[Boost-users] [Spirit] Version question

Hello, I want to use Boost.Spirit to parse some data so I'm reading the documentation. I'm a little confused because the documentation linked to from 1.37.0 takes me to a Spirit user's guide apparently regarding "Spirit classic". Does Boost 1.37.0 include two Spirit versions? If so, do I need to be looking elsewhere for documentation on how to use the non-classic version? Essentially I want to use the latest version of Spirit that comes with Boost 1.37.0 and would like guidance on that please. Regards, Pete