1、 Reference number ISO/IEC 8824-4:2015(E) ISO/IEC 2015INTERNATIONAL STANDARD ISO/IEC 8824-4 Fifth edition 2015-11-15 Information technology Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications Technologies de linformation Notation de syntaxe abstraite numro un (ASN.1): Param
2、trage des spcifications de la notation de syntaxe abstraite numro un ISO/IEC 8824-4:2015(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 mechan
3、ical, including photocopying, or posting on the 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
4、11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2015 All rights reservedISO/IEC 8824-4:2015(E) ISO/IEC 2015 All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commis
5、sion) 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 established by the respective organization to deal with particular fields of technical activity. ISO
6、and IEC technical 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/
7、IEC JTC 1. 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
8、 bodies for voting. Publication 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 this document may be the subject of patent rights. ISO and IEC shall not be held responsible for i
9、dentifying any or all such patent rights. This fifth edition cancels and replaces the fourth edition of ISO/IEC 8824-4:2008 which has been technically revised. It also incorporates ISO/IEC 8824-4:2008/Cor.1:2014. ISO/IEC 8824-4 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information tec
10、hnology, Subcommittee SC 6, Telecommunications and information exchange between systems, in collaboration with ITU-T. The identical text is published as ITU-T X.683 (08/2015). I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T X.683 TELECOMMUNICATION STANDARDIZATION SECTOR O
11、F ITU (08/2015) SERIES X: DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY OSI networking and system aspects Abstract Syntax Notation One (ASN.1) Information technology Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications Recommendation ITU-T X.683 ITU-T X-SERIES RECO
12、MMENDATIONS DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS 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 INTERCONNEC
13、TION Model and notation X.200X.209 Service definitions 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 Conf
14、ormance testing X.290X.299 INTERWORKING BETWEEN NETWORKS 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 se
15、rvice X.640X.649 Naming, Addressing and Registration 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 f
16、unctions and ODMA functions X.730X.799 SECURITY X.800X.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
17、X.1000X.1099 SECURE APPLICATIONS AND SERVICES X.1100X.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.
18、 ITU-T X.683 (08/2015) i INTERNATIONAL STANDARD ISO/IEC 8824-4 RECOMMENDATION ITU-T X.683 Information technology Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications Summary Recommendation ITU-T X.683 | ISO/IEC 8824-4 defines the provisions for parameterized reference names
19、 and parameterized assignments for data types which are useful for the designer when writing specifications where some aspects are left undefined at certain stages of the development to be filled in at a later stage to produce a complete definition of an abstract syntax. History Edition Recommendati
20、on Approval Study Group Unique ID *1.0 ITU-T X.683 1994-07-01 7 11.1002/1000/3045 2.0 ITU-T X.683 1997-12-12 7 11.1002/1000/4446 2.1 ITU-T X.683 (1997) Amd. 1 1999-06-18 7 11.1002/1000/4703 3.0 ITU-T X.683 2002-07-14 17 11.1002/1000/6088 3.1 ITU-T X.683 (2002) Technical Cor. 1 2007-05-29 17 11.1002/
21、1000/9107 4.0 ITU-T X.683 2008-11-13 17 11.1002/1000/9607 4.1 ITU-T X.683 (2008) Cor. 1 2014-03-01 17 11.1002/1000/12146 5.0 ITU-T X.683 2015-08-13 17 11.1002/1000/12482 *To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recomm
22、endations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T X.683 (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
23、 Telecommunication Standardization Sector (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 Standardiza
24、tion Assembly (WTSA), which meets every 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 techn
25、ology which fall within ITU-Ts purview, 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. Complian
26、ce with this Recommendation is voluntary. 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 oblig
27、atory language such as “must“ and the 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 implementatio
28、n of this Recommendation may involve the 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
29、the date of approval of this Recommendation, 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
30、consult the TSB patent database at http:/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.683 (08/2015) iii CONTENTS Page Introduction . iv 1 Scope 1 2 Normative ref
31、erences 1 2.1 Identical Recommendations | International Standards . 1 3 Definitions 1 3.1 Specification of basic notation 1 3.2 Information object specification 1 3.3 Constraint specification . 1 3.4 Additional definitions 1 4 Abbreviations . 2 5 Convention . 2 6 Notation 2 6.1 Assignments 2 6.2 Par
32、ameterized definitions 2 6.3 Symbols . 3 7 ASN.1 lexical items 3 8 Parameterized assignments . 3 9 Referencing parameterized definitions . 5 10 Abstract syntax parameters . 8 Annex A Examples . 9 A.1 Example of the use of a parameterized type definition 9 A.2 Example of use of parameterized definiti
33、ons together with an information object class . 9 A.3 Example of parameterized type definition that is finite . 10 A.4 Example of a parameterized value definition 11 A.5 Example of a parameterized value set definition . 11 A.6 Example of a parameterized class definition . 11 A.7 Example of a paramet
34、erized object set definition 12 A.8 Example of a parameterized object set definition 12 Annex B Summary of the notation 13 iv Rec. ITU-T X.683 (08/2015) Introduction Application designers need to write specifications in which certain aspects are left undefined. Those aspects will later be defined by
35、 one or more other groups (each in its own way), to produce a fully defined specification for use in the definition of an abstract syntax (one for each group). In some cases, aspects of the specification (for example, bounds) may be left undefined even at the time of abstract syntax definition, bein
36、g completed by the specification of International Standardized Profiles or functional profiles from some other body. NOTE 1 It is a requirement imposed by this Recommendation | International Standard that any aspect that is not solely concerned with the application of constraints has to be completed
37、 prior to the definition of an abstract syntax. In the extreme case, some aspects of the specification may be left for the implementer to complete, and would then be specified as part of the Protocol Implementation Conformance Statement. While the provisions of Rec. ITU-T X.681 | ISO/IEC 8824-2 and
38、Rec. ITU-T X.682 | ISO/IEC 8824-3 provide a framework for the later completion of parts of a specification, they do not of themselves solve the above requirements. Additionally, a single designer sometimes requires to define many types, or many information object classes, or many information object
39、sets, or many information objects, or many values, which have the same outer level structure, but differ in the types, or information object classes, or information object sets, or information objects, or values, that are used at an inner level. Instead of writing out the outer level structure for e
40、very such occurrence, it is useful to be able to write it out once, with parts left to be defined later, then to refer to it and provide the additional information. All these requirements are met by the provision for parameterized reference names and parameterized assignments by this Recommendation
41、| International Standard. The syntactic form of a parameterized reference name is the same as that of the corresponding normal reference name, but the following additional considerations apply: When it is assigned in a parameterized assignment statement, it is followed by a list of dummy reference n
42、ames in braces, each possibly accompanied by a governor; these reference names have a scope which is the right-hand side of the assignment statement, and the parameter list itself. NOTE 2 This is what causes it to be recognized as a parameterized reference name. When it is exported or imported, it i
43、s followed by a pair of empty braces to distinguish it as a parameterized reference name. When it is used in any construct, it is followed by a list of syntactic constructions, one for each dummy reference name, that provide an assignment to the dummy reference name for the purposes of that use only
44、. Dummy reference names have the same syntactic form as the corresponding normal reference name, and can be used anywhere on the right-hand side of the assignment statement that the corresponding normal reference name could be used. All such usages are required to be consistent. ISO/IEC 8824-4 : 200
45、5 (E) Rec. ITU-T X.683 (08/2015) 1 INTERNATIONAL STANDARD ITU-T RECOMMENDATION Information technology Abstract Syntax Notation One (ASN.1): Parameterization of ASN.1 specifications 1 Scope This Recommendation | International Standard is part of Abstract Syntax Notation One (ASN.1) and defines notati
46、on for parameterization of ASN.1 specifications. 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation | International Standard. At the time of publication, the editions
47、indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation | International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Member
48、s of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations | International Standards Recommendation ITU-T X.680 (2015) | ISO/IEC 8824-
49、1:2015, Information technology Abstract Syntax Notation One (ASN.1): Specification of basic notation. Recommendation ITU-T X.681 (2015) | ISO/IEC 8824-2:2015, Information technology Abstract Syntax Notation One (ASN.1): Information object specification. Recommendation ITU-T X.682 (2015) | ISO/IEC 8824-3:2015, Information technology Abstract Syntax Notation One (ASN.1): Constraint specification. 3 Definitions For the purposes of this Recommendation | International Standard, the following
