Application_specific_fields is a single field in the build-info sexp that holds a Sexp.t String.Map.t, which can be chosen by the application to hold custom fields that it needs.
Application_specific_fields
Sexp.t String.Map.t
type t
= Core_kernel__.Std_internal.Sexp.t Core_kernel__.Std_internal.String.Map.t
include sig ... end
val t_of_sexp : Sexplib.Sexp.t ‑> t
val sexp_of_t : t ‑> Sexplib.Sexp.t