Linkage of various const/static variables

Question

I have a few questions about the linkage from the following variables. By examples of 7.1.1/7 of C++03 and experimenting with compilers (Comeau, Clang and GCC), I came to th

Answer 1

const double pi1 = 3.14; // (e)
extern const double pi1; // (f) valid and 'pi1' is internal

My interpretation is as follows. When considering the linkage of a name we consider previous declarations as well as the one being interpreted at this point in the parse. This is why static int a; extern int a; is OK, but extern int b; static int b; is not.

On encountering the first declaration we note that pi1 is explicitly declared const but neither explicitly declared extern nor previously declared to have external linkage. This matches one of the options of 3.5/2 therefore pi1 has internal linkage.

On encountering the second declaration we ask is pi1 the name of an object that is explicitly declared const but neither explicitly declared extern nor [... blah ...]. I contend that it is because it was so declared at point (e). Sure, it isn't declared that way everywhere but in the same way a was the name of an object declared static when we were considering the extern int a; declaration even though it wasn't declared static everywhere. This, to me, means that the declaration (f) doesn't imply a different linkage from declaration (e).