1、 Reference number ISO/IEC 8824-1:2015(E) ISO/IEC 2015INTERNATIONAL STANDARD ISO/IEC 8824-1 Fifth edition 2015-11-15 Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation Technologies de linformation Notation de syntaxe abstraite numro un (ASN.1): Spcification
2、 de la notation de base ISO/IEC 8824-1:2015(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on t
3、he internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs 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 copyrightiso.
4、org Web www.iso.org Published in Switzerland ii ISO/IEC 2015 All rights reservedISO/IEC 8824-1:2015(E) ISO/IEC 2015 All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwi
5、de standardization. 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 f
6、ields 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 JTC 1. International Standards are drafte
7、d 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. Publication as an Interna
8、tional 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 this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. Thi
9、s fifth edition cancels and replaces the fourth edition of ISO/IEC 8824-1:2008 which has been technically revised. It also incorporates ISO/IEC 8824-1:2008/Cor.1:2012 and ISO/IEC 8824-5:2008.Cor.2:2014. ISO/IEC 8824-1 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, S
10、ubcommittee SC 6, Telecommunications and information exchange between systems, in collaboration with ITU-T. The identical text is published as ITU-T X.680 (08/2015). International Telecommunication Union ITU-T X.680 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (08/2015) SERIES X: DATA NETWORKS, O
11、PEN SYSTEM COMMUNICATIONS AND SECURITY OSI networking and system aspects Abstract Syntax Notation One (ASN.1) Information technology Abstract Syntax Notation One (ASN.1): Specification of basic notation Recommendation ITU-T X.680 ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS, OPEN SYSTEM COMMUNICATIO
12、NS AND SECURITY PUBLIC DATA NETWORKS Services and facilities X.1X.19 Interfaces X.20X.49 Transmission, signalling and switching X.50X.89 Network aspects X.90X.149 Maintenance X.150X.179 Administrative arrangements X.180X.199 OPEN SYSTEMS INTERCONNECTION Model and notation X.200X.209 Service definiti
13、ons X.210X.219 Connection-mode protocol specifications X.220X.229 Connectionless-mode protocol specifications X.230X.239 PICS proformas X.240X.259 Protocol Identification X.260X.269 Security Protocols X.270X.279 Layer Managed Objects X.280X.289 Conformance testing X.290X.299 INTERWORKING BETWEEN NET
14、WORKS General X.300X.349 Satellite data transmission systems X.350X.369 IP-based networks X.370X.379 MESSAGE HANDLING SYSTEMS X.400X.499 DIRECTORY X.500X.599 OSI NETWORKING AND SYSTEM ASPECTS Networking X.600X.629 Efficiency X.630X.639 Quality of service X.640X.649 Naming, Addressing and Registratio
15、n X.650X.679 Abstract Syntax Notation One (ASN.1) X.680X.699 OSI MANAGEMENT Systems management framework and architecture X.700X.709 Management communication service and protocol X.710X.719 Structure of management information X.720X.729 Management functions and ODMA functions X.730X.799 SECURITY X.8
16、00X.849 OSI APPLICATIONS Commitment, concurrency and recovery X.850X.859 Transaction processing X.860X.879 Remote operations X.880X.889 Generic applications of ASN.1 X.890X.899 OPEN DISTRIBUTED PROCESSING X.900X.999 INFORMATION AND NETWORK SECURITY X.1000X.1099 SECURE APPLICATIONS AND SERVICES X.110
17、0X.1199 CYBERSPACE SECURITY X.1200X.1299 SECURE APPLICATIONS AND SERVICES X.1300X.1399 CYBERSECURITY INFORMATION EXCHANGE X.1500X.1599 CLOUD COMPUTING SECURITY X.1600X.1699 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T X.680 (08/2015) i INTERNATIONAL STANDARD ISO
18、/IEC 8824-1 RECOMMENDATION ITU-T X.680 Information technology Abstract Syntax Notation One (ASN.1): Specification of basic notation Summary Recommendation ITU-T X.680 | ISO/IEC 8824-1 provides a notation called Abstract Syntax Notation One (ASN.1) for defining the syntax of information data. It defi
19、nes a number of simple data types and specifies a notation for referencing these types and for specifying values of these types. The ASN.1 notations can be applied whenever it is necessary to define the abstract syntax of information without constraining in any way how the information is encoded for
20、 transmission. History Edition Recommendation Approval Study Group Unique ID *1.0 ITU-T X.680 1994-07-01 7 11.1002/1000/3040 1.1 ITU-T X.680 (1994) Amd. 1 1995-04-10 7 11.1002/1000/3041 1.2 ITU-T X.680 (1994) Technical Cor. 1 1995-11-21 7 11.1002/1000/3282 1.3 ITU-T X.680 (1994) Technical Cor. 2 199
21、7-12-12 7 11.1002/1000/4180 1.4 ITU-T X.680 (1994) Amd. 1/Technical Cor.1 1997-12-12 7 11.1002/1000/4179 1.5 ITU-T X.680 (1994) Amd. 2 1997-12-12 7 11.1002/1000/4181 2.0 ITU-T X.680 1997-12-12 7 11.1002/1000/4449 2.1 ITU-T X.680 (1997) Technical Cor. 1 1999-06-18 7 11.1002/1000/4700 2.2 ITU-T X.680
22、(1997) Amd. 1 1999-06-18 7 11.1002/1000/4698 2.3 ITU-T X.680 (1997) Amd. 2 1999-06-18 7 11.1002/1000/4699 2.4 ITU-T X.680 (1997) Technical Cor. 2 2000-03-31 7 11.1002/1000/5046 2.5 ITU-T X.680 (1997) Technical Cor. 3 2001-02-02 7 11.1002/1000/5331 2.6 ITU-T X.680 (1997) Technical Cor. 4 2001-03-15 7
23、 11.1002/1000/5332 2.7 ITU-T X.680 (1997) Amd. 3 2001-10-29 7 11.1002/1000/5562 2.8 ITU-T X.680 (1997) Amd. 4 2001-10-29 7 11.1002/1000/5563 3.0 ITU-T X.680 2002-07-14 17 11.1002/1000/6085 3.1 ITU-T X.680 (2002) Amd. 1 2003-10-29 17 11.1002/1000/7019 3.2 ITU-T X.680 (2002) Amd. 2 2004-08-29 17 11.10
24、02/1000/7291 3.3 ITU-T X.680 (2002) Technical Cor. 1 2005-05-14 17 11.1002/1000/8512 3.4 ITU-T X.680 (2002) Amd. 3 2006-06-13 17 11.1002/1000/8836 3.5 ITU-T X.680 (2002) Amd. 4 2007-05-29 17 11.1002/1000/9105 4.0 ITU-T X.680 2008-11-13 17 11.1002/1000/9604 4.1 ITU-T X.680 (2008) Cor. 1 2011-10-14 17
25、 11.1002/1000/11376 4.2 ITU-T X.680 (2008) Cor. 2 2014-03-01 17 11.1002/1000/12144 5.0 ITU-T X.680 2015-08-13 17 11.1002/1000/12479 *To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http
26、:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T X.680 (08/2015) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sec
27、tor (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets ever
28、y four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview
29、, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is volunta
30、ry. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the
31、negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve t
32、he use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommend
33、ation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at htt
34、p:/www.itu.int/ITU-T/ipr/. ITU 2015 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T X.680 (08/2015) iii CONTENTS Page Introduction . viii 1 Scope 1 2 Normative references 1 2.1 Identical Recommendati
35、ons | International Standards . 1 2.2 Additional references 2 3 Definitions 2 3.1 International Object Identifier tree specification . 2 3.2 Information object specification 2 3.3 Constraint specification . 3 3.4 Parameterization of ASN.1 specification 3 3.5 Structure for identification of organizat
36、ions 3 3.6 Universal Multiple-Octet Coded Character Set (UCS) 3 3.7 Representation of dates and times . 3 3.8 Additional definitions 4 4 Abbreviations . 9 5 Notation 9 5.1 General 9 5.2 Productions 10 5.3 The alternative collections 10 5.4 Non-spacing indicator . 10 5.5 Example of a production . 10
37、5.6 Layout . 11 5.7 Recursion 11 5.8 References to permitted sequences of lexical items 11 5.9 References to a lexical item . 11 5.10 Short-hand notations . 11 5.11 Value references and the typing of values . 12 6 The ASN.1 model of type extension . 12 7 Extensibility requirements on encoding rules
38、. 12 8 Tags 13 9 Encoding instructions . 14 10 Use of the ASN.1 notation 14 11 The ASN.1 character set . 15 12 ASN.1 lexical items 16 12.1 General rules . 16 12.2 Type references . 17 12.3 Identifiers 17 12.4 Value references 17 12.5 Module references . 17 12.6 Comments 17 12.7 Empty lexical item .
39、18 12.8 Numbers 18 12.9 Real numbers . 18 12.10 Binary strings 18 12.11 XML binary string item . 18 12.12 Hexadecimal strings 18 12.13 XML hexadecimal string item . 19 12.14 Character strings 19 12.15 XML character string item 20 iv Rec. ITU-T X.680 (08/2015) 12.16 The simple character string lexica
40、l item 22 12.17 Time value character strings 22 12.18 XML time value character string item . 22 12.19 The property and setting names lexical item . 22 12.20 Assignment lexical item 22 12.21 Range separator . 22 12.22 Ellipsis . 22 12.23 Left version brackets . 23 12.24 Right version brackets . 23 12
41、.25 Encoding references 23 12.26 Integer-valued Unicode labels . 23 12.27 Non-integer Unicode labels . 23 12.28 XML end tag start item . 23 12.29 XML single tag end item . 23 12.30 XML boolean true item . 23 12.31 XML boolean extended-true item . 24 12.32 XML boolean false item 24 12.33 XML boolean
42、extended-false item 24 12.34 XML real not-a-number item 24 12.35 XML real infinity item 24 12.36 XML tag names for ASN.1 types 25 12.37 Single character lexical items 26 12.38 Reserved words . 26 13 Module definition . 27 14 Referencing type and value definitions . 31 15 Notation to support referenc
43、es to ASN.1 components 32 16 Assigning types and values . 33 17 Definition of types and values 35 18 Notation for the boolean type . 38 19 Notation for the integer type . 38 20 Notation for the enumerated type . 39 21 Notation for the real type 41 22 Notation for the bitstring type . 42 23 Notation
44、for the octetstring type . 44 24 Notation for the null type 45 25 Notation for sequence types 45 26 Notation for sequence-of types . 48 27 Notation for set types 51 28 Notation for set-of types . 52 29 Notation for choice types 52 30 Notation for selection types 54 31 Notation for prefixed types . 5
45、5 31.1 General 55 31.2 The tagged type . 55 31.3 The encoding prefixed type . 56 32 Notation for the object identifier type 57 33 Notation for the relative object identifier type 58 34 Notation for the OID internationalized resource identifier type . 60 35 Notation for the relative OID international
46、ized resource identifier type 60 36 Notation for the embedded-pdv type 61 Rec. ITU-T X.680 (08/2015) v 37 Notation for the external type . 63 38 The time type 64 38.1 General 64 38.2 Time properties and settings of time abstract values . 64 38.3 Basic value notation and XML value notation for time a
47、bstract values with specified property settings 68 38.4 Useful time types . 72 39 The character string types . 74 40 Notation for character string types 74 41 Definition of restricted character string types . 75 42 Naming characters, collections and property category sets 79 43 Canonical order of ch
48、aracters . 82 44 Definition of unrestricted character string types . 83 45 Notation for types defined in clauses 46 to 48 84 46 Generalized time . 84 47 Universal time 86 48 The object descriptor type 87 49 Constrained types . 87 50 Element set specification 88 51 Subtype elements 90 51.1 General 90
49、 51.2 Single value . 92 51.3 Contained subtype . 92 51.4 Value range . 92 51.5 Size constraint . 92 51.6 Type constraint 93 51.7 Permitted alphabet . 93 51.8 Inner subtyping 93 51.9 Pattern constraint . 95 51.10 Property settings 95 51.11 Duration range . 96 51.12 Time point range . 96 51.13 Recurrence range . 97 52 The extension marker . 97 53 The exception identifier 99 54 Encoding control sections . 99 Annex A ASN.1 regular expressions 101 A.1 Definition 101 A.2 Metacharacters 101 Annex B The defined time types
