[Haskell-cafe] "Using GHC as a library"?

Hello, I am reading 1) http://hackage.haskell.org/trac/ghc/wiki/Commentary/Compiler/API 2) http://haskell.org/haskellwiki/GHC/As_a_library Conceptually by allowing importation of GHC itself into a problem is this some kind of reification? Kind regards, vasya