Summary

This Recommendation defines how Abstract Syntax Notation One (ASN.1) modules are usable in combination with Specification and Description Language (SDL). This text replaces Recommendation ITU-T Z.105 (2003) to align with Recommendations ITU-T Z.100, Z.101, Z.102, Z.103, Z.104 and Z.106 for SDL 2010. Recommendation ITU-T Z.105 (2003) replaced the semantic mappings from ASN.1 to SDL-2000 defined in Recommendation ITU-T Z.105 (1999). The use of ASN.1 notation embedded in SDL previously defined in Recommendation ITU-T Z.105 (1995) is not defined by this Recommendation.

The main area of application of this Recommendation is the specification of telecommunication systems. The combined use of SDL-2010 and ASN.1 permits a coherent way to specify the structure and behaviour of telecommunication systems, together with data, messages and encoding of messages that these systems use.

This version of Recommendation ITU-T Z.105 includes necessary alignments with ASN.1:2002 Recommendations. The important changes include mapping of XML values, improved mapping of bit string values and added mapping of relevant ASN.1 constructs for extensions.