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ASN.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 1998
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.
(2000-10-20)
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Nearby terms:
abstract machine « Abstract Machine Notation « abstract syntax « Abstract Syntax Notation 1 » abstract syntax tree » Abstract-Type and Scheme-Definition Language » Abstract Windowing Toolkit
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
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