Introduction
1 Scope
2 Normative references
2.1 Identical Recommendations | International
Standards
2.2 Additional references
3 Definitions
3.1 ASN.1 definitions
3.2 ECN‑specific definitions
4 Abbreviations
5 Definition of ECN syntax
6 Encoding conventions and notation
7 The ECN character set
8 ECN lexical items
8.1 Encoding object references
8.2 Encoding object set references
8.3 Encoding class references
8.4 Reserved word items
8.5 Reserved encoding class name items
8.6 Non-ECN item
9 ECN Concepts
9.1 Encoding Control Notation (ECN)
specifications
9.2 Encoding classes
9.3 Encoding structures
9.4 Encoding objects
9.5 Encoding object sets
9.6 Defining new encoding classes
9.7
Defining
encoding objects
9.8 Differential encoding-decoding
9.9 Encoders options in encodings
9.10 Properties of encoding objects
9.11 Parameterization
9.12 Governors
9.13
General
aspects of encodings
9.14 Identification of information elements
9.15 Reference fields and determinants
9.16 Replacement classes and structures
9.17 Mapping abstract values onto fields of encoding
structures
9.18 Transforms and transform composites
9.19 Contents of Encoding Definition Modules
9.20 Contents of the Encoding Link Module
9.21 Defining encodings for primitive encoding
classes
9.22 Application of encodings
9.23 Combined encoding object set
9.24 Application point
9.25 Conditional encodings
9.26 Changes to ASN.1 Recommendations |
International Standards
10
Identifying encoding classes, encoding
objects, and encoding object sets
11 Encoding
ASN.1 types
11.1 General
11.2 Built‑in encoding classes used for
implicitly generated encoding structures
11.3 Simplification and expansion of ASN.1
notation for encoding purposes
11.4 The implicitly generated encoding structure
12 The Encoding
Link Module (ELM)
12.1 Structure of the ELM
12.2 Encoding types
13 Application
of encodings
13.1 General
13.2 The combined encoding object set and its
application
14 The Encoding
Definition Module (EDM)
15 The renames
clause
15.1 Explicitly generated and exported structures
15.2 Name changes
15.3 Specifying the region for name changes
16 Encoding
class assignments
16.1 General
16.2 Encoding structure definition
16.3 Alternative encoding structure
16.4 Repetition encoding structure
16.5 Concatenation encoding structure
17 Encoding
object assignments
17.1 General
17.2 Encoding with a defined syntax
17.3 Encoding with encoding object sets
17.4 Encoding using value mappings
17.5 Encoding an encoding structure
17.6 Differential encoding-decoding
17.7 Encoding options
17.8 Non-ECN definition of encoding objects
18 Encoding
object set assignments
18.1 General
18.2 Built‑in encoding object sets
19 Mapping
values
19.1 General
19.2 Mapping by explicit values
19.3 Mapping by matching fields
19.4 Mapping by #TRANSFORM encoding objects
19.5 Mapping by abstract value ordering
19.6 Mapping by value distribution
19.7 Mapping integer values to bits
20 Defining encoding
objects using defined syntax
21 Types used in
defined syntax specification
21.1 The Unit type
21.2 The EncodingSpaceSize type
21.3 The EncodingSpaceDetermination type
21.4 The UnusedBitsDetermination type
21.5 The OptionalityDetermination type
21.6 The AlternativeDetermination type
21.7 The RepetitionSpaceDetermination type
21.8 The Justification type
21.9 The
Padding type
21.10 The Pattern and Non-Null-Pattern types
21.11 The RangeCondition type
21.12 The SizeRangeCondition type
21.13 The ReversalSpecification type
21.14 The ResultSize type
21.15 The HandleValue type
22 Commonly used
encoding property groups
22.1 Replacement specification
22.1.1 Encoding properties, syntax,
and purpose
22.1.2
Specification restrictions
22.1.3 Encoder
actions
22.1.4 Decoder actions
22.2 Pre-alignment and padding specification
22.2.1 Encoding properties, syntax,
and purpose
22.2.2 Specification constraints
22.2.3 Encoder
actions
22.2.4 Decoder actions
22.3 Start pointer specification
22.3.1 Encoding properties, syntax,
and purpose
22.3.2 Specification constraints
22.3.3 Encoder actions
22.3.4 Decoder actions
22.4 Encoding space specification
22.4.1 Encoding properties, syntax,
and purpose
22.4.2 Specification restrictions
22.4.3 Encoder actions
22.4.4 Decoder actions
22.5 Optionality determination
22.5.1 Encoding properties, syntax,
and purpose
22.5.2 Specification restrictions
22.5.3 Encoder actions
22.5.4 Decoder actions
22.6 Alternative determination
22.6.1 Encoding properties, syntax,
and purpose
22.6.2 Specification restrictions
22.6.3 Encoder actions
22.6.4 Decoder actions
22.7 Repetition space specification
22.7.1 Encoding properties, syntax,
and purpose
22.7.2 Specification constraints
22.7.3 Encoder actions
22.7.4 Decoder actions
22.8 Value padding and justification
22.8.1 Encoding properties, syntax,
and purpose
22.8.2 Specification restrictions
22.8.3 Encoder actions
22.8.4 Decoder
actions
22.9 Identification handle specification
22.9.1 Encoding properties, syntax,
and purpose
22.9.2 Specification constraints
22.9.3 Encoders actions
22.9.4 Decoders
actions
22.10 Concatenation specification
22.10.1
Encoding properties, syntax,
and purpose
22.10.2 Specification constraints
22.10.3 Encoder actions
22.10.4 Decoder
actions
22.11 Contained type encoding specification
22.11.1 Encoding properties, syntax,
and purpose
22.11.2 Encoder actions
22.11.3 Decoder actions
22.12 Bit reversal specification
22.12.1 Encoding properties, syntax,
and purpose
22.12.2 Specification constraints
22.12.3 Encoder actions
22.12.4 Decoder actions
23 Defined
syntax specification for bitfield and constructor classes
23.1 Defining encoding objects for classes in the
alternatives category
23.1.1 The defined syntax
23.1.2 Purpose and restrictions
23.1.3 Encoder actions
23.1.4 Decoder actions
23.2 Defining encoding objects for classes in the
bitstring category
23.2.1 The defined syntax
23.2.2 Model for the encoding of classes in the
bitstring category
23.2.3 Purpose and restrictions
23.2.4 Encoder actions
23.2.5 Decoder actions
23.3 Defining encoding objects for classes in the
boolean category
23.3.1 The defined syntax
23.3.2 Purpose and restrictions
23.3.3 Encoder actions
23.3.4 Decoder actions
23.4 Defining encoding objects for classes in the
characterstring category
23.4.1 The defined syntax
23.4.2 Model for the encoding of classes in the
characterstring category
23.4.3 Purpose and restrictions
23.4.4 Encoder
actions
23.4.5 Decoder actions
23.5 Defining encoding objects for classes in the
concatenation category
23.5.1 The defined syntax
23.5.2 Purpose and restrictions
23.5.3 Encoder actions
23.5.4 Decoder actions
23.6 Defining encoding objects for classes in the
integer category
23.6.1 The defined syntax
23.6.2 Purpose and restrictions
23.6.3 Encoder actions
23.6.4 Decoder actions
23.7 Defining encoding objects for the
#CONDITIONAL-INT class
23.7.1 The defined syntax
23.7.2 Purpose and restrictions
23.7.3 Encoder actions
23.7.4 Decoder actions
23.8 Defining encoding objects for classes in the
null category
23.8.1 The defined syntax
23.8.2 Purpose and restrictions
23.8.3 Encoder actions
23.8.4 Decoder actions
23.9 Defining encoding objects for classes in the
octetstring category
23.9.1 The defined syntax
23.9.2 Model for the encoding of classes in the
octetstring category
23.9.3 Purpose and restrictions
23.9.4 Encoder
actions
23.9.5 Decoder actions
23.10 Defining encoding objects for classes in the
optionality category
23.10.1 The defined syntax
23.10.2 Purpose and restrictions
23.10.3 Encoder actions
23.10.4 Decoder actions
23.11 Defining encoding objects for classes in the
pad category
23.11.1 The defined syntax
23.11.2 Purpose and
restrictions
23.11.3 Encoder actions
23.11.4 Decoder actions
23.12 Defining encoding objects for classes in the
repetition category
23.12.1 The defined syntax
23.12.2 Purpose and restrictions
23.12.3 Encoder actions
23.12.4 Decoder actions
23.13 Defining encoding objects for the
#CONDITIONAL-REPETITION class
23.13.1 The defined syntax
23.13.2 Purpose and restrictions
23.13.3 Encoder actions
23.13.4 Decoder actions
23.14 Defining encoding objects for classes in the
tag category
23.14.1 The defined syntax
23.14.2 Purpose and restrictions
23.14.3 Encoder actions
23.14.4 Decoder actions
23.15 Defining encoding objects for classes in the
other categories
24 Defined
syntax specification for the #TRANSFORM encoding class
24.1 Summary of encoding properties and defined
syntax
24.2 Source and target of transforms
24.3 The int-to-int transform
24.4 The bool-to-bool transform
24.5 The bool-to-int transform
24.6 The int-to-bool transform
24.7 The int-to-chars transform
24.8 The int-to-bits transform
24.9 The bits-to-int transform
24.10 The char-to-bits transform
24.11 The bits-to-char transform
24.12 The bit-to-bits transform
24.13 The bits-to-bits transform
24.14 The
chars-to-composite-char transform
24.15 The bits-to-composite-bits transform
24.16 The octets-to-composite-bits transform
24.17 The composite-char-to-chars transform
24.18 The composite-bits-to-bits transform
24.19 The composite-bits-to-octets transform
25 Complete
encodings and the #OUTER class
25.1
Encoding properties, syntax, and purpose for the #OUTER class
25.2 Encoder actions for #OUTER
25.3 Decoder actions for #OUTER
Annex A –
Addendum to ITU‑T Rec. X.680 | ISO/IEC 8824‑1
A.1 Exports and imports clauses
A.2 Addition of "REFERENCE"
A.3 Notation for character string values
Annex
B –Addendum to ITU‑T Rec. X.681 | ISO/IEC 8824‑2
B.1 Definitions
B.2 Additional lexical items
B.3 Addition of "ENCODING‑CLASS"
B.4 FieldSpec additions
B.5 Fixed-type ordered value list field spec
B.6 Fixed-class encoding object field spec
B.7 Variable-class encoding object field spec
B.8 Fixed-class encoding object set field spec
B.9 Fixed-class ordered encoding object list
field spec
B.10 Encoding class field spec
B.11 Ordered value list notation
B.12 Ordered encoding object list notation
B.13 Primitive field names
B.14 Additional reserved words
B.15 Definition of encoding objects
B.16 Additions to "Setting"
B.17 Encoding class field type
Annex C –
Addendum to ITU‑T Rec. X.683 | ISO/IEC 8824‑4
Annex C –
Addendum to ITU‑T Rec. X.683 | ISO/IEC 8824‑4
C.1 Parameterized assignments
C.2 Parameterized encoding assignments
C.3 Referencing parameterized definitions
C.4 Actual parameter list
Annex
D – Examples
D.1 General examples
D.2 Specialization examples
D.3 Explicitly generated structure examples
D.4 A more-bit encoding example
D.5 Legacy protocol specified with tabular
notation
Annex
E – Support for Huffman encodings
Annex
F – Additional information on the Encoding
Control Notation (ECN)
Annex
G – Summary of the ECN notation