INTERNATIONAL ISO/IEC STANDARD 23941 First edition 2022-05 Information technology Automatic identification and data capture techniques Rectangular Micro QR Code (rMQR) bar code symbology specification Technologies de I'information - Techniques d'identification automatique et de capture des données - Spécification de la symbologie de code a barres Rectangular Micro QR Code (rMQR) Reference number IEC IS0/IEC23941:2022(E) ISO @ IS0/IEC 2022 IS0/IEC 23941:2022(E) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, withoutpriorwrittenpermission.Permission can be requested from eitherIso at the addressbelow or Iso's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org PublishedinSwitzerland i @ IS0/IEC 2022 - All rights reserved IS0/IEC 23941:2022(E) Contents Page Foreword .V Introduction. ..vi 1 Scope. .1 2 Normative references ..1 3 Terms and definitions. ..1 4 Mathematical and logical symbols, abbreviated terms and conventions .3 4.1 Mathematical and logical symbols .3 4.2 Abbreviated terms .3 4.3 Conventions.. 3 4.3.1 Module positions 3 4.3.2 Byte notation 3 4.3.3 Version references. 3 5 Conformance .4 6 rMQR specifications. .4 6.1 Basic characteristics 4 6.2 Summary of additional features 5 6.3 Symbol structure. .5 6.3.1 General .5 6.3.2 Symbol Versions and sizes 8 6.3.3 Finder pattern. 10 6.3.4 Separator. 10 6.3.5 Timing pattern. 10 6.3.6 Alignment patterns. 11 6.3.7 Finder sub pattern .11 6.3.8 Corner finder pattern 12 6.3.9 Encoding region 12 6.3.10 Quietzone.. 13 7 Requirements. .13 7.1 Encode procedure overview. 13 7.2 Data analysis. 14 7.3 Modes 15 7.3.1 General 15 7.3.2 Extended channel interpretation (ECI) mode 15 7.3.3 Numeric mode 15 7.3.4 Alphanumeric mode 15 7.3.5 Bytemode. 15 7.3.6 Kanji mode .16 7.3.7 Mixing modes 16 7.3.8 FNC1 mode 16 7.4 Data encoding. 16 7.4.1 Sequence of data .16 7.4.2 Extended channel interpretation (ECI) mode 18 7.4.3 Numeric mode. 20 7.4.4 Alphanumeric mode 21 7.4.5 Byte mode. 22 7.4.6 Kanji mode 22 7.4.7 Mixing modes 23 7.4.8 FNC1 modes. 24 7.4.9 Terminator 25 7.4.10 Bit stream to codeword conversion 25 7.5 Error correction. 28 7.5.1 Error correction capacity 28 @ IS0/IEC 2022 - All rights reserved ii IS0/IEC 23941:2022(E) 7.5.2 Generating the error correction codewords .31 7.6 Constructingthefinalmessagecodewordsequence .32 7.7 Codeword placement in matrix. .33 7.7.1 Symbol character representation. .33 7.7.2 Function pattern placement .33 7.7.3 Symbol character placement .33 7.8 Data masking 37 7.8.1 General .37 7.8.2 Data mask patterns .37 7.9 Format information .37 8 Symbol printing and marking. .39 8.1 Dimensions .39 8.2 Human-readable interpretation .39 8.3 Marking guidelines. .40 9 Symbol quality .40 9.1 Methodology .40 9.2 Symbol quality parameters .40 9.2.1 Fixed pattern damage. ..40 9.2.2 Scan grade and overall symbol grade ..40 9.2.3 Grid non-uniformity.. .40 9.3 Process control measurements ..40 10 Decoding procedure overview .40 11 Reference decode algorithm ..41 12 Auto-discrimination capability ..52 13 Transmitted data .52 13.1 General principles. .52 13.2 Symbologyidentifier .52 13.3 Extended channel interpretations .52 13.4 FNC1 .53 Annex A (normative) Error detection and correction generator polynomials ..54 Annex B (normative) Error correction decoding steps ..56 AnnexC(normative)Formatinformation ..58 Annex D (normative) Position of alignment patterns ..61 Annex E (normative) Symbology identifier ..62 Annex F (normative) rMQR print quality - symbology - specific aspects ..63 AnnexG(normative)Bvtemodecharactersets .69 Annex H (informative) JIS8 and Shift JIS character sets ..70 Annex I (informative) Symbol encoding examples. ..72 Annex J (informative) User guidelines for printing and sc