ISO/IEC 8825-2:2008
Information technology — ASN.1 encoding rules: Specification of Packed Encoding Rules (PER) — Part 2:
ISO/IEC 8825-2:2008 specifies a set of Packed Encoding Rules that can be used to derive a transfer syntax for values of types defined in ISO/IEC 8824-1. These Packed Encoding Rules can also be applied for decoding such a transfer syntax in order to identify the data values being transferred. The encoding rules specified in ISO/IEC 8825-2:2008:
- are used at the time of communication;
- are intended for use in circumstances where minimizing the size of the representation of values is the major concern in the choice of encoding rules;
- allow the extension of an abstract syntax by addition of extra values, preserving the encodings of the existing values, for all forms of extension described in ISO/IEC 8824-1;
- can be modified in accordance with the provisions of ISO/IEC 8825-6.
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CONTENTS
FOREWORD
Introduction
1 Scope
2 Normative references
2.1 Identical Recommendations | International Standards
2.2 Additional references
3 Definitions
3.1 Specification of Basic Notation
3.2 Information Object Specification
3.3 Constraint Specification
3.4 Parameterization of ASN.1 Specification
3.5 Basic Encoding Rules
3.6 PER Encoding Instructions
3.7 Additional definitions
4 Abbreviations
5 Notation
6 Convention
7 Encoding rules defined in this Recommendation | International Standard
8 Conformance
9 PER encoding instructions
10 The approach to encoding used for PER
10.1 Use of the type notation
10.2 Use of tags to provide a canonical order
10.3 PER-visible constraints
10.4 Type and value model used for encoding
10.5 Structure of an encoding
10.6 Types to be encoded
11 Encoding procedures
11.1 Production of the complete encoding
11.2 Open type fields
11.3 Encoding as a non-negative-binary-integer
11.4 Encoding as a 2's-complement-binary-integer
11.5 Encoding of a constrained whole number
11.6 Encoding of a normally small non-negative whole number
11.7 Encoding of a semi-constrained whole number
11.8 Encoding of an unconstrained whole number
11.9 General rules for encoding a length determinant
12 Encoding the boolean type
13 Encoding the integer type
14 Encoding the enumerated type
15 Encoding the real type
16 Encoding the bitstring type
17 Encoding the octetstring type
18 Encoding the null type
19 Encoding the sequence type
20 Encoding the sequence-of type
21 Encoding the set type
22 Encoding the set-of type
23 Encoding the choice type
24 Encoding the object identifier type
25 Encoding the relative object identifier type
26 Encoding the internationalized resource reference type
27 Encoding the relative internationalized resource reference type
28 Encoding the embedded-pdv type
29 Encoding of a value of the external type
30 Encoding the restricted character string types
31 Encoding the unrestricted character string type
32 Encoding the time type, the useful time types, the defined time types and the
33 Object identifiers for transfer syntaxes
Annex A
Example of encodings
A.1 Record that does not use subtype constraints
A.2 Record that uses subtype constraints
A.3 Record that uses extension markers
A.4 Record that uses extension addition groups
Annex B
Combining PER-visible and non-PER-visible constraints
B.1 General
B.2 Extensibility and visibility of constraints in PER
B.3 Examples
Annex C
Support for the PER algorithms
Annex D
Support for the ASN.1 rules of extensibility
Annex E
Tutorial annex on concatenation of PER encodings
Annex F
Identification of encoding rules
Series X Data networks, open system communications and security
Amendments
- ISO/IEC 8825-2:2008/Cor 1:2012. Published 03/12/2012
- ISO/IEC 8825-2:2008/Cor 2:2012. Published 07/09/2012
- ISO/IEC 8825-2:2008/Cor 3:2015. Published 06/05/2015
- ISO/IEC 8825-2:2008/Cor 4:2015. Published 06/05/2015
- ISO/IEC 8825-2:2008/COR1:2012. Published 03/12/2012
- ISO/IEC 8825-2:2008/COR2:2012. Published 07/09/2012
- ISO/IEC 8825-2:2008/COR3:2015. Published 15/05/2015
- ISO/IEC 8825-2:2008/COR4:2015. Published 15/05/2015
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CONTENTS
FOREWORD
Introduction
1 Scope
2 Normative references
2.1 Identical Recommendations | International Standards
2.2 Additional references
3 Definitions
3.1 Specification of Basic Notation
3.2 Information Object Specification
3.3 Constraint Specification
3.4 Parameterization of ASN.1 Specification
3.5 Basic Encoding Rules
3.6 PER Encoding Instructions
3.7 Additional definitions
4 Abbreviations
5 Notation
6 Convention
7 Encoding rules defined in this Recommendation | International Standard
8 Conformance
9 PER encoding instructions
10 The approach to encoding used for PER
10.1 Use of the type notation
10.2 Use of tags to provide a canonical order
10.3 PER-visible constraints
10.4 Type and value model used for encoding
10.5 Structure of an encoding
10.6 Types to be encoded
11 Encoding procedures
11.1 Production of the complete encoding
11.2 Open type fields
11.3 Encoding as a non-negative-binary-integer
11.4 Encoding as a 2's-complement-binary-integer
11.5 Encoding of a constrained whole number
11.6 Encoding of a normally small non-negative whole number
11.7 Encoding of a semi-constrained whole number
11.8 Encoding of an unconstrained whole number
11.9 General rules for encoding a length determinant
12 Encoding the boolean type
13 Encoding the integer type
14 Encoding the enumerated type
15 Encoding the real type
16 Encoding the bitstring type
17 Encoding the octetstring type
18 Encoding the null type
19 Encoding the sequence type
20 Encoding the sequence-of type
21 Encoding the set type
22 Encoding the set-of type
23 Encoding the choice type
24 Encoding the object identifier type
25 Encoding the relative object identifier type
26 Encoding the internationalized resource reference type
27 Encoding the relative internationalized resource reference type
28 Encoding the embedded-pdv type
29 Encoding of a value of the external type
30 Encoding the restricted character string types
31 Encoding the unrestricted character string type
32 Encoding the time type, the useful time types, the defined time types and the
33 Object identifiers for transfer syntaxes
Annex A
Example of encodings
A.1 Record that does not use subtype constraints
A.2 Record that uses subtype constraints
A.3 Record that uses extension markers
A.4 Record that uses extension addition groups
Annex B
Combining PER-visible and non-PER-visible constraints
B.1 General
B.2 Extensibility and visibility of constraints in PER
B.3 Examples
Annex C
Support for the PER algorithms
Annex D
Support for the ASN.1 rules of extensibility
Annex E
Tutorial annex on concatenation of PER encodings
Annex F
Identification of encoding rules
Series X Data networks, open system communications and security
Amendments
- ISO/IEC 8825-2:2008/Cor 1:2012. Published 03/12/2012
- ISO/IEC 8825-2:2008/Cor 2:2012. Published 07/09/2012
- ISO/IEC 8825-2:2008/Cor 3:2015. Published 06/05/2015
- ISO/IEC 8825-2:2008/Cor 4:2015. Published 06/05/2015
- ISO/IEC 8825-2:2008/COR1:2012. Published 03/12/2012
- ISO/IEC 8825-2:2008/COR2:2012. Published 07/09/2012
- ISO/IEC 8825-2:2008/COR3:2015. Published 15/05/2015
- ISO/IEC 8825-2:2008/COR4:2015. Published 15/05/2015