Standard ML

Standard ML (SML; "Standard Meta Language") is a general-purpose, modular, functional programming language with compile-time type checking and type inference. It is popular among compiler writers and programming language researchers, as well as in the development of theorem provers.

SML is a modern dialect of ML, the programming language used in the Logic for Computable Functions theorem-proving project. It is distinctive among widely used languages in that it has a formal specification.