ISO/IEC 8824-1:2008

Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1:

ISO/IEC 8824-1:2008 specifies a standard notation called Abstract Syntax Notation One (ASN.1) that is used for the definition of data types, values, and constraints on data types. ISO/IEC 8824-1:2008 defines a number of simple types, with their tags, and specifies a notation for referencing these types and for specifying values of these types; defines mechanisms for constructing new types from more basic types, and specifies a notation for defining such types and assigning them tags, and for specifying values of these types; defines character sets (by reference to other ITU-T Recommendations and International Standards) for use within ASN.1. ISO/IEC 8824-1:2008 can be applied whenever it is necessary to define the abstract syntax of information. ISO/IEC 8824-1:2008 is referenced by other standards which define encoding rules for the ASN.1 types.

Technologies de l'information — Notation de syntaxe abstraite numéro un (ASN.1): Spécification de la notation de base — Partie 1:

General Information

• Status: Withdrawn
• Publication Date: 14-Dec-2008
• Withdrawal Date: 14-Dec-2008
• ICS: 35.100.60 - Presentation layer
• Technical Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Drafting Committee: ISO/IEC JTC 1/SC 6 - Telecommunications and information exchange between systems
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 12-Nov-2015

Relations

• Revised: ISO/IEC 8824-1:2015 - Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1:
• Effective Date: 05-Nov-2015
• Revises: ISO/IEC 8824-1:2002 - Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1:
• Effective Date: 17-Mar-2009
• Revises: ISO/IEC 8824-1:2002/Amd 2:2005 - Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1: — Amendment 2: Alignment with changes made to ITU-T Rec. X.660 | ISO/IEC 9834-1 for identifiers in object identifier value notation
• Effective Date: 17-Mar-2009
• Revises: ISO/IEC 8824-1:2002/Amd 1:2004 - Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1: — Amendment 1: Support for EXTENDED-XER
• Effective Date: 17-Mar-2009
• Revises: ISO/IEC 8824-1:2002/Amd 4:2008 - Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1: — Amendment 4: PER encoding instructions
• Effective Date: 17-Mar-2009
• Revises: ISO/IEC 8824-1:2002/Amd 3:2006 - Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation — Part 1: — Amendment 3: Time type support
• Effective Date: 17-Mar-2009

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 8824-1
Fourth edition
2008-12-15


Information technology — Abstract
Syntax Notation One (ASN.1):
Specification of basic notation
Technologies de l'information — Notation de syntaxe abstraite numéro
un (ASN.1): Spécification de la notation de base




Reference number
ISO/IEC 8824-1:2008(E)
©
ISO/IEC 2008

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ISO/IEC 8824-1:2008(E)
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ISO/IEC 8824-1:2008(E)
CONTENTS
Page
Foreword .viii
Introduction.ix
1 Scope. 1
2 Normative references . 1
2.1 Identical Recommendations | International Standards . 1
2.2 Additional references . 2
3 Definitions. 2
3.1 International Object Identifier tree specification .2
3.2 Information object specification . 2
3.3 Constraint specification. 3
3.4 Parameterization of ASN.1 specification . 3
3.5 Structure for identification of organizations . 3
3.6 Universal Multiple-Octet Coded Character Set (UCS) . 3
3.7 Representation of dates and times. 3
3.8 Additional definitions . 4
4 Abbreviations . 9
5 Notation. 10
5.1 General. 10
5.2 Productions . 10
5.3 The alternative collections . 10
5.4 Non-spacing indicator. 10
5.5 Example of a production . 10
5.6 Layout . 11
5.7 Recursion . 11
5.8 References to permitted sequences of lexical items. 11
5.9 References to a lexical item . 11
5.10 Short-hand notations . 11
5.11 Value references and the typing of values . 12
6 The ASN.1 model of type extension . 12
7 Extensibility requirements on encoding rules . 13
8 Tags. 13
9 Encoding instructions. 14
10 Use of the ASN.1 notation . 15
11 The ASN.1 character set. 15
12 ASN.1 lexical items. 17
12.1 General rules . 17
12.2 Type references. 17
12.3 Identifiers . 17
12.4 Value references. 18
12.5 Module references. 18
12.6 Comments . 18
12.7 Empty lexical item . 18
12.8 Numbers. 18
12.9 Real numbers. 18
12.10 Binary strings . 19
12.11 XML binary string item . 19
12.12 Hexadecimal strings. 19
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12.13 XML hexadecimal string item. 19

12.14 Character strings . 19
12.15 XML character string item. 20
12.16 The simple character string lexical item. 22
12.17 Time value character strings . 22
12.18 XML time value character string item .22
12.19 The property and setting names lexical item. 22
12.20 Assignment lexical item. 22
12.21 Range separator. 22
12.22 Ellipsis. 23
12.23 Left version brackets. 23
12.24 Right version brackets. 23
12.25 Encoding references. 23
12.26 Integer-valued Unicode labels. 23
12.27 Non-integer Unicode labels . 23
12.28 XML end tag start item . 23
12.29 XML single tag end item. 24
12.30 XML boolean true item. 24
12.31 XML boolean extended-true item . 24
12.32 XML boolean false item. 24
12.33 XML boolean extended-false item. 24
12.34 XML real not-a-number item . 24
12.35 XML real infinity item. 25
12.36 XML tag names for ASN.1 types. 25
12.37 Single character lexical items. 26
12.38 Reserved words. 27
13 Module definition. 27
14 Referencing type and value definitions . 31
15 Notation to support references to ASN.1 components . 33
16 Assigning types and values . 34
17 Definition of types and values. 35
18 Notation for the boolean type. 38
19 Notation for the integer type . 39
20 Notation for the enumerated type. 40
21 Notation for the real type. 41
22 Notation for the bitstring type . 42
23 Notation for the octetstring type. 44
24 Notation for the null type . 45
25 Notation for sequence types . 45
26 Notation for sequence-of types. 48
27 Notation for set types . 51
28 Notation for set-of types. 52
29 Notation for choice types . 52
30 Notation for selection types. 54
31 Notation for prefixed types . 55
31.1 General. 55
31.2 The tagged type. 55
31.3 The encoding prefixed type. 56
32 Notation for the object identifier type . 57
33 Notation for the relative object identifier type . 58
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ISO/IEC 8824-1:2008(E)
34 Notation for the OID internationalized resource identifier type.60

35 Notation for the relative OID internationalized resource identifier type. 60
36 Notation for the embedded-pdv type. 61
37 Notation for the external type. 63
38 The time type. 64
38.1 General. 64
38.2 Time properties and settings of time abstract values . 64
38.3 Basic value notation and XML value notation for time abstract values with specified property
settings . 68
38.4 Useful time types. 72
39 The character string types. 74
40 Notation for character string types . 74
41 Definition of restricted character string types . 75
42 Naming characters, collections and property category sets. 79
43 Canonical order of characters. 82
44 Definition of unrestricted character string types . 83
45 Notation for types defined in clauses 46 to 48 . 84
46 Generalized time. 84
47 Universal time . 86
48 The object descriptor type . 86
49 Constrained types . 87
50 Element set specification. 88
51 Subtype elements. 90
51.1 General. 90
51.2 Single value. 92
51.3 Contained subtype. 92
51.4 Value range . 92
51.5 Size constraint. 92
51.6 Type constraint. 93
51.7 Permitted alphabet. 93
51.8 Inner subtyping . 93
51.9 Pattern constraint. 95
51.10 Property settings. 95
51.11 Duration range . 96
51.12 Time point range . 96
51.13 Recurrence range. 97
52 The extension marker . 97
53 The exception identifier. 99
54 Encoding control sections . 99
Annex A ASN.1 regular expressions. 101
A.1 Definition . 101
A.2 Metacharacters . 101
Annex B The defined time types . 105
B.1 General. 105
B.2 The ASN.1 defined time types module . 105
Annex C Rules for type and value Compatibility. 110
C.1 The need for the value mapping concept (tutorial introduction). 110
C.2 Value mappings. 112
C.3 Identical type definitions. 113
C.4 Specification of value mappings . 115
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C.5 Additional value mappings defined for the character string types. 115
C.6 Specific type and value compatibility requirements . 116

C.7 Examples. 117
Annex D Assigned object identifier and OID internationalized resource identifier values. 119
D.1 Values assigned in this Recommendation | International Standard. 119
D.2 Object identifiers in the ASN.1 and encoding rules standards. 119
Annex E Encoding references . 121
Annex F Assignment and use of arcs in the International Object Identifier tree. 122
F.1 General. 122
F.2 Use of the International Object Identifier tree by the object identifier (OBJECT IDENTIFIER)
type . 122
F.3 Use of the International Object Identifier tree by the OID internationalized resource identifier
(OID-IRI) type .122
Annex G Examples and hints . 123
G.1 Example of a personnel record. 123
G.1.1 Informal description of Personnel Record . 123
G.1.2 ASN.1 description of the record structure. 123
G.1.3 ASN.1 description of a record value. 124
G.2 Guidelines for use of the notation . 124
G.2.1 Boolean . 125
G.2.2 Integer . 125
G.2.3 Enumerated . 125
G.2.4 Real . 126
G.2.5 Bit string. 127
G.2.6 Octet string. 128
G.2.7 UniversalString, BMPString and UTF8String . 129
G.2.8 CHARACTER STRING . 129
G.2.9 Null . 130
G.2.10 Sequence and sequence-of . 130
G.2.11 Set and set-of. 132
G.2.12 Tagged.134
G.2.13 Choice . 135
G.2.14 Selection type. 137
G.2.16 Embedded-pdv . 138
G.2.17 External . 138
G.2.18 Instance-of. 138
G.2.19 Object identifier . 139
G.2.20 OID internationalized resource identifier. 139
G.2.21 Relative object identifier. 139
G.3 Value notation and property settings (TIME type and useful time types). 140
G.3.1 Date.
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