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GB/T 16263.2-2025Information technology - ASN.1 encoding rules - Part 2: Specification of Packed Encoding Rules (PER) (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

May 30, 2025

Implementation date

December 1, 2025

Scope

GB/T 16263.2-2025 (Information technology - ASN.1 encoding rules - Part 2: Specification of Packed Encoding Rules (PER)) is available as an English-translated PDF.

GB/T 16263.2-2025 — This document specifies a set of compact encoding rules that can be used to derive transmission codes for type values defined in GB/T 16262.1-2025.

These packed encoding rules also apply to decoding such transfer syntaxes in order to identify the data values being transferred.

The encoding rules specified in this document are. ---Used during communication; --- When choosing encoding rules, minimize the size of the value representation as the main consideration; --- For all extended forms described in GB/T 16262.1-2025, it is allowed to increase the value while retaining the encoding of the existing value.

External values extend the abstract syntax; ---Can be modified according to ISO/IEC 8825-6:2021.

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Document preview — GB/T 16263.2-2025

National Standard of the People's Republic of China

ICS: 35.110
Classification: L 79
Replacing: GB/T 16263.2-2006

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
3.1 Basic notation specification
3.2 Information Object Specification
3.3 Constraint Specification
3.4 Parameterization of the ASN.1 specification
3.5 Basic Coding Rules
3.6 PER Encoded Instruction
3.7 Additional Definitions
4 Abbreviations
5 Notation
6 Agreement
7 Encoding rules defined in this document
8 Compliance
9 PER coded instruction
10 Encoding method used by PER
10.1 Use of type notation
10.2 Using Labels to Provide Regular Order
10.3 PER Visibility Constraints
10.4 Encoding the type and value model
10.5 Encoding Structure
10.6 Encoded Type
11 Coding Process 11
11.1 Production of the complete code
11.2 Open Type Fields
11.3 Encoding of non-negative binary integers
11.4 Encoding of Two's Complement Binary Integers
11.5 Encoding of restricted integers
11.6 Encoding of Normal Small Non-Negative Integers
11.7 Encoding of Semirestricted Integers
11.8 Encoding of Unrestricted Integers
11.9 General Rules for Encoding Length Determinants
12 Encoding of Boolean Types
13 Encoding of integer types
14 Encoding of enumeration types
15 Encoding of real number types
16-bit string type encoding
17 Encoding of octet string type
18 Encoding of null value types
19 Encoding of sequence types
20 Encoding of a single sequence type
21 Encoding of collection types
22 Encoding of a single collection type
23 Select the type of code
24 Encoding of object identifier type
25 Encoding of the associated object identifier type
26 Encoding of internationalized resource reference types
27 Encoding of relevant internationalized resource reference types
28 Embedded pdv type encoding
29 Encoding of external type values
30 Encoding of restricted string types
31 Unrestricted string type encoding
32 Coding of time types, valid time types, defined time types, and additional time types
33 Object Identifier of Transfer Syntax
Appendix A (Informative) Coding Example
A.1 Records without subtype constraints
A.2 Records using subtype constraints
A.3 Records using extension tags
A.4 Records using extended additional groups
Appendix B (Informative) Combining PER Visible Constraints and PER Non-Visible Constraints
B.1 Overview
B.2 Scalability and visibility of constraints in PER
B.3 Example
Appendix C (Informative) Support for the PER algorithm
Appendix D (Informative) Support for Extensible ASN.1 Rules
Appendix E (Informative) Guidance on PER Code Splicing Appendix
Appendix F (Informative) Identification of Coding Rules
References

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 2 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 16263.2-2006 "Information Technology ASN.1 Coding Rules" and is consistent with GB/T 16263.2-2006.

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

--- Increased the scope of application of the tightened coding rules (see Chapter 1);

--- Added the definition of PER encoding instruction (see 3.6);

--- Changed the content of non-negative binary integer encoding (see 3.7.20, 3.6.20 of the 2006 edition);

--- Added PER encoding instruction (see Chapter 9);

--- Changed the way the complete code is generated during the encoding process (see 11.1, 10.1 of the 2006 edition);

--- Changed the encoding rules of bit string types (see 16.6, 15.6 of the 2006 edition);

--- Changed the encoding rules of octet string types (see 17.3, 16.3 of the 2006 edition);

---Added encoding of internationalized resource reference types (see Chapter 26);

---Added the encoding of relevant international resource reference types (see Chapter 27);

--- Changed the encoding rules for restricted string types (see 30.4, 30.6.1, 30.6.3, 27.4, 27.6.1, 27.6.3 of the 2006 edition);

---Added the encoding of time types, valid time types, defined time types and additional time types (see Chapter 32);

--- Changed the expression of the encoding rules of the object identifier of the transfer syntax (see 33.2, Chapter 29 of the 2006 edition);

--- Changed the title of Appendix F and the text of the text (see Appendix F, Appendix F of the 2006 edition).

This document is equivalent to ISO/IEC 8825-2:2021 "Information technology ASN.1 encoding rules Part 2: Condensed encoding rules" (PER) Specification.

Introduction

GB/T 16262.1-2025, GB/T 16262.2-2025, GB/T 16262.3-2025 and GB/T 16262.4-2025 Describes Abstract Syntax Notation One (ASN.1), which defines messages exchanged between peer applications.

The encoding rules defined in this document apply to type values determined using the notation specified in GB/T 16262.1-2025.

The encoding rules generate the transfer syntax for these values. These encoding rule specifications also implicitly apply to decoding.

There are multiple sets of encoding rules for ASN.1 type values. This document defines the Permitted Encoding Rules (PER).

It is a set of condensed coding rules because this set of coding rules is more comprehensive than the basic coding rules described in GB/T 16263.1-2025.

(BER) and its derived encoding rules are more compact. GB/T 16263.1-2025 is a compact encoding rule specification for some parts.

refer to.

GB/T 16263 is planned to consist of eight 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 2: Specification of the Reduced Encoding Rules (PER)

1 Scope

This document specifies a set of compact encoding rules that can be used to derive transmission codes for type values defined in GB/T 16262.1-2025.

These packed encoding rules also apply to decoding such transfer syntaxes in order to identify the data values being transferred.

The encoding rules specified in this document are.

---Used during communication;

--- When choosing encoding rules, minimize the size of the value representation as the main consideration;

--- For all extended forms described in GB/T 16262.1-2025, it is allowed to increase the value while retaining the encoding of the existing value.

External values extend the abstract syntax;

---Can be modified according to ISO/IEC 8825-6:2021.

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) GB/T 16262.3-2025 Information technology Abstract syntax notation 1 (ASN.1) Part 3: Constraint specification (ISO/IEC 8824-3:2021,IDT) GB/T 16262.4-2025 Information technology Abstract Syntax Notation One (ASN.1) Part 4: Parameterization of ASN.1 specifications (ISO/IEC 8824-4:2021, IDT) GB/T 16263.1-2025 Information technology ASN.1 encoding rules Part 1: Basic encoding rules (BER), regular encoding Specification of the Common Encoding Rules (CER) and the Untypical Encoding Rules (DER) (ISO/IEC 8825-1:2021, IDT) ISO/IEC 8825-6:2021 Information technology ASN.1 encoding rules Part 6: Registration and application of PER encoding instructions structures)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Basic Notation Standards

The terms and definitions defined in GB/T 16262.1-2025 apply to this document.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 77 pages — is available in the English PDF.

Referenced standards

Normative references

ISO/IEC 8824 · ISO/IEC 8825

Cited by

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