1、CEN ENS841 95 W 3404589 01255b8 b50 BRITISH STANDARD Bar coding - Symbology specifications - Format description The European Standard EN 841 : 1995 has the status of a British Standard ICs 35.040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 841 : 1996 CEN ENx843 75 m
2、3g04587 0325567 597 m BS EN 841 : 1996 This British Standard, having been prepared under the direction of the infomation Systems Technology Assembly, was published under the authority of the Sandards Board and comes into effect on 15 May 1996 O BSI 1996 Committees responsible for this British Standa
3、rd The preparation of this British Standard was entrusted to Technical Committee IST/34, Bar coding, upon which the following bodies were represented: Article Number Association (UK) Ltd. Association of British Healthcare Industries Association of the British Pharmaceutical Industry Auto ID User Ass
4、ociation Automatic Identification Manacturem Association (Aim VK) Brewers Society British Iron and Steel Producers Association British fce Systems and Stationery Federation CCTA (the Government Centre for information Systems) Engineering Employers Federation Flexible Packaging Association Food and D
5、rink Federation Kings Town Photocodes Ltd. Kodak Limited Ministry of Defence National Association of Paper Merchants Process and Packaging Machinery Association Society of Motor Manufacturers and Raders Limited Amendments issued since publication ID - present to the responsible internationalEuropean
6、 committee any enquires on interpretation, or proposals for change, and keep UK interest informed; - monitor related 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,
7、BSI, 389 Chiswick High Road, London, W4 4AL. Compliance with a British Standard does not of itself confer immunity from legal obligations. ii Q BSI 1996 - CEN EN+84L 95 = 3404589 0325572 083 EUROPEAN STANDARD EN 841 NORME EUROPENNE EuRopAILscHE NORM August 1995 ICs 35.040 Descriptors: data processin
8、g, character recognition, optical recognition, graphic characters, alphanumeric character sets, bar codes, symbols, characteristics, dimensions English version Bar codmg - Symbology specfications - Format description Code a barres - Spcifcations des symbologies - Description des formats Strichcodier
9、ung - Symbologie onen - Beschreibung von Formaten This European Standard was approved by CEN on 1995-0622. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterati
10、on. Up-to-date lists and bibliographicai references concerning such national standards may be obtained on application to the Centrai Secretariat or to any CEN member. This European Standard exids in three official versions (English, French, Gem). A version in any other hguage made by translation und
11、er the responsibility of a CEN member into its own language and notified to the Centrai Secretariat has the same status as the officiai versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Fnhd, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherland
12、s, Norwax Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Centrai Secretariat: rue de Stassart 36, B-1050 Brussels O 1995 AU rights of reproduction and communication in any form and by any m
13、eans reserved in aii countries to CEN and its members Ref. No. EN 841 : 1995 E - - CEN ENM843 95 = 3404589 O325573 TL8 Page 2 EN 841 : 1995 Foreword This European Standard has been prepared by the Technical Committee CENITC 225, Bar coding, of which the secretariat is held by “I. Organizations contr
14、ibuting to the development of the standard include: - AIM Europe (Automatic Identification Manufacturers); NOTE. Not all of the symbologies which appear in this document are deked in European Standardq for infodon on current European Standards contact the CEN Central Secretariat or national standard
15、s 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 Februaqy 1996, and conflicting national standards shall be withdrawn at the latest by February 1996. Accordmg to the CENKENELEC Int
16、ernal Regulations, the following countries are bound to implement this European Standard Austria, Belgium, Denmark, Finiand, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwax Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Foreword Introduction 1
17、 2 3 4 4.1 4.2 4.3 4.4 4.5 4.6 Scope Normative references Denitions Requirements Symbology characteristics Symbol structure Character encodation Dimensions and tolerances Reference decode algorithm Applicationdefined parameters page 2 3 3 3 3 3 3 3 3 3 3 3 O BSI 1996 CEN EN1841 95 3404589 0325574 95
18、4 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 information in bar code form, known as symbologies, and the rules defining the translation of characters into bar and space p
19、atterns and other essential features are known as the symbology specification. Previously symbology specifications have been developed and published by a number of organizations resulting in certain instances in conflicting requirements for certain symbologies. Manufacturers of bar code equipment an
20、d users of bar code technology require standard symbology specications to which they can refer when developing equipment and application standards. In order to provide a common framework for symbology specifications and to allow for future development it is therefore desirable to standardize the for
21、mat for these. 1 scope This StanM - specifies the format for bar code symbology specifications; - specifies the characteristics of the symbology which need to be defined. The standard is applicable as the basis for European Standards for bar code symbologies. 2 Normative references This European Sta
22、ndard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply t
23、o 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 coding - Terminology EN 796 Bar coding - Symbology identifiers 3 Definitions For the purposes of this standard the definitio
24、ns in prEN 1556 apply. 4 Requirements A European Standard specification for a bar code symbology shall define the following details: Page 3 EN 841 : 1995 4.1 Symbology characteristics A description of the general characteristics of the symbology, which shall include: a) the encodable character set;
25、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; e) whether a symbol check character is mandatory or optional, d) whether character self checking is inherent. The description
26、 may also include: e) minimum nominal element dimension; f) range of permissible data character densities; g) summary of optional additional features; h) expression of nondata overhead; i) other characteristics which need to be identified in order to describe the symbology adequately; j) details of
27、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 principles of the encodation of characters shall be set out together with a table showing the bar and spa
28、ce 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 mandatory) including the formula or algorithm for their calculation and verification, quiet zones and the da
29、ta to be transmitted by a decoder. 4.4 Dimensions and tolerances In this clause the dimensions of elements and other features of symbols sha be defined. A formula which can be used to calculate the overall symbol length shall be given. The dimensional tolerances, both for printed symbols and for fm
30、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 symbology are based on a defined decode algorithm. The standard shall define the algorithm used for the deri
31、vation of the tolerances. The algorithm shall not be mandatory for use in decoding equipment. 4.6. Application-defined parameters The standard shall spec which of the symbology characteristics (see 4.1) shall have parameters defined by the application standard. NOTE. To facilitate comprehension of t
32、he 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, Optional features, rules for optimization of overall symbol size, and the symbology identier (see EN 796).
33、O BSI 1996 BS EN 841 : 1996 BSI 389 Chiswick High Road London w4 4AL CEN EN*4L 95 m 340Y589 0325575 890 m BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international leve
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