SANS 16390-2008 Information technology - Automatic identification and data capture techniques - Interleaved 2 of 5 bar code symbology specification《信息技术 自动识别及数据采集技术 交叉2 5条码符号表示法规范》.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21846-1 SANS 16390:2008Edition 2 ISO/IEC 16390:2007Edition 2SOUTH AFRICAN NATIONAL STANDARD Information technology Automatic identificatio

4、n and data capture techniques Interleaved 2 of 5 bar code symbology specification This national standard is the identical implementation of ISO/IEC 16390:2007 and is adopted with the permission of the International Organization for Standardization and the International Electrotechnical Commission. P

5、ublished by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 16390:2008 Edition 2 ISO/IEC 16390:2007 Edition 2 Table of changes Change No. Date Scope National

6、 foreword This South African standard was approved by National Committee StanSA SC 71K, Information technology Automatic identification and data capture techniques, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was pu

7、blished in August 2008. This SANS document supersedes SANS 16390:1999 (edition 1). Reference numberISO/IEC 16390:2007(E)ISO/IEC 2007INTERNATIONAL STANDARD ISO/IEC16390Second edition2007-06-15Information technology Automatic identification and data capture techniques Interleaved 2 of 5 bar code symbo

8、logy specification Technologies de linformation Techniques didentification automatique et de capture des donnes Spcifications des symbologies des codes barres, code 2 parmi 5 entrelac SANS 16390:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the S

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12、address given below. COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ei

13、ther ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2007 All rights reservedSANS 16390:2008Th

14、is s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Requirements.1 4.1 Symbology char

15、acteristics .1 4.2 Symbol structure .2 4.3 Character encodation2 4.4 Dimensions.5 4.5 Reference decode algorithm 6 4.6 Symbol quality .6 4.7 Application-defined parameters.7 Annex A (informative) Additional features .9 Annex B (informative) Guidelines for the use of Interleaved 2 of 5 .11 Annex C (n

16、ormative) Symbology identifier 14 Annex D (informative) Examples of application-defined parameters 15 Bibliography 17 SANS 16390:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 16390:2007(E) iv ISO/IEC 2007 All rights reservedFore

17、word ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical

18、committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in

19、the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare Internatio

20、nal Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of th

21、e elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 16390 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 31, Automatic identification and da

22、ta capture techniques. This second edition cancels and replaces the first edition (ISO/IEC 16390:1999), which has been technically revised. SANS 16390:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 16390:2007(E) ISO/IEC 2007 All

23、rights reserved vIntroduction The technology of bar coding is based on the recognition of patterns encoded in bars and spaces of defined dimensions. There are numerous methods of encoding information in bar code form, known as symbologies. Interleaved 2 of 5 is one such symbology. The rules defining

24、 the translation of characters into bar and space patterns and other essential features are known as the symbology specification. In the past, symbology specifications were developed and published by a number of organizations, resulting in certain instances in conflicting requirements for certain sy

25、mbologies. Manufacturers of bar code equipment and users of bar code technology require publicly available standard symbology specifications to which they can refer when developing equipment and application standards. SANS 16390:2008This s tandard may only be used and printed by approved subscriptio

26、n and freemailing clients of the SABS .SANS 16390:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved 1Information technology Automatic identification and data capt

27、ure techniques Interleaved 2 of 5 bar code symbology specification 1 Scope This International Standard specifies the requirements for the bar code symbology known as Interleaved 2 of 5; it specifies Interleaved 2 of 5 symbology characteristics, data character encodation, dimensions, tolerances, deco

28、ding algorithms and parameters to be defined by applications. It specifies the Symbology Identifier prefix strings for Interleaved 2 of 5 symbols. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition

29、cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 646, Information technology ISO 7-bit coded character set for information interchange ISO/IEC 15416, Information technology Automatic identification and data capture technique

30、s Bar code print quality test specification Linear symbols ISO/IEC 15424, Information technology Automatic identification and data capture techniques Data carrier identifiers (including Symbology Identifiers) ISO/IEC 19762-1, Information technology Automatic identification and data capture (AIDC) te

31、chniques Harmonized vocabulary Part 1: General terms relating to AIDC ISO/IEC 19762-2, Information technology Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 2: Optically readable media (ORM) 3 Terms and definitions For the purposes of this document, the terms

32、and definitions given in ISO/IEC 19762-1 and ISO/IEC 19762-2 apply. 4 Requirements 4.1 Symbology characteristics The characteristics of Interleaved 2 of 5 are: a) Encodable character set: numeric 0 to 9 (ASCII characters 48 - 57 inclusive, in accordance with ISO/IEC 646); b) Code type: continuous; S

33、ANS 16390:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 16390:2007(E) 2 ISO/IEC 2007 All rights reservedc) Elements per symbol character: 5, of which 2 wide and 3 narrow, encoded as either five bars or five spaces; d) Character

34、self-checking: yes; e) Data string length encodable: variable (even number of digits); f) Bidirectionally decodable: yes; g) Symbol check character: one, optional (see annex A); h) Symbol character density: 14 to 18 modules per symbol character pair, depending on wide/narrow ratio; i) Non-data overh

35、ead: 8 to 9 modules, depending on wide/narrow ratio. 4.2 Symbol structure Interleaved 2 of 5 symbols shall comprise: a) leading quiet zone; b) start pattern; c) one or more pairs of symbol characters representing data (inclusive of optional symbol check character); d) stop pattern; e) trailing quiet

36、 zone. 4.3 Character encodation 4.3.1 Symbol character structure Data is encoded as interleaved pairs of symbol characters, the first of which comprises two wide and three narrow bars and the second of which comprises two wide and three narrow spaces, the first bar of the first character being follo

37、wed by the first space of the second character, then the second bar of the first character and the second space of the second character, and so on until the last space of the second character, which is directly followed by the first bar of the next symbol character pair (or stop pattern). 4.3.2 Data

38、 character encodation Table 1 defines the Interleaved 2 of 5 character encodation. In the columns headed “Binary representation“ the character 1 is used to represent a wide element and 0 a narrow element. SANS 16390:2008This s tandard may only be used and printed by approved subscription and freemai

39、ling clients of the SABS .ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved 3Table 1 Binary representation of character encodation Data character Binary representation 0 0 0 1 1 0 1 1 0 0 0 1 2 0 1 0 0 1 3 1 1 0 0 0 4 0 0 1 0 1 5 1 0 1 0 0 6 0 1 1 0 0 7 0 0 0 1 1 8 1 0 0 1 0 9 0 1 0 1 0 Table 1

40、 uses a modified binary coded decimal encoding scheme. The four left-most bit positions for each character are assigned weights of 1, 2, 4 and 7, from left to right; the fifth position is used for an even parity bit. The sum of the positional weights of the 1 bits is equivalent to the data character

41、 value, except in the case of the data character 0, where the weights 4 and 7 are applied. The parity bit ensures that there are always two 1 bits per character. The following algorithm defines the rules to convert numeric data into the symbol characters of an Interleaved 2 of 5 symbol: Step in Algo

42、rithm Example 1) Calculate check character if required by the application standard. See 4.7; 2) If the data string, including check characters, has an odd number of digits, add a leading zero; which becomes 367 0367 3) Subdivide the numeric string into digit pairs; which becomes 0367 03 and 67 4) En

43、code each digit pair in turn as follows: a) Encode the leading digit of the pair into a pattern of bars as shown in Table 1; b) Encode the second digit of the pair into a pattern of spaces as shown in Table 1; 0 (binary pattern 00110) 3 (binary pattern 11000) 5) Form each symbol character pair by ta

44、king the bar and space elements alternately from the patterns derived from steps 4 a) and 4 b), commencing with the first bar of the pattern for the first digit, followed by the first space of the pattern for the second digit. Binary pattern 0101101000 Figure 1 illustrates the sequence of bar and sp

45、ace elements corresponding to the data character pairs “03 67“. SANS 16390:2008This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO/IEC 16390:2007(E) 4 ISO/IEC 2007 All rights reserved06NEXT CHAR.37Figure 1 Interleaved 2 of 5 character pairs,

46、encoding “03 67“ 4.3.3 Start and stop patterns The start pattern shall consist of four narrow elements in the sequence bar - space - bar - space. The stop pattern shall consist of a wide bar - narrow space - narrow bar sequence. The start pattern shall be positioned at the normal left end of the dat

47、a symbol characters adjacent to the first bar of the most significant digit. The stop pattern shall be positioned at the normal right end of the data symbol characters adjacent to the final space of the least significant digit. There is no assigned human readable interpretation of the start and stop

48、 patterns and they shall not be transmitted by the decoder. Figure 2 illustrates the start and stop patterns and their relationship to the symbol data characters. Quiet zone First char. Last char. Quiet zoneSTART STOPFigure 2 Start and stop patterns SANS 16390:2008This s tandard may only be used and

49、 printed by approved subscription and freemailing clients of the SABS .ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved 5Figure 3 illustrates a complete Interleaved 2 of 5 bar code symbol for the data “1234“ showing the necessary quiet zones. Quiet zone Start 1st character pair 2nd character pair Stop Quiet zone1234Figure 3 Interleaved 2 of 5 symbol inclusive of quiet zones 4.3.4 Optional symbol check character Annex A defines the check character position and calculation. 4.4 Dim