user-selectable application parameters, and lists in an informative annex the features of QR Code Model 1 symbols which differ from QR Code 2005.
DS/ISO/IEC 18004:2008 history
2009DS/ISO/IEC 18004/Corr. 1:2009 Information technology - Automatic identification and data capture techniques - QR Code 2005 bar code symbology specification
2008DS/ISO/IEC 18004:2008 Information technology - Automatic identification and data capture techniques - QR Code 2005 bar code symbology specification