namespace cgi="http://apstandard.com/ns/1/cgi"
namespace h="http://apstandard.com/ns/1/cgi/handlers"

handlerType = attribute h:handler-type {
   "executable" |
   "perl" |
   "php" |
   "python" |
   "ssi"
}

start = element cgi:handler {
  (element cgi:disabled { empty }
  |element cgi:extension {
     handlerType?,
     text
   }*
  |element cgi:all-files {
     handlerType?
   }
  )
}