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GB/T 16263.1-2025: Information technology - ASN.1 encoding rules - Part 1: Specification of Basic Encoding Rules(BER), Canonical Encoding Rules(CER) and Distinguished Encoding Rules(DER)
Status: Valid GB/T 16263.1: Evolution and historical versions
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| GB/T 16263.1-2025 | English | 779 |
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Information technology - ASN.1 encoding rules - Part 1: Specification of Basic Encoding Rules(BER), Canonical Encoding Rules(CER) and Distinguished Encoding Rules(DER)
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GB/T 16263.1-2025
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| GB/T 16263.1-2006 | English | 634 |
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Information technology -- ASN.1 encoding rules -- Part 1: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
| Valid |
GB/T 16263.1-2006
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| GB/T 16263-1996 | English | 839 |
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Information processing system--Open systems interconnection--Specification of basic encoding rules for abstract syntax notation one (ASN. 1)
| Obsolete |
GB/T 16263-1996
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PDF similar to GB/T 16263.1-2025
Basic data | Standard ID | GB/T 16263.1-2025 (GB/T16263.1-2025) | | Description (Translated English) | Information technology - ASN.1 encoding rules - Part 1: Specification of Basic Encoding Rules(BER), Canonical Encoding Rules(CER) and Distinguished Encoding Rules(DER) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L79 | | Classification of International Standard | 35.100.60 | | Word Count Estimation | 38,330 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-11-01 | | Older Standard (superseded by this standard) | GB/T 16263.1-2006 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 16263.1-2025: Information technology - ASN.1 encoding rules - Part 1: Specification of Basic Encoding Rules (BER) , Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
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ICS 35.100.60
CCSL79
National Standard of the People's Republic of China
Replaces GB/T 16263.1-2006
Information technology ASN.1 encoding rules
Part 1.Basic Encoding Rules (BER),
Regular Encoding Rules (CER) and
Degenerate Encoding Rules (DER) Specification
(ISO /IEC 8825-1.2021, IDT)
Published on April 25, 2025, implemented on November 1, 2025
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
Introduction V
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Abbreviations 3
5 Notation 3
6 Agreement 3
7 Compliance 3
8 Basic coding structure 4
8.1 General Rules for Coding 4
8.2 Encoding of Boolean Values 7
8.3 Encoding of integer values 7
8.4 Encoding of enumeration values 8
8.5 Encoding of real values 8
8.6 Encoding of bit string values 9
8.7 Encoding of octet string values 10
8.8 Encoding of Null Values 11
8.9 Encoding of sequence values 11
8.10 Encoding of a single sequence value 11
8.11 Encoding of collection values 11
8.12 Encoding of a single set value 11
8.13 Encoding of selected values 12
8.14 Encoding of prefixed type values 12
8.15 Open Type Encoding 12
8.16 Encoding of singleton values 13
8.17 Encoding of embedded pdv type values 13
8.18 Encoding of external type values 13
8.19 Encoding of object identifier values 14
8.20 Encoding of associated object identifier values 15
8.21 Encoding of OID Internationalized Resource Identifier Values 15
8.22 Encoding of Relative OID Internationalized Resource Identifier Values 16
8.23 Encoding of restricted string values 16
8.24 Encoding of unrestricted string values 18
8.25 Encoding of Useful Type Values 18
8.26 The TIME type and the encoding of useful time type values 18
9 Regular encoding rules 19
9.1 Length form 19
9.2 String Encoding Format 19
9.3 Collection Components 19
10 Atypical Coding Rules 20
10.1 Length format 20
10.2 String Encoding Format 20
10.3 Collection Components 20
11 Limitations of BER Use for CER and DER 20
11.1 Boolean values 20
11.2 Unused bit 20
11.3 Real Values 21
11.4 GeneralString value 21
11.5 Collection and Sequence Components with Default Values 21
11.6 Single Collection Components 21
11.7 GeneralizedTime 21
11.8 UTCTime(Universal Coordinated Time) 22
11.9 TIME Type and Useful Time Types 22
12 Use of BER, CER and DER in transfer syntax definition 22
Appendix A (Informative) Coding Example 24
Appendix B (Informative) Object Identifier Assignment 27
Appendix C (Informative) Examples of real value encoding 28
References 30
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 1 of GB/T 16263 Information Technology ASN.1 Coding Rules. GB/T 16263 has published the following
part.
--- Part 1.Specifications of Basic Encoding Rules (BER), Regular Encoding Rules (CER) and Untypical Encoding Rules (DER);
--- Part 2.Specification of Restricted Encoding Rules (PER);
--- Part 4.XML Encoding Rules (XER);
--- Part 5.Mapping of W3C XML Schema Definitions to ASN.1.
This document replaces GB/T 16263.1-2006 "Information Technology ASN.1 Encoding Rules Part 1.Basic Encoding Rules (BER),
Compared with GB/T 16263.1-2006, the Standard for Regular Encoding Rules (CER) and Untypical Encoding Rules (DER) has made structural adjustments and
In addition to logical changes, the main technical changes are as follows.
--- "UTF8" was added to the abbreviations and "ULA" was deleted (see Chapter 4, Chapter 4 of the.2006 edition);
--- Added relevant provisions on coding structure (see 8.1.1.5);
--- Changed the description of real value 0 encoding (see 8.5.2, 8.5.3 and 8.5.9, 8.5.2 and 8.5.8 of the.2006 edition);
--- Added relevant provisions for "encoding of prefixed type values" (see 8.14.1);
--- Added "Encoding of OID international resource identifier values", "Encoding of relative OID international resource identifier values", "TIME class
relevant provisions of "Encoding of Type and Useful Time Type Values" (see 8.21, 8.22 and 8.26);
--- Added the relevant provisions for converting "TIME type and useful time type values" to the standard format (see 11.9);
--- Added "OID International Resource Identifier" to identify and describe basic encoding rules (see Chapter 12);
This document is equivalent to ISO /IEC 8825-1.2021 "Information technology ASN.1 encoding rules Part 1.Basic encoding rules
(BER), Regular Encoding Rules (CER), and Degenerate Encoding Rules (DER) specifications.
The following minimal editorial changes were made to this document.
--- Change the normative references to specific clauses in the text to date references;
--- Delete the "Note" in the normative reference documents and quote the latest version of ISO /IEC 10646.The reference content does not involve technical changes;
--- In Chapter 4, the abbreviation "ULA" which is not cited in the whole text is deleted;
---Unify the abbreviations "UTF-8" and "UTF8" throughout the text to the abbreviation "UTF8" defined in Chapter 4.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed and coordinated by the National Technical Committee for Information Technology Standardization (SAC/TC28).
This document was drafted by. China Electronics Technology Standardization Institute, Shenzhen CESI Information Technology Co., Ltd., Chinese Academy of Sciences
Research Institute, Lenovo (Beijing) Co., Ltd., Jiangsu CESI Technology Development Co., Ltd., Holsat Technology Group Co., Ltd., Beijing Telecom Regulatory Commission
Planning and Design Institute Co., Ltd., Shanghai Tianchen Micro-Nano Technology Co., Ltd., China Mobile (Hangzhou) Information Technology Co., Ltd., Anhui Telecom Planning
Design Co., Ltd., Institute of Automation, Chinese Academy of Sciences, Wuxi Internet of Things Industry Research Institute, Tianjin Special Equipment Supervision and Inspection Technology
Research Institute, Chongqing Quality and Standardization Research Institute, and Shilian Power Information Technology Co., Ltd.
The main drafters of this document are. Su Jingru, Zhang Xueqian, Zhang Chi, Liu Min, Ma Yilong, Wang Yuwei, Zhang Feng, Li Jiajing, Zhou Lixiong, Jia Jingrun,
Liu Qiong, He Saike, Luan Haijing, Wang Yawei, Wu Mingjuan, Wang Xuan, Zhang Cheng, Liu Yumei, Xiang Lei, Dong Xuan, Zhao Yizheng, Zhang Peijie, Chen Shuyi, Li Jufeng,
Sun Fanli and Liu Bilong.
The previous versions of this document and the documents it replaces are as follows.
---First published in.1996 as GB/T 16263-1996;
---First revised in.2006 to GB/T 16263.1-2006;
---This is the second revision.
Introduction
GB/T 16262.1-2025, GB/T 16262.2-2025, GB/T 16262.3-2025 and GB/T 16262.4-2025 (Abstract
Syntax Notation One or ASN.1) together specifies the notation for abstract syntax. This document defines the encoding of type values defined using ASN.1 notation.
The application of these encoding rules produces the transfer syntax for these values, and also applies to decoding.
This document defines three sets of encoding rules, namely basic encoding rules, regular encoding rules and atypical encoding rules.
In the code, the basic encoding rules give various choices for how the encoder transmitter encodes the data value, while the regular encoding rules and the atypical encoding rules
Then only one encoding is selected from those allowed by the basic encoding rules, excluding all options for the sender.
The set of restrictions that atypical encoding rules impose on basic encoding rules is different from each other.
Appendix A gives examples of applying basic coding rules.
Appendix B summarizes the assignment of Object Identifier and OID International Resource Identifier values generated in this document.
Appendix C gives examples of applying the basic encoding rules to encoded real numbers.
GB/T 16263 is planned to consist of 8 parts.
--- Part 1.Basic Encoding Rules (BER), Regular Encoding Rules (CER) and Untypical Encoding Rules (DER) specifications.
To specify a set of basic encoding rules.
--- Part 2.Specification of the compressed encoding rules (PER). The purpose is to specify a set of compressed encoding rules.
--- Part 3.Encoding Control Notation (ECN) Specification. The purpose is to standardize the ASN.1 Encoding Control Notation.
--- Part 4.XML Encoding Rules (XER). The purpose is to specify the Basic XML Encoding Rules (BASIC-XER), regular
XML Encoding Rules Set (CXER) and Extended XML Encoding Rules Set (EXTENDED-XER).
--- Part 5.Mapping of W3C XML Schema Definitions to ASN.1.The purpose is to define the mapping from any XSD schema to ASN.1
There are two versions of the mapping mode.
--- Part 6.Registration and application of PER coded instructions. The purpose is to specify the PER coded instruction format, mechanism, registration agency
Methods of operation, PER and ASN.1 related.
--- Part 7.Octet Encoding Rules (OER) Specification. The purpose is to provide constraints for the Basic Octet Encoding Rules and
Generates a unique encoding for any given ASN.1 value.
--- Part 8.JavaScript Object Notation Encoding Rules (JER) specification. The purpose is to specify a set of JavaScript objects
Representation encoding rules for applications that interoperate with JSON.
Information technology ASN.1 encoding rules
Part 1.Basic Encoding Rules (BER),
Regular Encoding Rules (CER) and
Degenerate Encoding Rules (DER) Specification
1 Scope
This document specifies a set of basic encoding rules that are also applicable to decoding this transfer syntax and are used to identify the transmitted
This document also specifies regular encoding rules and a set of atypical encoding rules that restrict the encoding of values to the basic encoding rules.
An alternative encoding is provided.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 16262.1-2025 Information technology Abstract syntax notation 1 (ASN.1) Part 1.Basic notation specification (ISO /
IEC 8824-1.2021, IDT)
GB/T 16262.2-2025 Information technology Abstract syntax notation 1 (ASN.1) Part 2.Information object specification (ISO /IEC
8824-2.2021,IDT)
Note. GB/T 2311-2000 Information technology character code structure and extension technology (ISO /IEC 2022.1994, IDT)
Note. GB/T 12054-1989 Registration procedure for data processing escape sequences (ISO 2375.1985, NEQ)
Note. SJ/Z9047-1987 Information processing - Method for representing numerical values in character string form for information exchange (ISO 6093.1985, IDT)
ISO /IEC 7498-1 Information technology Open Systems Interconnection Basic reference model Part 1.Basic model
Note. GB/T 9387.1-1998 Information technology Open Systems Interconnection Basic Reference Model Part 1.Basic Model (ISO /IEC 7498-1.
1994,IDT)
Note. GB/T 13000-2025 Information technology Universal coded character set (UCS) (ISO /IEC 10646.2020, MOD)
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