Global Data

Global Data" ?> In order to access global data, we again utilize Tcl's namespace hierarchy:

namespace eval request {
    set ::global_data [clock seconds]
}
namespace delete request

namespace eval request {
    puts "The last person to access this child process came at:"
    puts [clock format $::global_data]
}
namespace delete request

As we can see, the first request sets a variable in the global namespace, where it won't be destroyed when the 'request' namespace is deleted. This makes it accessible to other scripts.