本标准规定了QR码符号的要求。它规定了QR码模式2符号的特征，数据字符编码，符号格式，尺寸特征，纠错规则，参考译码算法，符号质量要求，以及可由用户选择的应用参数，在附录中给出了QR码模式1符号不同于模式2的特性。-This standard sets out the requirements of QR Code symbols. It provides a QR Code symbol Mode 2 characteristics, data character encoding, symbol formats, dimensional characteristics, error correction rules, reference decoding algorithm, symbol quality requirements, as well as by the application of the user to choose parameters, given in the appendix QR Code Mode 1 Mode 2 is different from the symbol properties.