1、December 2009DEUTSCHE NORM English price group 18No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 35.040!$“1562701www.d
2、in.deDDIN ISO/IEC 6937Information technology Coded graphic character set for text communication Latin alphabet (ISO/IEC 6937:2001)English version of DIN ISO/IEC 6937:2009-12Informationstechnik Zeichenstze fr die Textkommunikation Lateinisches Alphabet (ISO/IEC 6937:2001)Englische Fassung DIN ISO/IEC
3、 6937:2009-12SupersedesDIN ISO/IEC 6937:1996-11www.beuth.deDocument comprises 44 pagesDIN ISO/IEC 6937:2009-12 2 Contents Page National foreword .3 National Annex NA (informative) Bibliography 3 Introduction.4 1 Scope 5 2 Conformance and implementation 5 2.1 Conformance5 2.2 Implementation 6 3 Norma
4、tive references 6 4 Terms and definitions .7 5 Notation, code table and names 9 5.1 Notation 9 5.2 Code table.9 5.3 Names .9 6 Specifications of SPACE, NO-BREAK SPACE and SOFT HYPHEN 10 7 Composition of the character repertoire 10 8 Specification of the coded character set . 10 8.1 Character sets. 1
5、0 8.2 Explanations concerning the code table 11 8.3 Coded representations of the graphic characters of the repertoire . 11 9 Graphic character subrepertoires. 12 10 Identification of options. 13 10.1 Purpose and context of identification 13 10.2 Identification of coding method 13 10.3 Identification
6、 of primary and supplementary sets 13 10.4 Identification of subrepertoire. 13 Annex A (normative) 7-bit code 24 Annex B (informative) Method of definition of short identifiers of this International Standard 27 Annex C (informative) Use of non-spacing diacritical marks 37 Annex D (informative) Use o
7、f Latin alphabetic characters in various languages . 38 Annex E (informative) Alternative coded representation of the repertoire with no non-spacing diacritical marks . 42 Annex F (informative) Main differences between the 1994 (second) edition of ISO/IEC 6937 and the present (third) edition of this
8、 International Standard. 43 Bibliography. 44 DIN ISO/IEC 6937:2009-12 3 National foreword This standard has been prepared by Joint Technical Committee ISO/IEC JTC 1 “Information technology”, The responsible German body involved in its preparation was the Normenausschuss Informationstechnik und Anwen
9、dungen (Information Technology and selected IT Applications Standards Committee), Working Group Codierte Zeichenstze. This third edition cancels and replaces the second edition (ISO/IEC 6937:1994), which has been technically revised. Annex A forms a normative part of this International Standard. Ann
10、exes B, C, D, E and F are for information only. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO/IEC 2022 DIN ISO/IEC 2022 The International Standard ISO/IEC 10646-1:2000 referred to in this document has been replaced with ISO/IEC 10646:200
11、3-12. Amendments This standard differs from DIN ISO/IEC 6937:1996-11 as follows: a) ISO/IEC 6937:2001 has been adopted without any modifications. b) The names “LATIN SMALL LIGATURE AE” and “LATIN CAPITAL LIGATURE AE” have been replaced with “LATIN SMALL LETTER AE” and “LATIN CAPITAL LETTER AE” to be
12、 in line with ISO/IEC 10646-1. c) The names “NOTE” and “TRADEMARKSIGN” have been replaced with “EIGHTH NOTE” and “TRADE MARK SIGN” to be in line with ISO/IEC 10646-1. d) A number of short identifiers have been modified, see Annex B, NOTE 2. e) Some corrections and clarifications have been made. Prev
13、ious editions DIN ISO/IEC 6937: 1996-11 National Annex NA (informative) Bibliography DIN 2137-2, Text and office systems Keyboards Part 2: German keyboard for data and text processing Key arrangement and allocation of graphic characters to keys DIN 66303, Information technology 8 bit code DIN ISO/IE
14、C 2022, Information technology Character code structure and extension techniques Subcommittee SC 2 “Coded character sets”. Introduction This International Standard specifies a repertoire of graphic characters and their coded representations, for usein text communication.Although, in general, text (s
15、ee 4.16) consists of characters and pictures, this International Standard applies onlyto text made up of characters.The specifications are based on 8-bit coding; Annex A specifies the 7-bit code for the character set of thisInternational Standard.Other annexes include:a) a description of the method
16、used to define a short identifier for each character specified in this InternationalStandard (Annex B);b) a summary of the use of non-spacing diacritical marks in combination with letters of the basic Latin alphabeticcharacters (Annex C);c) a summary of the use of Latin alphabetic characters in vari
17、ous languages (Annex D);d) an alternative coded representation of the repertoire with no non-spacing diacritical marks (Annex E);e) a summary of differences between the 1994 (second) edition of ISO/IEC 6937, and the present (third) editionof this International Standard (Annex F);f) a bibliography.In
18、formation technology Coded graphic character set for text communication Latin alphabet 4 DIN ISO/IEC 6937:2009-12 1 Scope This International Standarda) specifies the coded representation of the characters;b) specifies a repertoire of the Latin alphabetic and non-alphabetic characters for the communi
19、cation of text inmany European languages using the Latin script;c) specifies rules for the definitions and use of graphic character subrepertoires, i.e. subsets of the specifiedcharacter repertoire.2 Conformance and implementation2.1 Conformance2.1.1 Conformance of information interchangeA coded-cha
20、racter-data-element (CC-data-element) within coded information for interchange is in conformance withthis International Standard if all coded representations of characters within that CC-data-element conform to themandatory requirements of this International Standard.A claim of conformance shall ide
21、ntify:- the subrepertoire in accordance with clause 9, if one has been adopted,- the 7-bit coding in accordance with Annex A, if it has been adopted.2.1.2 Conformance of devicesA device is in conformance with this International Standard if it conforms to the requirements of 2.1.2.1 and eitheror both
22、 2.1.2.2 and 2.1.2.3 below. 2.1.2.1 Device descriptionA device that conforms to this International Standard shall be the subject of a description that identifies the meansby which the user may supply characters to the device, or may recognize them when they are made available tothe user, as specifie
23、d respectively in 2.1.2.2 and 2.1.2.3 below.2.1.2.2 Originating devicesAn originating device shall allow its user to supply any sequence of characters of the character repertoire, and shallbe capable of transmitting their coded representations within a CC-data-element.2.1.2.3 Receiving devices A rec
24、eiving device shall be capable of receiving and interpreting any coded representation of characters that arewithin a CC-data-element, and that conform to 2.1.1 of this International Standard, and shall make thecorresponding characters available to its user in such a way that the user can identify th
25、em among those of therepertoire, and can distinguish them from each other.5 DIN ISO/IEC 6937:2009-12 2.2 ImplementationThe use of this character set requires definitions of its implementation in various media. For example, these couldinclude magnetic and optical interchangeable media and transmissio
26、n channels, thus permitting interchange of datato take place either indirectly by means of an intermediate recording on a physical medium, or by local connectionof various units (such as input and output devices and computers) or by means of data transmission equipment.The implementation of this cod
27、ed character set in physical media and for transmission, taking into account the needfor error checking, may be the subject of other International Standards.3 Normative referencesISO/IEC 2022:1994, Information technology - Character code structure and extension techniquesISO 2375:1985, Data processi
28、ng - Procedure for registration of escape sequencesISO/IEC 7350:1991, Information technology - Registration of repertoires of graphic characters from ISO/IEC 10367ISO/IEC 10367:1991, Information technology - Standardized coded graphic character sets for use in 8-bitcodesISO/IEC 10538:1991, Informati
29、on technology - Control functions for text communicationISO/IEC 10646-1:2000, Information technology - Universal Multiple-Octet Coded Character Set (UCS) - Part 1:Architecture and Basic Multilingual PlaneThe following normative documents contain provisions which, through reference in this text, cons
30、titute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edi
31、tions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. 6 DIN ISO/IEC 6937:2009-12 4 Terms and definitionsFor the purposes of this
32、 International Standard, the following terms and definitions apply:4.1active positionthe character position which is to image the graphic symbol representing the next graphic character or relativeto which the next control function is to be executed4.2bit combinationan ordered set of bits used for th
33、e representation of characters4.3charactera member of a set of elements used for the organization, control or representation of data4.4character positionthe portion of a display that is imaging or is capable of imaging a graphic symbol4.5coded-character-data-element (CC-data-element)an element of in
34、terchanged information that is specified to consist of a sequence of coded representations ofcharacters, in accordance with one or more identified standards for coded character setsNOTE 1: In a communication environment in accordance with the Reference Model for Open Systems Interconnection of ISO 7
35、498, aCC-data-element will form all or part of the information that corresponds to the Presentation-Protocol-Data-Unit (PPDU) defined in thatInternational Standard.NOTE 2: When information interchange is accomplished by means of interchangeable media, a CC-data-element will form all or part of thein
36、formation that corresponds to the user data, and not that recorded during formatting and initialization.4.6coded character set; codea set of unambiguous rules that establishes a character set and the one-to-one relationship between the charactersof the set and their bit combinations4.7code extension
37、the techniques for the encoding of characters that are not included in the character set of a given code4.8code tablea table showing the characters allocated to each bit combination in a code4.9control charactera control function the coded representation of which consists of a single bit combination
38、4.10control functionan element of a character set that affects the recording, processing, transmission or interpretation of data, and thathas a coded representation consisting of one or more bit combinations7 DIN ISO/IEC 6937:2009-12 4.11 device: A component of information processing equipment which
39、 can transmit, and/or receive, codedinformation within CC-data-elementsNOTE: It may be an input/output device in the conventional sense, or a process such as an application program or gateway function.4.12escape sequencea string of bit combinations that are used for control purposes in code extensio
40、n procedures. The first of these bitcombinations represents the control function ESCAPENOTE: Formats and rules regarding the use of escape sequences are specified in ISO/IEC 2022.4.13graphic charactera character, other than a control function, that has a visual representation normally handwritten, p
41、rinted ordisplayed, and that has a coded representation consisting of one or more bit combinations4.14graphic symbola visual representation of a graphic character or of a control function4.15repertoirea specified set of characters that are represented by one or more bit combinations of a coded chara
42、cter set4.16texta representation of information for human comprehension that is intended for presentation in a two-dimensionalform, for example printed on paper or displayed on a screen.Text consists of symbols, phrases or sentences in natural or artificial languages, pictures, diagrams and tablesNO
43、TE: This International Standard applies only to text made up of characters.4.17text communication; communication of textthe transfer of text by means of telecommunicationsNOTE: In the context of this International Standard, text communication is by means of binary-coded representations of characters
44、.4.18usera person or other entity that invokes the services provided by a deviceNOTE 1: This entity may be a process such as an application program if the “device“ is a code convertor or a gateway function, for example.NOTE 2: The characters, as supplied by the user or made available to the user, ma
45、y be in the form of codes local to the device, or ofnon-conventional visible representations, provided that 2.1.2 above is satisfied.8 DIN ISO/IEC 6937:2009-12 5 Notation, code table and names5.1 NotationThe bits of the bit combinations of the 8-bit code are identified by b , b , b , b , b , b , b a
46、nd b , where b is8 7 6 5 4 3 2 1 8the highest-order, or most significant bit and b is the lowest-order, or least significant bit.1The bit combinations may be interpreted to represent numbers in the range 0 to 255 in binary notation by attributingthe following weights to the individual bits:Bit b b b
47、 b b b b b8 7 6 5 4 3 2 1Weight 128 64 32 16 8 4 2 1In this International Standard, the bit combinations are identified by notations of the form xx/yy, where xx and yyare numbers in the range 00 to 15. The correspondence between the notations of the form xx/yy and the bitcombinations consisting of t
48、he bits b to b , is as follows:8 1- xx is the number represented by b , b , b and b where these bits are given the weights 8, 4, 2 and 1,8 7 6 5respectively;- yy is the number represented by b , b , b and b where these bits are given the weights 8, 4, 2 and 1,4 3 2 1respectively.The notations of the
49、 form xx/yy are the same as the ones used to identify code table positions, where xx is thecolumn number and yy is the row number (see 5.2).5.2 Code tableAn 8-bit code table consists of 256 positions arranged in 16 columns and 16 rows. The columns and rows arenumbered 00 to 15.The code table positions are identified by notations of the form xx/yy, where xx is the column number and yy is therow number.The positions of the code table are in one-to-one correspondence with the bit combinations of the code. Thenotation of a code table position, of the fo
