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BS ISO/IEC 8825-8:2021

BS ISO/IEC 8825-8:2021

$167.15

Information technology. ASN.1 encoding rules – Specification of JavaScript Object Notation Encoding Rules (JER)

Published By Publication Date Number of Pages
BSI 2021 42
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This Recommendation | International Standard specifies a set of JavaScript Object Notation Encoding Rules (JER) that may be used to derive a transfer syntax for values of types defined in Rec. ITU-T X.680 | ISO/IEC 8824-1, Rec. ITU-T X.681 | ISO/IEC 8824-2, Rec. ITU-T X.682 | ISO/IEC 8824-3 and Rec. ITU-T X.683 | ISO/IEC 8824-4. It is implicit in the specification of these encoding rules that they are also to be used for decoding.

The encoding rules specified in this Recommendation | International Standard:

  • are used at the time of communication;

  • are intended for use in circumstances where interoperability with applications using JSON is the major concern in the choice of encoding rules;

  • allow the extension of an abstract syntax by addition of extra values for all forms of extensibility described in Rec. ITU-T X.680 | ISO/IEC 8824-1.

This Recommendation | International Standard also specifies the syntax and semantics of JER encoding instructions, as well as the rules for their assignment and combination. JER encoding instructions can be used to control JER encoding for specific Abstract Syntax Notation One (ASN.1) types.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 Blank Page
7 CONTENTS
11 1 Scope
2 Normative references
2.1 Identical Recommendations | International Standards
2.2 Additional references
12 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 (BER)
3.6 Packed Encoding Rules (PER)
3.7 Additional definitions
13 4 Abbreviations
5 Encodings specified by this Recommendation | International Standard
14 6 Conformance
7 General provisions
7.1 Use of the type notation
15 7.2 Constraints
16 7.3 Type and value model used for encoding
7.4 Types to be encoded
7.5 Encoding instructions
17 7.6 Production of a complete JER encoding
8 Notation, lexical items and keywords used in JER encoding instructions
18 9 Specifying JER encoding instructions
19 10 Assigning a JER encoding instruction using a type prefix
11 Assigning a JER encoding instruction using a JER encoding control section
12 Identification of the targets for a JER encoding instruction
12.1 General rules
20 12.2 Types defined in the module
12.3 Built-in types
12.4 Types imported from another module
13 Multiple assignment of JER encoding instructions
13.1 Order in which multiple assignments are considered
21 13.2 Effect of assigning a negating encoding instruction
13.3 Multiple assignment of JER encoding instructions of the same category
14 The ARRAY encoding instruction
14.1 General
14.2 Restrictions
15 The BASE64 encoding instruction
15.1 General
22 15.2 Restrictions
16 The NAME encoding instruction
16.1 General
23 16.2 Restrictions
17 The OBJECT encoding instruction
17.1 General
17.2 Restrictions
18 The TEXT encoding instruction
18.1 General
24 18.2 Restrictions
19 The UNWRAPPED encoding instruction
19.1 General
19.2 Restrictions
20 Encoding of boolean values
25 21 Encoding of integer values
22 Encoding of enumerated values
23 Encoding of real values
23.1 General
23.2 Encoding of the special real values
26 23.3 Encoding as a JSON number
23.4 Encoding as a JSON object
24 Encoding of bitstring values
24.1 General
24.2 Encoding of bitstring types with a fixed size
24.3 Encoding of bitstring types with a variable size
24.4 Alternative encoding of bitstring types with a JER-visible contents constraint
27 25 Encoding of octetstring values
25.1 General
25.2 Encoding of an octetstring value as a JSON string containing a Base64 encoding
25.3 Encoding of an octetstring value as a JSON string containing a hexadecimal encoding
25.4 Alternative encoding of an octetstring type with a JER-visible contents constraint
26 Encoding of the null value
27 Encoding of sequence values
27.1 General
27.2 Array-based encoding
27.3 Object-based encoding
28 28 Encoding of sequence-of values
29 Encoding of set values
30 Encoding of set-of values
30.1 General
30.2 Array-based encoding
30.3 Object-based encoding
29 31 Encoding of choice values
31.1 General
31.2 Unwrapped encoding
31.3 Wrapped encoding
32 Encoding of object identifier values
33 Encoding of relative object identifier values
34 Encoding of values of the internationalized resource reference type
35 Encoding of values of the relative internationalized resource reference type
36 Encoding of values of the embedded-pdv type
30 37 Encoding of values of the external type
38 Encoding of values of the restricted character string types
39 Encoding of values of the unrestricted character string type
40 Encoding of values of the time types
41 Encoding of open type values
42 Object identifier values referencing the encoding rules
31 Annex A Examples of JER encodings
A.1 ASN.1 description of the record structure
A.2 ASN.1 description of a record value
A.3 Example JER representation of this record value
32 A.4 Additional examples of JER encodings
35 Annex B Examples of JER encoding instructions and their effect on the encodings
B.1 ASN.1 description of the record structure
B.2 ASN.1 description of a record value
36 B.3 JER representation of this record value
B.4 Additional examples of JER encodings
38 B.5 Examples of JER encodings of choice types

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BS ISO/IEC 8825-8:2021
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