Abstract syntax notation 1

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.

Read Also:

  • Abstract syntax tree

    abstract syntax tree 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 thinking

    abstract thinking abstract thinking n. Thinking characterized by the ability to use concepts and to make and understand generalizations, such as of the properties or pattern shared by a variety of specific items or events. Contemporary Examples It also leads to a corresponding increase in risk-taking and abstract thinking. Petraeus May Have Been Felled by […]

  • Abstract window toolkit

    abstract window toolkit graphics (AWT) Java’s platform-independent windowing, graphics, and user-interface toolkit. The AWT is part of the Java Foundation Classes (JFC) – the standard API for providing a graphical user interface (GUI) for a Java program. Compare: SWING. [“Java in a Nutshell”, O’Reilly]. (http://java.sun.com/products/jdk/awt/). (2000-07-26)

  • Abstract windowing toolkit

    abstract windowing toolkit Abstract Window Toolkit

  • Abstracted

    lost in thought; deeply engrossed or preoccupied. thought of apart from concrete realities, specific objects, or actual instances: an abstract idea. expressing a quality or characteristic apart from any specific object or instance, as justice, poverty, and speed. theoretical; not applied or practical: abstract science. difficult to understand; abstruse: abstract speculations. Fine Arts. of or […]

Disclaimer: Abstract syntax notation 1 definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.