Ada 2005 Reference Manual
A.2 The Package Ada
Static Semantics
The following language-defined library package exists:
package Ada is
pragma Pure(Ada);
end Ada;
pragma Pure(Ada);
end Ada;
Ada serves as the parent of most of the other language-defined library units; its declaration is empty (except for the pragma Pure).
Legality Rules
In the standard mode, it is illegal to compile a child of package Ada.
