Question 11/X - Harmonization of the use of SDL and CHILL

Introduction

The proposal is a single Question for the harmonization of the use of
SDL and CHILL. The rationale in the Question is that many users use both
techniques in one methodology.

1. Harmonization of the use of SDL and CHILL

Considering

(a) that SDL has been recommended and is widely used for the functional
specification and description of telecommunications systems, and that
SDL is now a rigorously defined language which offers a basis for
defining CCITT Recommendations in a formal or informal way;

(b) that CHILL has been recommended and is widely used as the
programming language for telecommunications systems;

(c) that SDL and CHILL are widely used together in an overall
methodology for support of telecommunications systems;

(d) that there are major benefits to administrations, recognized private
operating agencies and system suppliers in keeping SDL and CHILL stable,
and providing suitable material for guidance and education in the use of
SDL and CHILL,

What new Recommendations, or changes to existing Recommendations,
requirements, or other provisions are required to:

1) promote and support the harmonized use of SDL and CHILL ensuring that
such use is in compliance with the Recommendations,

2) exploit the capabilities of the languages in combination, in
particular the ability of SDL to support formal specification, the
relationships between the languages, and the data abstraction in CHILL,

3) give guidelines for methods related to the various coordinated uses
of SDL and CHILL?