\defgroup Roofitmain RooFit package
\brief RooFit is a package for building likelihood models and fitting these to data.
For an introduction check the tutorials \ref tutorial_roofit, [user's guides](https://root.cern.ch/root-user-guides-and-manuals),
[courses](https://root.cern.ch/courses) or [RooFit in 20 minutes](https://root.cern.ch/roofit-20-minutes).

\defgroup Roofitcore  Roofitcore
\brief RooFit core classes. These provide the infrastructure for building likelihood models.
\ingroup Roofitmain


\defgroup Roofitlegacy Roofitlegacy
\brief Old RooFit classes
\ingroup Roofitmain

This group contains classes that are provided for backward compatibility, but there's no need to use them in new code.
