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