This is Perl module Test::Vars. INSTALLATION Test::Vars installation is straightforward. If your CPAN shell is set up, you should just be able to do $ cpan Test::Vars Download it, unpack it, then build it as per the usual: $ perl Makefile.PL $ make && make test Then install it: $ make install DOCUMENTATION Test::Vars documentation is available as in POD. So you can do: $ perldoc Test::Vars to read the documentation online with your favorite pager. Goro Fuji (gfx)