#open FOO, "my_favourite.yum"  or die "horribly $!" ;
open FOO, '<', &my_favourite_yum  or die "horribly $!" ;

##</code><code>##

#______________________________________
# ... description of the data ...
sub my_favourite_yum { \(<<'~~FILE') }
  ... contents of my_favourite.yum go here ...
~~FILE
#______________________________________
# ... description....
sub my_other_favourite { \(<<'~~FILE') }
  ... contents of my_other_favourite go here ...
~~FILE
#______________________________________