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ISO/IEC International Standard 10646-1 ISO/IEC 10646:2008 (E) Working Draft ISO/IEC International Standard WG2 N3230 International Standard 10646 ISO/IEC 10646 2nd Edition Information technology — Universal Multiple-Octet Coded Character Set (UCS) — Architecture and Basic Multilingual Plane Supplementary Planes WORKING DRAFT ISO/IEC 10646:2008 (E) Working Draft PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. © ISO/IEC 2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.ch Printed in Switzerland ii © ISO/IEC 2008 – All rights reserved ISO/IEC 10646:2008 (E) Working Draft Contents Page 1 Scope ................................................................................................................. 1 2 Conformance ...................................................................................................... 1 3 Normative references ......................................................................................... 2 4 Terms and definitions ......................................................................................... 2 5 General structure of the UCS ............................................................................. 5 6 Basic structure and nomenclature ...................................................................... 5 7 Revision and updating of the UCS ..................................................................... 8 8 Subsets .............................................................................................................. 8 9 UCS encoding forms .......................................................................................... 9 10 Encoding schemes ........................................................................................... 10 11 Use of control functions with the UCS .............................................................. 11 12 Declaration of identification of features ............................................................ 12 13 Structure of the code tables and lists ............................................................... 13 14 Block and collection names .............................................................................. 13 15 Mirrored characters in bidirectional context ..................................................... 13 16 Special characters ............................................................................................ 14 17 Presentation forms of characters ..................................................................... 17 18 Compatibility characters ................................................................................... 17 19 Order of characters .......................................................................................... 17 20 Combining characters ...................................................................................... 18 21 Normalization forms ......................................................................................... 19 22 Special features of individual scripts and symbol repertoires .......................... 19 23 Source references for CJK Ideographs ............................................................ 20 24 Character names and annotations ................................................................... 23 25 Named UCS Sequence Identifiers ................................................................... 27 26 Structure of the Basic Multilingual Plane .......................................................... 29 27 Structure of the Supplementary Multilingual Plane for Scripts and symbols .... 31 28 Structure of the Supplementary Ideographic Plane ......................................... 32 29 Structure of the Supplementary Special-purpose Plane .................................. 32 30 Code tables and lists of character names ........................................................ 32 Annexes Annex A: Collections of graphic characters for subsets ......................................... 1349 Annex F: Format characters ................................................................................... 1364 Annex L: Character naming guidelines .................................................................. 1370 Annex M: Sources of characters ............................................................................ 1372 Annex N: External references to character repertoires .......................................... 1376 Annex P: Additional information on characters ...................................................... 1378 Annex Q: Code mapping table for Hangul syllables ............................................... 1381 Annex R: Names of Hangul syllables ..................................................................... 1382 Annex S: Procedure for the unification and arrangement of CJK Ideographs ....... 1383 Annex T: Language tagging using Tag Characters ................................................ 1392 Annex U: Characters in identifiers .......................................................................... 1393 © ISO/IEC 2008 – All rights reserved iii ISO/IEC 10646:2008 (E) Working Draft iv © ISO/IEC 2008 – All rights reserved ISO/IEC 10646:2008 (E) Working Draft Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Com- mission) 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 estab- lished by the respective organization to deal with particular fields of technical activity. ISO and IEC tech- nical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publica- tion as an International Standard requires approval by at least 75% of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of ISO/IEC 10646 may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. International Standard ISO/IEC 10646 was prepared by Joint Technical Committee ISO/IEC JTC1, Infor- mation technology, Subcommittee SC 2, Coded Character sets. This second edition of ISO/IEC 10646 cancels and replaces ISO/IEC 10646:2003. It also incorporates ISO/IEC 10646:2003/Amd.1:2005, ISO/IEC 10646:2003/Amd.2:2006, ISO/IEC 10646:2003/Amd.3:2007, and /IEC 10646:2003/Amd.3:2008. © ISO/IEC 2008 – All rights reserved v ISO/IEC 10646:2008 (E) Working Draft Introduction ISO/IEC 10646 specifies the Universal Multiple-Octet Coded Character Set (UCS). It is applicable to the representation, transmission, interchange, processing, storage, input and presentation of the written form of the languages of the world as well as additional symbols. By defining a consistent way of encoding multilingual text it enables the exchange of data internationally. The information technology industry gains data stability, greater global interoperability and data interchange. ISO/IEC 10646 has been widely adopted in new Internet protocols and implemented in modern operating systems and computer languages. This edition covers over 99 000 characters from the world‟s scripts. ISO/IEC 10646 contains material which may only be available to users who obtain their copy in a machine readable format. That material consists of the following printable files: CJKU_SR.txt CJKC_SR.txt IICORE.txt HangulX.txt HangulTb.pdf HangulSy.txt vi © ISO/IEC 2008 – All rights reserved INTERNATIONAL STANDARD ISO/IEC 10646: 2008 (E) Working Draft Information technology — Universal Multiple-Octet Coded Character Set (UCS) — 1 Scope 2 Conformance ISO/IEC 10646 specifies the Universal Multiple-Octet Coded Character Set (UCS). It is applicable to the repre- 2.1 General sentation, transmission, interchange, processing, storage, Whenever private
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