A standard library, with batteries included
Core is a souped-up and filled-out version of Base, Jane Street’s minimal standard library replacement. Some Core modules are extensions of their counterparts in Base, usually adding generic functionality by including functors that make them binable , comparable , sexpable , blitable , etc.
The APIs in Core are more full-featured, but do move faster than those in Base.
$ opam install core
Where Core fits in
Jane Street has three standard library packages that offer varying levels of completeness and stability. Here’s how they fit together: