ISO/IEC 21471:2020
(Main)Information technology — Automatic identification and data capture techniques — Extended rectangular data matrix (DMRE) bar code symbology specification
Information technology — Automatic identification and data capture techniques — Extended rectangular data matrix (DMRE) bar code symbology specification
This document defines the requirements for the symbology known as extended rectangular data matrix (DMRE). It specifies the DMRE code symbology characteristics, data character encodation, symbol formats, dimensions and print quality requirements, error correction rules, decoding algorithm, and user-selectable application parameters. It applies to all DMRE code symbols produced by any printing or marking technology. Original data matrix code sizes are not covered by this document but defined in ISO/IEC 16022 using the same matrix placement, decoding and error correction algorithm.
Technologies de l'information – Techniques de l'identification et de saisie de données automatiques – Data Matrix Rectangulaire Etendu (DMRE) spécification de symbologie de code à barres
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INTERNATIONAL ISO/IEC
STANDARD 21471
First edition
2020-02
Information technology — Automatic
identification and data capture
techniques — Extended rectangular
data matrix (DMRE) bar code
symbology specification
Technologies de l'information – Techniques de l'identification et de
saisie de données automatiques – Data Matrix Rectangulaire Etendu
(DMRE) spécification de symbologie de code à barres
Reference number
©
ISO/IEC 2020
© ISO/IEC 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2020 – All rights reserved
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms and mathematical/logical notations.1
3.1 Terms and definitions . 1
3.2 Symbols and abbreviated terms. 2
3.3 Mathematical/logical notations . 2
4 Symbol description . 2
4.1 Basic characteristics . 2
4.2 Summary of additional features . 3
4.3 Symbol structure . 3
4.3.1 General. 3
4.3.2 Finder pattern . 4
4.3.3 Symbol sizes and capacities . 4
5 DMRE code requirements . 4
5.1 Encoding procedure overview. 4
5.2 Data encodation . 5
5.2.1 Overview . 5
5.2.2 Default character interpretation . 5
5.2.3 ASCII encodation . 5
5.2.4 Symbology control characters . 6
5.2.5 C40 encodation. 8
5.2.6 Text encodation . 9
5.2.7 ANSI X12 encodation. 9
5.2.8 EDIFACT encodation .10
5.2.9 Base 256 encodation .11
5.3 User considerations .12
5.3.1 General.12
5.3.2 User selection of extended channel interpretation .12
5.3.3 User selection of symbol size and shape .12
5.4 Extended channel interpretation .12
5.4.1 General.12
5.4.2 Encoding ECIs .12
5.4.3 ECIs and Structured append .13
5.4.4 Post-decode protocol .13
5.5 DMRE code symbol attributes .13
5.5.1 Symbol sizes and capacity .13
5.5.2 Insertion of alignment patterns into larger symbols .14
5.6 Structured append .14
5.6.1 Basic principles .14
5.6.2 Symbol sequence indicator .14
5.6.3 File identification .15
5.6.4 FNC1 and Structured append .15
5.6.5 Buffered and unbuffered operation .15
5.7 Error detection and correction .16
5.7.1 Reed-Solomon error correction .16
5.7.2 Generating the error correction codewords .16
5.7.3 Error correction capacity .17
5.8 Symbol construction .17
5.8.1 General.17
5.8.2 Symbol character placement .17
© ISO/IEC 2020 – All rights reserved iii
5.8.3 Alignment pattern module placement .18
5.8.4 Finder pattern module placement .18
6 Symbol dimensions .18
6.1 Dimensions .18
7 Symbol quality .18
7.1 General .18
7.2 Symbol quality parameters .19
7.2.1 Fixed pattern damage .19
7.2.2 Scan grade and overall symbol grade.19
7.2.3 Grid non-uniformity .19
7.2.4 Decode .19
7.3 Process control measurements.19
8 Reference decode algorithm for DMRE .19
9 User guidelines .29
9.1 Human readable interpretation .29
9.2 Autodiscrimination capability .29
9.3 System considerations .29
10 Transmitted data .29
10.1 General .29
10.2 Protocol for FNC1 .29
10.3 Protocol for FNC1 in the second position .30
10.4 Protocol for Macro characters in the first position .30
10.5 Protocol for ECIs .
...
INTERNATIONAL ISO/IEC
STANDARD 21471
First edition
2020-02
Information technology — Automatic
identification and data capture
techniques — Extended rectangular
data matrix (DMRE) bar code
symbology specification
Technologies de l'information – Techniques de l'identification et de
saisie de données automatiques – Data Matrix Rectangulaire Etendu
(DMRE) spécification de symbologie de code à barres
Reference number
©
ISO/IEC 2020
© ISO/IEC 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2020 – All rights reserved
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms and mathematical/logical notations.1
3.1 Terms and definitions . 1
3.2 Symbols and abbreviated terms. 2
3.3 Mathematical/logical notations . 2
4 Symbol description . 2
4.1 Basic characteristics . 2
4.2 Summary of additional features . 3
4.3 Symbol structure . 3
4.3.1 General. 3
4.3.2 Finder pattern . 4
4.3.3 Symbol sizes and capacities . 4
5 DMRE code requirements . 4
5.1 Encoding procedure overview. 4
5.2 Data encodation . 5
5.2.1 Overview . 5
5.2.2 Default character interpretation . 5
5.2.3 ASCII encodation . 5
5.2.4 Symbology control characters . 6
5.2.5 C40 encodation. 8
5.2.6 Text encodation . 9
5.2.7 ANSI X12 encodation. 9
5.2.8 EDIFACT encodation .10
5.2.9 Base 256 encodation .11
5.3 User considerations .12
5.3.1 General.12
5.3.2 User selection of extended channel interpretation .12
5.3.3 User selection of symbol size and shape .12
5.4 Extended channel interpretation .12
5.4.1 General.12
5.4.2 Encoding ECIs .12
5.4.3 ECIs and Structured append .13
5.4.4 Post-decode protocol .13
5.5 DMRE code symbol attributes .13
5.5.1 Symbol sizes and capacity .13
5.5.2 Insertion of alignment patterns into larger symbols .14
5.6 Structured append .14
5.6.1 Basic principles .14
5.6.2 Symbol sequence indicator .14
5.6.3 File identification .15
5.6.4 FNC1 and Structured append .15
5.6.5 Buffered and unbuffered operation .15
5.7 Error detection and correction .16
5.7.1 Reed-Solomon error correction .16
5.7.2 Generating the error correction codewords .16
5.7.3 Error correction capacity .17
5.8 Symbol construction .17
5.8.1 General.17
5.8.2 Symbol character placement .17
© ISO/IEC 2020 – All rights reserved iii
5.8.3 Alignment pattern module placement .18
5.8.4 Finder pattern module placement .18
6 Symbol dimensions .18
6.1 Dimensions .18
7 Symbol quality .18
7.1 General .18
7.2 Symbol quality parameters .19
7.2.1 Fixed pattern damage .19
7.2.2 Scan grade and overall symbol grade.19
7.2.3 Grid non-uniformity .19
7.2.4 Decode .19
7.3 Process control measurements.19
8 Reference decode algorithm for DMRE .19
9 User guidelines .29
9.1 Human readable interpretation .29
9.2 Autodiscrimination capability .29
9.3 System considerations .29
10 Transmitted data .29
10.1 General .29
10.2 Protocol for FNC1 .29
10.3 Protocol for FNC1 in the second position .30
10.4 Protocol for Macro characters in the first position .30
10.5 Protocol for ECIs .
...
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