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What (who) is Abstract Syntax Notation 1 - definition

INTERFACE DESCRIPTION LANGUAGE FOR DEFINING DATA STRUCTURES THAT CAN BE SERIALIZED AND DESERIALIZED IN A STANDARD, CROSS-PLATFORM WAY

Abstract Syntax Notation One; X.208; X.680; Packed Encoding Rules; ASN1; Abstract Syntax Notation 1; Abstract Syntax Notation; Abstract syntax notation; Abstract syntax notation one; Packed encoding rules; XML Encoding Rules; XML encoding rules; Xml encoding rules; Xml Encoding Rules; Xer encoding rules; XER encoding rules; XER Encoding Rules; Xer Encoding Rules; Xml Encoding rules; XML Encoding rules; PER encoding rules; PER Encoding Rules; Per Encoding Rules; Per encoding rules; Generic String Encoding Rules; Generic string encoding rules; Generic String encoding rules; Generic string Encoding Rules; GSER Encoding Rules; GSER encoding rules; Gser encoding rules; Gser Encoding Rules; CXER; Cxer; Canonical XML Encoding Rules; Canonical XML encoding rules; Canonical Xml encoding rules; Canonical xml encoding rules; Canonical Xml Encoding Rules; Asn.1; Extension root; Asn1; Abstract Syntax Notation 1x; Octet encoding rules; JSON encoding rules

Abstract Syntax Notation 1

<language, standard, protocol> (ASN.1, X.208, X.680) An ISO/ITU-T standard for transmitting structured data on networks, originally defined in 1984 as part of {CCITT X.409} '84. ASN.1 moved to its own standard, X.208, in 1988 due to wide applicability. The substantially revised 1995 version is covered by the X.680 series. ASN.1 defines the abstract syntax of information but does not restrict the way the information is encoded. Various ASN.1 encoding rules provide the transfer syntax (a concrete representation) of the data values whose {abstract syntax} is described in ASN.1. The standard ASN.1 encoding rules include BER (Basic Encoding Rules - X.209), CER (Canonical Encoding Rules), DER (Distinguished Encoding Rules) and PER (Packed Encoding Rules). ASN.1 together with specific ASN.1 encoding rules facilitates the exchange of structured data especially between application programs over networks by describing data structures in a way that is independent of machine architecture and implementation language. OSI Application layer protocols such as X.400 MHS electronic mail, X.500 directory services and SNMP use ASN.1 to describe the PDUs they exchange. Documents describing the ASN.1 notations: ITU-T Rec. X.680, ISO 8824-1; ITU-T Rec. X.681, ISO 8824-2; ITU-T Rec. X.682, ISO 8824-3; ITU-T Rec. X.683, ISO 8824-4 Documents describing the ASN.1 encoding rules: ITU-T Rec. X.690, ISO 8825-1; ITU-T Rec. X.691, ISO 8825-2. [M. Sample et al, "Implementing Efficient Encoders and Decoders for Network Data Representations", IEEE Infocom 93 Proc, v.3, pp. 1143-1153, Mar 1993. Available from Logica, UK]. See also snacc. (2005-07-03)

abstract syntax tree

TREE REPRESENTATION OF THE ABSTRACT SYNTACTIC STRUCTURE OF SOURCE CODE

Abstract syntax trees; Abstract Syntax Tree; Abstract syntax tree representation

<compiler> (AST) A data structure representing something which has been parsed, often used as a compiler or interpreter's internal representation of a program while it is being optimised and from which code generation is performed. The range of all possible such structures is described by the abstract syntax. (1994-11-08)

Abstract syntax tree

TREE REPRESENTATION OF THE ABSTRACT SYNTACTIC STRUCTURE OF SOURCE CODE

Abstract syntax trees; Abstract Syntax Tree; Abstract syntax tree representation

In computer science, an abstract syntax tree (AST), or just syntax tree, is a tree representation of the abstract syntactic structure of text (often source code) written in a formal language. Each node of the tree denotes a construct occurring in the text.

https://en.wikipedia.org/wiki/Abstract_syntax_tree

Wikipedia

ASN.1

Abstract Syntax Notation One (ASN.1) is a standard interface description language for defining data structures that can be serialized and deserialized in a cross-platform way. It is broadly used in telecommunications and computer networking, and especially in cryptography.

Protocol developers define data structures in ASN.1 modules, which are generally a section of a broader standards document written in the ASN.1 language. The advantage is that the ASN.1 description of the data encoding is independent of a particular computer or programming language. Because ASN.1 is both human-readable and machine-readable, an ASN.1 compiler can compile modules into libraries of code, codecs, that decode or encode the data structures. Some ASN.1 compilers can produce code to encode or decode several encodings, e.g. packed, BER or XML.

ASN.1 is a joint standard of the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) in ITU-T Study Group 17 and ISO/IEC, originally defined in 1984 as part of CCITT X.409:1984. In 1988, ASN.1 moved to its own standard, X.208, due to wide applicability. The substantially revised 1995 version is covered by the X.680 series. The latest revision of the X.680 series of recommendations is the 6.0 Edition, published in 2021.

https://en.wikipedia.org/wiki/ASN.1