[Haskell-beginners] How to know which module my library belongs to ?

Hello, I am writing a finite element method (FEM) library. Nothing serious at the moment, this is my home project to help me learn Haskell and add my stone to the community, as I did not find such a library. For the JSON library, in the folder of the library, there are some files for the licence and cabal, a directoy for the tests and a directory Text, in which there is the directory JSON and the file JSON.hs. I don't know which module should be the parent of my library. I think it is in Mathematics and Physics, like MEEPS for example, but I prefer to ask here to be sure. Many thanks in advance, Adrien