ANSI-ISO-4873-1991-R2003.pdf
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1、INCITS/ISO 4873-1991 (R2003) (formerly ANSI/ISO 4873-1991(R1998) for Information Processing - Bit Code for Information Interchange Structure and Rules for Implementation Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka
2、/9961031100 Not for Resale, 05/08/2007 21:52:47 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 21:52:47
3、MDTNo reproduction or networking permitted without license from IHS -,-,- American National Standard for Information Processing - Bit Code for Information Interchange - Structure and Rules for Implementation Secretariat Computer and Business Equipment Manufacturers Association Approved January 28,19
4、93 American National Standards Institute, Inc. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 21:52:47 MDTNo reproduction or networking permitted without license from IHS -,-,- A
5、merican National Standard Approval of an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review
6、, substantial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolu
7、tion. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The Ame
8、rican National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National
9、Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Instit
10、ute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Published by American National Standards Institute
11、 11 West 42nd Street, New York, New York 10036 Copyright 1991 by Information Technology Industry Council (ITI) All rights reserved. These materials are subject to copyright claims of International Standardization Organization (ISO), American National Standards Institute (ANSI), and Information Techn
12、ology Industry Council (ITI). 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 2000
13、5. Printed in the United States of America Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 21:52:47 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyr
14、ight American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 21:52:47 MDTNo reproduction or networking permitted without license from IHS -,-,- Contents 2 Conformance and implementation 2.1 Conform
15、ance 2.1.1 Conformance of information interchange 2.1.2 Conformance of devices 22 Implementation 3 Normative references 4 Definitions 4.1 active position 4.2 bit combination 4.3 byte 2 4.4 character 4.5 character position 4.6 coded-character-data-element (CC-data-element) 4.7 coded character set 4.8
16、 code extension 4.9 code table 4.10 control character 4.11 control function 4.12 device 4.13 escape sequence 4.14 Final Byte 4.15 graphic character 4.16 graphic symbol 4.17 repertoire 4.18 user 3 S Notation, code table and names 5.1 Notation S.2 Code table 5.3 Names 6 Structure of the code : A set o
17、f unambiguous rules that establishes a character set and the one-to- one relationship between the characters of the set and their bit combinations. 4.8 code extension : The techniques for the encoding of characters that are not included in the character set of a given code. 4.9 code table : A table
18、showing the character allocated to each bit combination in a code. 4.10 control character : A control function the coded representation of which consists of a single bit combination. 4.11 control function : An action that affects the recording, processing, transmission, or interpretation of data, an
19、d that has a coded representation consisting of one or more bit combinations. 4.12 device : A component of information processing equipment which can transmit. and/or receive, coded information within CC-data-elements. NOTE -It may be an input/output device in the conventional sense, or a process su
20、ch as an application program or gateway function. 4.13 escape sequence : A string of bit combinations that is used for control purposes in code extension procedures. The first of these bit combinations represents the control function ESCAPE. 4.14 Final Byte : The bit combination that terminates an e
21、scape sequence or a control sequence. 4.15 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 4.16 graphic symbol : A visual repres
22、entation of a graphic character or of a control function. 4.17 repertoire : A specified set of characters that are represented by means of one or more bit combinations of a coded character set. 4.18 user : A person or other entity that invokes the services provided by a device. NOTES 1. This entity
23、may be a process such as an application program if the “device” is a code convertor or a gateway function, for example. 2. The characters, as supplied by the user or made available to him, may be in the form of codes local to the device, or of non-conventional visible representations, provided that
24、2.1.2 above is satisfied. 5 Notation, code table and names 5.1 Notation The bits of the bit combinations of the - yy is the number represented by b, b, b, and b, where these bits are given the weights 8, 4,2 and 1 respectively. The notations of the form xx/yy are the same as the ones used to identif
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- ANSI ISO 4873 1991 R2003
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