During March 2003, Glenn Jackman, Don Porter, Donald Arseneau, Arjen Markus and possibly others were discussing procs creating procs during runtime.
One of the issues discussed was that of scope - if a proc creates a proc, without anything fancy being done, in what namespace is the runtime created proc?
Here's an example provided by Ulrich Schoebel:
% proc foo {} {proc bar {} {puts baz_1}}
% namespace eval mymy {proc foo {} {proc bar {} {puts baz_2}}}
% foo
% ::mymy::foo
% bar
baz_1
% ::mymy::bar
baz_2
%which appears to demonstrate dgp's assertion that procs with non-fully-qualified names are created in the current namespace, whatever that happens to be.
xonecubed - I created some functions to generate a taged list for the body of a proc. Check out [manipulating proc tags].