I want to know the differences between normative and informative annexes in Ada 95. I am just able to find a list of each of them but not the differences.  What are the differences?
Annexes in Ada95
ada
A normative annex specifies what must be true of any Ada implementation providing that Annex. An informative Annex provides additional description or rationale, but places no requirement on Ada implementations. This is (roughly) the same distinction as between the Ada Reference Manual and the Ada Rationale. 