namespaces for seperate pages" ?>

To keep pages seperate, we run them in different namespaces, in order to make sure local variables are really local:

This is ok, because 'greeting' disappears when the 'request' namespace is cleaned up after each page: 
namespace eval request {
    set greeting "Hello, World"
    puts -nonewline $greeting
}
namespace delete request
The following code will fail, even if called after the first page above, because 'greeting' has gone away. 
namespace eval request {
    puts -nonewline $greeting
}
namespace delete request