6 [basic] p1 wording (needs NB comment)

[camio]

Roger: This the list of syntaxes introducing an alias does not include
"namespace-alias-definition".

s/an alias-declaration, or a using-declaration./an alias-declaration, a
namespace-alias-definition, or a using-declaration./

Axel: I believe the intention was to have alias-declaration a type declaration.
A namespace-alias-definition does not name a type.

Maybe "alias" should be called "type alias"? That might be worth bringing up
on the CWG reflector.

Roger: Table 12 lists 'namespace-alias' as reflecting both reflect::Namespace and
reflect::Alias. It seems confusing to me if alias and reflect::Alias don't
match ...

Happy to leave this for now, we might want n NB comment at PDTS time? (I'm
also not sure what this does to 10.1.7.6 - I don't see how the name in a
namespace-alias-definition is reference related to anything else unless is
qualifies as an alias.)