ISO/IEC INTERNATIONAL STANDARD 2022 Fourth edition 1994-12-01 Information technology Character code structure and extension techniques Technologies de l'information Structure de code de caracteres et techniques d'extension Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Standard. Date of ANSI Approval: 1/14/99 Published by American National Standards Institute, 25West43rdStreet,NewYork,NewYork10036 Copyright 2002 by Information Technology Industry Council (ITI) Allrights reserved. These materials are subject to copyright claims of International Standardization Organization (isO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITl). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America IEC Tso Reference number ISO/IEC2022:1994(E) Copyright American National Standards Institute Licensee=Chongqing Insttuteofquality and Standardizationb5990390 ISO/IEC 2022:1994 (E) Contents Page 1 Section 1 - General 1 Scope 1 2 2 Conformance 2 2.1 Types of conformance 2 2.2 Conformance of information interchange 2.3 Conformance of devices 2 2.3.1 Device description 2 2 2.3.2 Originating devices 2 2.3.3 Receiving devices 3 3 Normative references 4 Definitions 3 4.1 bit combination 3 4.2 byte 3 3 4.3 character 4.4 coded-character-data-element (CC-data-element) 3 4.5 coded character set; code 3 4.6 code extension 3 3 4.7codetable 3 4.8 combining character 4.9 control character 3 4.10 control function 3 3 4.11 to designate 4 4.12 device 4 4.13 escape sequence 4.14 Final Byte 4 4 4.15 graphic character 4.16 graphic symbol 4 4.17 Intermediate Byte 4 4.18 to invoke 4 4 4.19 repertoire 4.20 to represent 4 4.21 user 4 5 Notation, code tables and names 4 4 5.1 Notation 5.2 Code tables 5 5 5.3 Names of characters 6 Section 2 - Character sets and codes 6 6 Characters and character sets @IS0/EC1994 All rights reserved. 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 per- mission in writing from the publisher Printed in Switzerland Licensee=Chongqing Institute of quality and Standardizationb 5990390 d without license from IHS ISO/IEC 2022:1994 (E) CISO/IEC 6.1 Types of characters and character sets 6 6.2 Fixed coded characters 6 6.2.1 Character DELETE 6 6.2.2 Character ESCAPE 6 6.2.3 Character SPACE 6 6.3 Sets of coded graphic characters 6 6.3.1 Types of coded graphic character set 6 6.3.2 Contents of a coded graphic character set 9 6.3.3 Combination of graphic characters 9 6.3.4 Sources of coded graphic character sets 9 6.4 Sets of coded control functions 9 6.4.1 Types of coded control function set 9 6.4.2 Primary sets of coded control functions 10 6.4.3 Supplementary sets of coded control functions 10 6.4.4 Sources of coded control function sets 10 6.5 Coded single additional control functions 11 6.5.1 Standardized single control functions 11 6.5.2 Registered single control functions 11 6.5.3 Private control functions 11 6.5.4 Sources of coded single control functions 11 7 The elements of 8-bit and 7-bit codes 11 7.1 Summary of the elements 11 7.2 Character-set code elements 12 7.3 Invocation of character-set code elements 13 7.4 Coded code-identification functions 13 7.5 Unique coding of graphic characters 14 8 Structure of 8-bit codes 14 8.1 Code table layout for 8-bit codes 14 8.2 Elements and structure of the code 15 8.3 Invocation of graphic character sets by means of shift functions 15 8.3.1 LOCKING-SHIFT ZERO, .. ONE, .. TWO, and .. THREE 15 8.3.2 LOCKING SHIFT ONE RIGHT, .. TWO RIGHT , and .. THREE RIGHT 16 8.3.3 Shift status 16 8.3.4 I