PDME — UML - IDL consistency of role names

Summary: Problem: The role names in the IDL and would-be CDL are NOT the same
as the role names in the UML in section 2.7, e.g. UML prcl_of_dr
is interface PrclOfDr.

(In most sections, the role names do not appear in the UML at all.
The only other section in which the role names appear in the UML
model is 2.2, and in that section the UML and IDL match.)

Recommendation: Either remove the role names from the model in 2.7.2
or spell them to match the IDL.