BS ISO IEC 8859-4-1998 Information technology - 8-bit single-byte coded graphic character sets - Latin alphabet No 4《信息技术 8-位单字节编码图形字符集 4号拉丁字母》.pdf

《BS ISO IEC 8859-4-1998 Information technology - 8-bit single-byte coded graphic character sets - Latin alphabet No 4《信息技术 8-位单字节编码图形字符集 4号拉丁字母》.pdf》由会员分享，可在线阅读，更多相关《BS ISO IEC 8859-4-1998 Information technology - 8-bit single-byte coded graphic character sets - Latin alphabet No 4《信息技术 8-位单字节编码图形字符集 4号拉丁字母》.pdf（18页珍藏版）》请在麦多课文档分享上搜索。

1、BRITISH STANDARD BS ISO/IEC 8859-4:1998 Information technology 8-bit single-byte coded graphic character sets Part 4: Latin alphabet No. 4 ICS 35.040BSISO/IEC 8859-4:1998 This British Standard, having been prepared under the directionof the DISC Board, waspublished under the authorityof the Standard

2、s Boardand comes into effect on 15 August 1998 BSI 04-1999 ISBN 0 580 29207 X National foreword This British Standard reproduces verbatim ISO/IEC 8859-4:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee IST/2, Character S

3、ets and Information Coding, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European

4、developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards

5、Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for th

6、eir correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO/IEC title page, pages ii to iv, pages 1 to 9 and a back cover. This standard ha

7、s been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO/IEC8859-4:1998 BSI 04-1999 i Contents Page National foreword Inside front cover Forew

8、ord iii Text of ISO/IEC 8859-4 1ii blankBSISO/IEC 8859-4:1998 ii BSI 04-1999 Contents Page Foreword iii Introduction 1 1 Scope 1 2 Conformance 1 3 Normative references 1 4 Definitions 2 5 Notation, code table and names 2 6 Specification of the coded character set 3 7 Identification of the character

9、set 6 Annex A (informative) Coverage of languages by parts 1 to 10 of ISO/IEC 8859 8 Annex B (informative) Main differences between ISO 8859-4:1988 and this first edition of this part of ISO/IEC 8859 8 Annex C (informative) Bibliography 9 Table 1 Character set, coded representation 3 Table 2 Code ta

10、ble of Latin alphabet No. 4 7 Table A.1 Language coverage 9 Descriptors: Data processing, text processing, information interchange, data transmission, datacodes, ISO eight-bit code, coded character sets, Latin characters.BSISO/IEC 8859-4:1998 BSI 04-1999 iii Foreword ISO (the International Organizat

11、ion 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 committees established by the respect

12、ive 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 nongovernmental, in liaison with ISO and IEC, also take part in the work. In the field of information

13、technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC1. 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 least75% of the national bodies ca

14、sting a vote. International Standard ISO/IEC 8859-4 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 2, Character sets and information coding. This edition cancels and replaces ISO 8859-4:1988 which has been technically revised. ISO/IEC 8859 consists o

15、f the following parts, under the general title Information technology 8-bit single-byte coded graphic character sets: Part 1: Latin alphabet No. 1; Part 2: Latin alphabet No. 2; Part 3: Latin alphabet No. 3; Part 4: Latin alphabet No. 4; Part 5: Latin/Cyrillic alphabet; Part 6: Latin/Arabic alphabet

16、; Part 7: Latin/Greek alphabet; Part 8: Latin/Hebrew alphabet; Part 9: Latin alphabet No. 5; Part 10: Latin alphabet No. 6. Annex A to Annex C of this part of ISO/IEC 8859 are for information only.iv blankBSISO/IEC8859-4:1998 BSI 04-1999 1 Introduction ISO/IEC 8859 consists of several parts. Each pa

17、rt specifies a set of up to 191 graphic characters and the coded representation of these characters by means of a single 8-bit byte. Each set is intended for use for a particular group of languages. 1 Scope This part of ISO/IEC 8859 specifies a set of191 coded graphic characters identified as Latin

18、alphabet No. 4. This set of coded graphic characters is intended for use in data and text processing applications and also for information interchange. The set contains graphic characters used for general purpose applications in typical office environments in at least the following languages: Danish

19、, English, Estonian, Finnish, German, Greenlandic, Latin, Latvian, Lithuanian, Norwegian, Smi (but see Annex A.1, Notes), Slovene and Swedish. This set of coded graphic characters may be regarded as a version of an 8-bit code according to ISO/IEC 2022 or ISO/IEC 4873 at level 1. This part of ISO/IEC

20、 8859 may not be used in conjunction with any other parts of ISO/IEC 8859. If coded characters from more than one part are to be used together, by means of code extension techniques, the equivalent coded character sets from ISO/IEC 10367 should be used instead within a version of ISO/IEC 4873 at lev

21、el 2 or level 3. The coded characters in this set may be used in conjunction with coded control functions selected from ISO/IEC 6429. However, control functions are not used to create composite graphic symbols from two or more graphic characters (see clause6). NOTEISO/IEC 8859 is not intended for us

22、e with Telematic services defined by ITU-T. If information coded according to ISO/IEC 8859 is to be transferred to such services, it will have to conform to the requirements of those services at the access-point. 2 Conformance 2.1 Conformance of information interchange A coded-character-data-element

23、 (CC-data-element) within coded information for interchange is in conformance with this part of ISO/IEC 8859 if all the coded representations of graphic characters within that CC-data-element conform to the requirements of clause6. 2.2 Conformance of devices A device is in conformance with this part

24、 of ISO/IEC8859 if it conforms to the requirements of2.2.1, and either or both of 2.2.2 and2.2.3. A claim of conformance shall identify the document which contains the description specified in2.2.1. 2.2.1 Device description A device that conforms to this part of ISO/IEC 8859 shall be the subject of

25、a description that identifies the means by which the user may supply characters to the device, or may recognize them when they are made available to him, as specified respectively in2.2.2 and2.2.3. 2.2.2 Originating devices An originating device shall allow its user to supply any sequence of charact

26、ers from those specified in clause6, and shall be capable of transmitting their coded representations within a CC-data-element. 2.2.3 Receiving devices A receiving device shall be capable of receiving and interpreting any coded representations of characters that are within a CC-data-element, and tha

27、t conform to clause6, and shall make the corresponding characters available to its user in such a way that the user can identify them from among those specified there, and can distinguish them from each other. 3 Normative references The following standards contain provisions which, through reference

28、 in this text, constitute provisions of this part of ISO/IEC 8859. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO/IEC8859 are encouraged to investigate the possibility of applying the most rece

29、nt editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO/IEC 2022:1994, Information technology Character code structure and extension techniques. ISO/IEC 4873:1991, Information technology ISO8-bit code for information int

30、erchange Structure and rules for implementation. ISO/IEC 8824-1:1995, Information technology Abstract Syntax Notation One (ASN.1):Specification of basic notation. BSISO/IEC 8859-4:1998 2 BSI 04-1999 4 Definitions For the purposes of this part of ISO/IEC 8859 the following definitions apply: 4.1 bit

31、combination an ordered set of bits used for the representation of characters 4.2 byte a bit string that is operated upon as a unit 4.3 character a member of a set of elements used for the organization, control, or representation of data 4.4 code table a table showing the characters allocated to each

32、 bit combination in a code 4.5 coded character set; code a set of unambiguous rules that establishes a character set and the one-to-one relationship between the characters of the set and their bit combinations 4.6 coded-character-data-element (CC-data-element) an element of interchanged information

33、that is specified to consist of a sequence of coded representations of characters, in accordance with one or more identified standards for coded character sets 4.7 graphic character a character, other than a control function, that has a visual representation normally handwritten, printed or displaye

34、d, and that has a coded representation consisting of one or more bit combinations NOTEIn ISO/IEC 8859 a single bit combination is used to represent each character. 4.8 graphic symbol a visual representation of a graphic character or of a control function 4.9 position that part of a code table identi

35、fied by its column and row coordinates 5 Notation, code table and names 5.1 Notation The bits of the bit combinations of the 8-bit code are identified by b 8 , b 7 , b 6 , b 5 , b 4 , b 3 , b 2 , and b 1 , where b 8is the highest-order, or most-significant bit and b 1is the lowest-order, or least-si

36、gnificant bit. The bit combinations may be interpreted to represent numbers in binary notation by attributing the following weights to the individual bits: Using these weights, the bit combinations are identified by notations of the form xx/yy, where xx and yy are numbers in the range00 to 15. The c

37、orrespondence between the notations of the form xx/yy and the bit combinations consisting of the bits b 8to b 1is as follows: xx is the number represented by b 8 , b 7 , b 6and b 5where these bits are given the weights 8, 4, 2, and 1 respectively. yy is the number represented by b 4 , b 3 , b 2and b

38、 1where these bits are given the weights 8, 4, 2, and 1 respectively. The bit combinations are also identified by notations of the form hk, where h and k are numbers in the range0 to F in hexadecimal notation. The number h is the same as the number xx described above, and the number k the same as th

39、e number yy described above. 5.2 Layout of the code table An 8-bit code table consists of 256 positions arranged in16 columns and 16 rows. The columns and the rows are numbered 00 to 15. In hexadecimal notation the columns and the rows are numbered0 to F. The code table positions are identified by n

40、otations of the form xx/yy, where xx is the column number and yy is the row number. The column and row numbers are shown at the top and left edges of the table respectively. The code table positions are also identified by notations of the form hk, where h is the column number and k is the row number

41、 in hexadecimal notation. The column and row numbers are shown at the bottom and right edges of the table respectively. The positions of the code table are in one-to-one correspondence with the bit combinations of the code. The notation of a code table position, of the form xx/yy, or of the form hk,

42、 is the same as that of the corresponding bit combination. Bit b 8 b 7 b 6 b 5 b 4 b 3 b 2 b 1 Weight 128 64 32 16 8 4 2 1BSISO/IEC8859-4:1998 BSI 04-1999 3 5.3 Names and meanings This part of ISO/IEC 8859 assigns a unique name and a unique identifier to each graphic character. These names and ident

43、ifiers have been taken from ISO/IEC10646-1 (E). This part of ISO/IEC 8859 also specifies an acronym for each of the characters SPACE, NO-BREAK SPACE and SOFT HYPHEN. For acronyms only Latin capital letters A to Z are used. It is intended that the acronyms be retained in all translations of the text.

44、 Except for SPACE (SP), NO-BREAK SPACE (NBSP) and SOFT HYPHEN (SHY), this part of ISO/IEC 8859 does not define and does not restrict the meanings of graphic characters. This part of ISO/IEC 8859 specifies a graphic symbol for each graphic character. This symbol is shown in the corresponding position

45、 of the code table. However, this part, or any other part, of ISO/IEC8859 does not specify a particular style or font design for imaging graphic characters. Annex B of ISO/IEC 10367 gives further information on this subject. 5.3.1 SPACE (SP) A graphic character the visual representation of which con

46、sists of the absence of a graphic symbol. 5.3.2 NO-BREAK SPACE (NBSP) A graphic character the visual representation of which consists of the absence of a graphic symbol, for use when a line break is to be prevented in the text as presented. 5.3.3 SOFT HYPHEN (SHY) A graphic character that is imaged

47、by a graphic symbol identical with, or similar to, that representing HYPHEN, for use when a line break has been established within a word. 6 Specification of the coded character set This part of ISO/IEC 8859 specifies191 characters allocated to the bit combinations of the code table (Table 2). None

48、of these characters are combining characters. NOTECombining characters are described in ISO/IEC2022:1994 subclause6.3.3. Control functions, such as BACKSPACE or CARRIAGE RETURN, shall not be used to create composite graphic symbols, which are made up from the graphic representations of two or more c

49、haracters. 6.1 Characters of the set and their coded representation SeeTable 1. Table 1 Character set, coded representation Bit combination Hex Identifier Name 02/00 02/01 02/02 02/03 02/04 02/05 02/06 02/07 02/08 02/09 02/10 02/11 02/12 02/13 02/14 02/15 03/00 03/01 03/02 03/03 03/04 03/05 03/06 03/07 03/08 03/09 03/10 03/11 03/12 03/13 03/14 03/15 04/00 04/01 04/02 04/03 04/04 04/05 04/06 04/07 04/08 04/09 04/10 04/11 04/12 04/13 04/14 04/15 05/00 05/01 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38