1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 841 : 1996 The European
2、 Standard EN 841 : 1995 has the status of a British Standard ICS 35.040 N No o c co op py yi in ng g w wi it th ho ou ut t B BS SI I p pe er rm mi is ss si io on n e ex xc ce ep pt t a as s p pe er rm mi it tt te ed d b by y C Co op py yr ri ig gh ht t L La aw w Bar coding Symbology specifications F
3、ormat descriptionThis British Standard, having been prepared under the direction of the Information Systems Technology Assembly, was published under the authority of the Standards Board and comes into effect on 15 May 1996 BSI 1996 The following BSI references relate to the work on this standard: Co
4、mmittee reference IST/34 Draft for comment 92/66846 DC ISBN 0 580 25387 2 BS EN 841 : 1996 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee IST/34, Bar coding
5、, upon which the following bodies were represented: Article Number Association (UK) Ltd. Association of British Health-care Industries Association of the British Pharmaceutical Industry Auto ID User Association Automatic Identification Manufacturers Association (Aim UK) Brewers Society British Iron
6、and Steel Producers Association British Office Systems and Stationery Federation CCTA (the Government Centre for Information Systems) Engineering Employers Federation Flexible Packaging Association Food and Drink Federation Kings Town Photocodes Ltd. Kodak Limited Ministry of Defence National Associ
7、ation of Paper Merchants Process and Packaging Machinery Association Society of Motor Manufacturers and Traders Limited BSI 1996 i BS EN 841 : 1996 Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 841 3ii BSI 1996 BS EN 841 : 1996 National foreword T
8、his British Standard has been prepared by Technical Committee IST/34 and is the English language version of EN 841 : 1995, Bar coding Symbology specifications Format description, published by the European Committee for Standardization. This British Standard is published under the direction of the In
9、formation Systems Technology Assembly whose Technical Committee IST/34 has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on interpretation, or proposals for change, and keep UK interest informed; monitor related
10、 international and European developments and promulgate them in the UK. NOTE. International and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London, W4 4AL. Compliance with a British Standard does not of itself confer immunity
11、from legal obligations.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1995 All rights of reproduction and communication in any form and by any means reserved in all countries to
12、CEN and its members Ref. No. EN 841 : 1995 E EUROPEAN STANDARD EN 841 NORME EUROPE ENNE EUROPA ISCHE NORM August 1995 ICS 35.040 Descriptors: data processing, character recognition, optical recognition, graphic characters, alphanumeric character sets, bar codes, symbols, characteristics, dimensions
13、English version Bar coding Symbology specifications Format description Code a barres Spe cifications des symbologies Description des formats Strichcodierung Symbologiespezifikationen Beschreibung von Formaten This European Standard was approved by CEN on 1995-06-22. CEN members are bound to comply w
14、ith the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secreta
15、riat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officia
16、l versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 841 : 1995 BSI 1996 Foreword This European Standard ha
17、s been prepared by the Technical Committee CEN/TC 225, Bar coding, of which the secretariat is held by NNI. Organizations contributing to the development of the standard include: AIM Europe (Automatic Identification Manufacturers); NOTE. Not all of the symbologies which appear in this document are d
18、efined in European Standards; for information on current European Standards contact the CEN Central Secretariat or national standards organizations. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by
19、 February 1996, and conflicting national standards shall be withdrawn at the latest by February 1996. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Irelan
20、d, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Definitions 3 4 Requirements 3 4.1 Symbology characteristics 3 4.2 Symbol structure 3 4.3 Character encodation 3 4.4 Di
21、mensions and tolerances 3 4.5 Reference decode algorithm 3 4.6 Application-defined parameters 3Page 3 EN 841 : 1995 BSI 1996 Introduction The technology of bar coding is based on the recognition of patterns encoded in bars and spaces of defined dimensions. There is a number of methods of encoding in
22、formation in bar code form, known as symbologies, and the rules defining the translation of characters into bar and space patterns and other essential features are known as the symbology specification. Previously symbology specifications have been developed and published by a number of organizations
23、 resulting in certain instances in conflicting requirements for certain symbologies. Manufacturers of bar code equipment and users of bar code technology require standard symbology specifications to which they can refer when developing equipment and application standards. In order to provide a commo
24、n framework for symbology specifications and to allow for future development it is therefore desirable to standardize the format for these. 1 Scope This standard specifies the format for bar code symbology specifications; specifies the characteristics of the symbology which need to be defined. The s
25、tandard is applicable as the basis for European Standards for bar code symbologies. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publica
26、tions are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. prEN 1556 Bar
27、coding Terminology EN 796 Bar coding Symbology identifiers 3 Definitions For the purposes of this standard the definitions in prEN 1556 apply. 4 Requirements A European Standard specification for a bar code symbology shall define the following details: 4.1 Symbology characteristics A description of
28、the general characteristics of the symbology, which shall include: a) the encodable character set; b) the classes into which the symbology falls, including an indication of whether it is a single row or multi-row symbology, discrete or continuous, fixed or variable length; c) whether a symbol check
29、character is mandatory or optional; d) whether character self checking is inherent. The description may also include: e) minimum nominal element dimension; f) range of permissible data character densities; g) summary of optional additional features; h) expression of non-data overhead; i) other chara
30、cteristics which need to be identified in order to describe the symbology adequately; j) details of any restrictions as to the use of the symbology for specified applications. 4.2 Symbol structure In this clause the overall structure of a symbol shall be described. 4.3 Character encodation The princ
31、iples of the encodation of characters shall be set out together with a table showing the bar and space pattern for each character in the encodable character set. This description shall also cover any specially coded characters such as start and stop characters, check characters (optional or mandator
32、y) including the formula or algorithm for their calculation and verification, quiet zones and the data to be transmitted by a decoder. 4.4 Dimensions and tolerances In this clause the dimensions of elements and other features of symbols shall be defined. A formula which can be used to calculate the
33、overall symbol length shall be given. The dimensional tolerances, both for printed symbols and for film masters, shall be indicated, either as a function of a specific dimension of the symbol or as an absolute measurement. 4.5 Reference decode algorithm The specified printing tolerances for any symb
34、ology are based on a defined decode algorithm. The standard shall define the algorithm used for the derivation of the tolerances. The algorithm shall not be mandatory for use in decoding equipment. 4.6 Application-defined parameters The standard shall specify which of the symbology characteristics (
35、see 4.1) shall have parameters defined by the application standard. NOTE. To facilitate comprehension of the standard, informative and normative annexes may be incorporated covering additional aspects of the symbology such as, for example, human readable interpretations of the encoded information, o
36、ptional features, rules for optimization of overall symbol size, and the symbology identifier (see EN 796).BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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