CORBA35 — 69.3.2.14 The idl Element, page 69-478

a) Add idl element to implementation element. Why is idl only at the
softpkg level?
This is saying that all implementations use the same IDL. This is
inconsistent with
descriptor element. An implementation can specify a descriptor, why not
idl? Cannot
an implementation use a specific IDL for its implementation?

b) Why is IDL defined in the software package descriptor instead of the
CORBA
Component descriptor?