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