Martin Dowie <martin@dowie-cs.demon.co.uk> writes:

> Apex describe them on their web site -
> "Rational Apex provides a framework for defining architectural
> components, known as Rational Subsystems�. These subsystems
> integrate with the Rational Apex version control system and with Ada
> 95 package hierarchies. Rational Apex prevents undesirable code
> references by controlling visibility among architectural
> components. Attempts to improperly reference units results in
> compile time error messages. In this way, subsystems enable users to
> automatically express and enforce the large-scale structure, or
> architecture, of their applications."

Subsystems may be good for a lot of things, but this particular one
has always struck me as odd; especially in an environment where code
is designed before it's implemented, and inspected afterwards.