[::] as a context clarifier

4.9: adda/syntax/type/[::] as a context clarifier:
. confusing having syntax"(type`value) when
(`) already has a specific meaning: (x`f);
so, maybe a good idea to use (::) as a
context specifier (type::value) ?
t.type: .< .(fields), .{values}, f(x).t, `method.t >
-- so then (x.t) lets me call { x`method, f(x) }
but if (`) was the context operator,
then we have { t::f, t::method }.