The CSN.1 Specification

	The CSN.1 Specification
		Page last updated 2005.03.18

CSN.1 ("Concrete Syntax Notation 1") is a notation used for the description of the encoding of signalling messages. A kernel of it was originally designed for specific needs of the GSM standard, as a tool for the description of bit-efficient messages.
Version 2.0 of the CSN.1 specification is used in the GSM specifications and other protocol specifications.
Among its features, it enables, for a given signalling protocol:

to define the set of correctly encoded messages ;
to label parts of correctly encoded messages, enabling easy reference within the semantic description of the protocol ;
to ease the taking into account of compatibility between versions ;
to define specific strings for test purposes.

CSN.1 is fully compilable.

How to order a colour booklet containing the CSN.1 Specification, version 2.0
by M. MOULY, ISBN 2-9510062-0-9

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