(library (rnrs enums (6))
  (export make-enumeration
          enum-set-universe
          enum-set-indexer
          enum-set-constructor
          enum-set->list
          enum-set-member?
          enum-set-subset?
          enum-set=?
          enum-set-union
          enum-set-intersection
          enum-set-difference
          enum-set-complement
          enum-set-projection
          define-enumeration)
  (import (core enums)))
