This is Perl module Data::Validator. INSTALLATION Install cpanm (App::cpanminus) and then run the following command to install Data::Validator: $ cpanm Data::Validator If you get an archive of this distribution, unpack it and build it as per the usual: $ tar xzf Data-Validator-$version.tar.gz $ cd Data-Validator-$version $ perl Makefile.PL $ make && make test Then install it: $ make install DOCUMENTATION Data::Validator documentation is available as in POD. So you can do: $ perldoc Data::Validator to read the documentation online with your favorite pager. LICENSE AND COPYRIGHT Copyright (c) 2010, gfx. All rights reserved. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.