BS ISO IEC 8859-8-1999 Information technology - 8-bit single-byte coded graphic character sets - Latin Hebrew alphabet《信息技术 8位单字节编码图形字符集 拉丁 希伯来语字母》.pdf

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1、BRITISH STANDARD BS ISO/IEC 8859-8:1999 Information technology 8-bit single-byte coded graphic character sets Part8: Latin/Hebrew alphabet ICS 35.040BSISO/IEC8859-8:1999 This BritishStandard, having been prepared under the directionof the Disc Board, waspublished under the authorityof the Standards

2、Committee and comes into effect on 15April1999 BSI 03-2000 ISBN 0 580 32411 7 National foreword This BritishStandard reproduces verbatim ISO/IEC8859-8:1999 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee IST/2, Character set

3、s 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 de

4、velopments 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 BritishStandards which implement international or European publications referred to in this document may be found in the BSI Standards Cat

5、alogue 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 their

6、 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, pagesi andii, theISO/IEC title page, pagesii toiv, pages1 to9 and a back cover. This standard has been up

7、dated (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/IEC8859-8:1999 BSI 03-2000 i Contents Page National foreword Inside front cover Foreword iii T

8、ext of ISO/IEC 8859-8 1ii blankBSISO/IEC8859-8:1999 ii BSI 03-2000 Contents Page Foreword iii Introduction 1 1 Scope 1 2 Conformance 1 3 Normative references 1 4 Definitions 1 5 Notation, code table and names 2 6 Specification of the coded character set 3 7 Identification of the character set 5 Anne

9、x A (informative) Coverage of languages by parts1 to10 of ISO/IEC8859 7 Annex B (informative) Main differences between ISO8859-8:1988 and this first edition of this part of ISO/IEC8859 8 Annex C (informative) Bi-directional text support 8 Annex D (informative) Bibliography 9 Table 1 Character set, c

10、oded representation 4 Table 2 Code table of Latin/Hebrew alphabet 6 Table A.1 Language coverage 7BSISO/IEC8859-8:1999 BSI 03-2000 iii Foreword ISO (the International Organization for Standardization) and IEC (theInternational Electrotechnical Commission) form the specialized system for worldwide sta

11、ndardization. National bodies that are members of ISO or IEC participate in the development of International 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

12、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 technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC1. Draft International Standards adopted by t

13、he joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least75% of the national bodies casting a vote. International Standard ISO/IEC8859-8 was prepared by Joint Technical Committee ISO/IEC JTC1, Information technol

14、ogy, Subcommittee SC2, Coded character sets. This edition cancels and replaces ISO8859-8:1988 which has been technically revised. ISO/IEC8859 consists of the following parts, under the general title Information technology8-bit single-byte coded graphic character sets: Part1: Latin alphabet No.1; Par

15、t2: Latin alphabet No.2; Part3: Latin alphabet No.3; Part4: Latin alphabet No.4; Part5: Latin/Cyrillic alphabet; Part6: Latin/Arabic alphabet; Part7: Latin/Greek alphabet; Part8: Latin/Hebrew alphabet; Part9: Latin alphabet No.5; Part10: Latin alphabet No.6. Annex A to Annex D of this part of ISO/IE

16、C8859 are for information only.iv blankBSISO/IEC8859-8:1999 BSI 03-2000 1 Introduction ISO/IEC8859 consists of several parts. Each part specifies a set of up to191graphic characters and the coded representation of these characters by means of a single8-bitbyte. Each set is intended for use for a par

17、ticular group of languages. 1 Scope This part of ISO/IEC8859 specifies a set of155 coded graphic characters identified as Latin/Hebrew alphabet. This set of coded graphic characters is intended for use in data and text processing applications and also for information interchange. The set contains gr

18、aphic characters used for general purpose applications in typical office environments in at least the following languages: English, Hebrew, Latin. It is not intended for pointed Hebrew. This set of coded graphic characters may be regarded as a version of an8-bit code according to ISO/IEC2022 or ISO/

19、IEC4873 at level1. This part of ISO/IEC8859 may not be used in conjunction with any other parts of ISO/IEC8859. 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/IEC10367 should be used instead wit

20、hin a version of ISO/IEC4873 at level2 or level3. The coded characters in this set may be used in conjunction with coded control functions selected from ISO/IEC6429. However, control functions are not used to create composite graphic symbols from two or more graphic characters (see clause6). NOTEISO

21、/IEC8859 is not intended for use with Telematic services defined by ITU-T. If information coded according to ISO/IEC8859 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

22、A coded-character-data-element (CC-data-element) within coded information for interchange is in conformance with this part of ISO/IEC8859 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

23、in conformance with this part of ISO/IEC8859 if it conforms to the requirements of2.2.1, and either or both of2.2.2 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/IEC88

24、59 shall be the subject of 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 sup

25、ply any sequence of characters 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

26、 a CC-data-element, and that 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 provisio

27、ns which, through reference in this text, constitute provisions of this part of ISO/IEC8859. 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

28、 of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO/IEC2022:1994, Information technology Character code structure and extension techniques. ISO/IEC4873:1991, Information technology ISO8-bit

29、code for information interchange Structure and rules for implementation. ISO/IEC8824-1:1995, Information technology Abstract Syntax Notation One (ASN.1):Specification of basic notation. 4 Definitions For the purposes of this part of ISO/IEC8859 the following definitions apply: 4.1 bi-directional tex

30、t a text which may contain strings of characters with left-to-right and right-to-left directions 4.2 bit combination an ordered set of bits used for the representation of charactersBSISO/IEC8859-8:1999 2 BSI 03-2000 4.3 byte a bit string that is operated upon as a unit 4.4 character a member of a se

31、t of elements used for the organization, control, or representation of data 4.5 code table a table showing the characters allocated to each bit combination in a code 4.6 coded character set; code a set of unambiguous rules that establishes a character set and the one-to-one relationship between the

32、characters of the set and their bit combinations 4.7 coded-character-data-element (CC-data-element) an element of interchanged information 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

33、.8 directional character properties a set of mutually exclusive properties which may qualify the members of a character set. These properties are used by algorithms which transform text from processing sequence into presentation sequence. Examples of values for directional character properties are “

34、right-to-left”, “left-to-right”, “digit”, “numeric separator”, “neutral” 4.9 graphic character a character, other than a control function, that has a visual representation normally handwritten, printed or displayed, and that has a coded representation consisting of one or more bit combinations NOTEI

35、n ISO/IEC8859 a single bit combination is used to represent each character. 4.10 graphic symbol a visual representation of a graphic character or of a control function 4.11 implicit directionality a text presentation method in which the direction is determined by an algorithm. The algorithm is based

36、 on the directional character properties of the character, its position relative to the preceding and following character and to the primary direction 4.12 left-to-right character a character specific to a script written from left to right like the Latin script or the Greek script. Typical examples

37、are the letters AZ 4.13 position that part of a code table identified by its column and row coordinates 4.14 right-to-left character a character specific to a script written from right to left like the Arabic script or the Hebrew script. Typical examples are the letters of the Hebrew alphabet 5 Nota

38、tion, code table and names 5.1 Notation The bits of the bit combinations of the8-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-significant bit. The bit combinations may be int

39、erpreted 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 to15. The correspondence between the notations of the form

40、 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 weights8,4,2, and1 respectively. yy is the number represented by b 4 , b 3 , b 2and b 1where these bits are given the weights8,4,2, and1

41、 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 the number yy described above. Bit b 8 b 7 b 6 b 5 b 4 b

42、3 b 2 b 1 Weight 128 64 32 16 8 4 2 1BSISO/IEC8859-8:1999 BSI 03-2000 3 5.2 Layout of the code table An8-bit code table consists of256 positions arranged in16columns and16rows. The columns and the rows are numbered00 to15. In hexadecimal notation the columns and the rows are numbered0 to F. The code

43、 table positions are identified by notations 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 c

44、olumn number and k is the row number 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, o

45、f the form xx/yy, or of the form hk, is the same as that of the corresponding bit combination. 5.3 Names and meanings This part of ISO/IEC8859 assigns a unique name and a unique identifier to each graphic character. These names and identifiers have been taken from ISO/IEC10646-1 (E). This part of IS

46、O/IEC8859 also specifies an acronym for each of the characters SPACE, NO-BREAK SPACE, SOFT HYPHEN, LEFT-TO-RIGHT MARK and RIGHT-TO-LEFT MARK. 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. Except for SPACE (SP),

47、NO-BREAK SPACE (NBSP), SOFT HYPHEN (SHY), LEFT-TO-RIGHT MARK (LRM) and RIGHT-TO-LEFT MARK (RLM), this part of ISO/IEC8859 does not define and does not restrict the meanings of graphic characters. This part of ISO/IEC8859 specifies a graphic symbol for each graphic character. This symbol is shown in

48、the corresponding position 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/IEC10367 gives further information on this subject. 5.3.1 SPACE (SP) A graphic character the visual re

49、presentation of which consists 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 by a graphic symbol identical with, or similar to, that representing HYPHEN, for use when a line break has been established within a word. 5.3.4 LEFT-TO-RIGHT MARK (LRM) A graphic character the visual representation o