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