What's the noun for formalism? Here's the word you're looking for.
formalism
Strict adherence to a given form of conduct, practice etc.
(computing) One of several alternative computational paradigms for a given theory.
(literature) An approach to interpretation and/or evaluation focused on the (usually linguistic) structure of a literary work rather than on the contexts of its origin or reception.
(music) The tendency to elevate formal above expressive value in music, as in serialism.