sematic scope: static variable in CPP with explicit namespacing

[huwenhuo]

My apologies if this has been brought up here before.

Here is my sample code, class.cpp

static int xx;

namespace app{
  class yy{};
}

My questions is what is the scope of xx here? Is it any difference than the one without namespace app{}? Possible answer:
1. xx is global (probably not)
2. only object from yy can see xx


What about the zz in this one?

static int xx;

namespace app{
  static int zz;
  class yy{};
}