### This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

### This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

# ISO/IEC 8824-1

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

active, Most Current
 Organization: ISO Publication Date: 15 November 2015 Status: active Page Count: 198 ICS Code (Presentation layer): 35.100.60
##### scope:

This Recommendation | International Standard provides 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.

This Recommendation | International Standard:

- 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 Recommendations and/or International Standards) for use within

ASN.1. The ASN.1 notation can be applied whenever it is necessary to define the abstract syntax of information.

The ASN.1 notation is referenced by other standards which define encoding rules for the ASN.1 types.

### Document History

June 1, 2021
Information technology — Abstract Syntax Notation One (ASN.1) — Part 1: Specification of basic notation
This Recommendation | International Standard provides a standard notation called Abstract Syntax Notation One (ASN.1) that is used for the definition of data types, values, and constraints on data...
March 1, 2019
Information technology — Abstract Syntax Notation One (ASN.1): Specification of basic notation AMENDMENT 1: Relaxing imports clause to allow importation of definitions from new versions of a given module
A description is not available for this item.
October 1, 2018
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation Part 1: TECHNICAL CORRIGENDUM 3
A description is not available for this item.
September 1, 2018
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation Part 1: TECHNICAL CORRIGENDUM 2
A description is not available for this item.
September 1, 2017
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation Part 1: Technical TECHNICAL CORRIGENDUM 1
A description is not available for this item.
ISO/IEC 8824-1
November 15, 2015
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation
This Recommendation | International Standard provides a standard notation called Abstract Syntax Notation One (ASN.1) that is used for the definition of data types, values, and constraints on data...
September 15, 2014
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation TECHNICAL CORRIGENDUM 2
A description is not available for this item.
December 1, 2012
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation TECHNICAL CORRIGENDUM 1
A description is not available for this item.
December 15, 2008
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation
This Recommendation | International Standard provides a standard notation called Abstract Syntax Notation One (ASN.1) that is used for the definition of data types, values, and constraints on data...
July 1, 2008
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation AMENDMENT 4: PER encoding instructions
A description is not available for this item.
December 15, 2006
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation AMENDMENT 3: Time type support
A description is not available for this item.
February 15, 2006
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation
A description is not available for this item.
July 15, 2005
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation AMENDMENT 2: Alignment with changes made to ITU-T Rec. X.660 ISO/IEC 9834-1 for identifiers in object identifier value notation
A description is not available for this item.
October 1, 2004
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation AMENDMENT 1: Support for EXTENDED-XER
A description is not available for this item.
December 15, 2002
Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation
A description is not available for this item.
May 1, 2002
Information Technology - Abstract Syntax Notation One (ASN.1): Specification of Basic Notation
A description is not available for this item.
February 1, 2002
Information Technology - Abstract Syntax Notation One (ASN.1): Specification of Basic Notation
A description is not available for this item.
December 1, 2000
Information Technology - Abstract Syntax Notation One (ASN.1): Specification of Basic Notation AMENDMENT 1: Relation object identifiers
A description is not available for this item.
December 15, 1999
Information Technology - Abstract Syntax Notation One (ASN.1): Specification of Basic Notation
A description is not available for this item.
October 15, 1995
Information Technology - Abstract Syntax Notation One (ASN.1): Specification of Basic Notation
A description is not available for this item.