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1、 Reference number ISO/IEC 16390:2007(E) ISO/IEC 2007 INTERNATIONAL STANDARD ISO/IEC 16390 Second edition 2007-06-15 Information technology Automatic identification and data capture techniques Interleaved 2 of 5 bar code symbology specification Technologies de linformation Techniques didentification
2、automatique et de capture des donnes Spcifications des symbologies des codes barres, code 2 parmi 5 entrelac Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo
3、 reproduction or networking permitted without license from IHS -,-,- ISO/IEC 16390:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are l
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6、ng to it is found, please inform the Central Secretariat at the 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 p
7、hotocopying and microfilm, without permission in writing from either 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
8、Switzerland ii ISO/IEC 2007 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without license from IH
9、S -,-,- ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope 1 2 Normative references1 3 Terms and definitions .1 4 Requirements.1 4.1 Symbology characteristics.1 4.2 Symbol structure .2 4.3 Character encodation2 4.4 Dimensions.5 4.5 Reference d
10、ecode 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 (normative) Symbology identifier 14 Annex D (informative) Examples of application-defined parameter
11、s15 Bibliography17 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 16390:2007(E)
12、 iv ISO/IEC 2007 All rights reserved Foreword 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 I
13、nternational Standards through technical 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 lia
14、ison with ISO and IEC, also take part in 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 tec
15、hnical committee is to prepare International 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
16、 drawn to the possibility that some of the 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, Subcommitt
17、ee SC 31, Automatic identification and data capture techniques. This second edition cancels and replaces the first edition (ISO/IEC 16390:1999), which has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/
18、1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved v Introduction The technology of bar coding is based on the recognition of patterns encoded in bars and
19、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 the translation of characters into bar and space patterns and other essential features are known as the symbology spec
20、ification. In the past, symbology specifications were developed and published by a number of organizations, resulting in certain instances in conflicting requirements for certain symbologies. Manufacturers of bar code equipment and users of bar code technology require publicly available standard sym
21、bology specifications to which they can refer when developing equipment and application standards. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduct
22、ion or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without lice
23、nse from IHS -,-,- INTERNATIONAL STANDARD ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved 1 Information technology Automatic identification and data capture techniques Interleaved 2 of 5 bar code symbology specification 1 Scope This International Standard specifies the requirements for the ba
24、r code symbology known as Interleaved 2 of 5; it specifies Interleaved 2 of 5 symbology characteristics, data character encodation, dimensions, tolerances, decoding algorithms and parameters to be defined by applications. It specifies the Symbology Identifier prefix strings for Interleaved 2 of 5 sy
25、mbols. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 646, Informatio
26、n technology ISO 7-bit coded character set for information interchange ISO/IEC 15416, Information technology Automatic identification and data capture techniques Bar code print quality test specification Linear symbols ISO/IEC 15424, Information technology Automatic identification and data capture t
27、echniques Data carrier identifiers (including Symbology Identifiers) ISO/IEC 19762-1, Information technology Automatic identification and data capture (AIDC) techniques Harmonized vocabulary Part 1: General terms relating to AIDC ISO/IEC 19762-2, Information technology Automatic identification and d
28、ata capture (AIDC) techniques Harmonized vocabulary Part 2: Optically readable media (ORM) 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 19762-1 and ISO/IEC 19762-2 apply. 4 Requirements 4.1 Symbology characteristics The characteristics of Inte
29、rleaved 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; Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=DAWSO
30、N, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 16390:2007(E) 2 ISO/IEC 2007 All rights reserved c) Elements per symbol character: 5, of which 2 wide and 3 narrow, encoded as either five bars or five spaces; d) Character
31、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
32、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
33、 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
34、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
35、 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. Copyright International Organization for Standardization Provided by IHS under license with ISO
36、 Licensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved 3 Table 1 Binary representation of character encodation Data characterBinary rep
37、resentation 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 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 ri
38、ght; 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 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.
39、 The following algorithm defines the rules to convert numeric data into the symbol characters of an Interleaved 2 of 5 symbol: Step in Algorithm 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
40、 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) Encode 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 pa
41、ir 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 taking 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,
42、 followed by the first space of the pattern for the second digit. Binary pattern 0101101000 Figure 1 illustrates the sequence of bar and space elements corresponding to the data character pairs “03 67“. Copyright International Organization for Standardization Provided by IHS under license with ISO L
43、icensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 16390:2007(E) 4 ISO/IEC 2007 All rights reserved 06 NEXT CHAR. 37 Figure 1 Interleaved 2 of 5 character pairs, encoding “03 67“ 4
44、.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 data symbol character
45、s 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 patterns and they
46、 shall not be transmitted by the decoder. Figure 2 illustrates the start and stop patterns and their relationship to the symbol data characters. Quiet zoneFirst char.Last char.Quiet zone STARTSTOP Figure 2 Start and stop patterns Copyright International Organization for Standardization Provided by I
47、HS under license with ISO Licensee=IHS Employees/1111111001, User=DAWSON, DAVIS Not for Resale, 07/03/2007 02:43:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 16390:2007(E) ISO/IEC 2007 All rights reserved 5 Figure 3 illustrates a complete Interleaved 2 of 5 ba
48、r code symbol for the data “1234“ showing the necessary quiet zones. Quiet zoneStart1st character pair2nd character pairStopQuiet zone 1234 Figure 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 Dimensions Interleaved 2 of 5 symbols shall use the following nominal d