Containers.InvRelationInvRelation - Relations with access to inverse images.
module Make
(Dom : InvRelationSig.OrderedType)
(CoDom : InvRelationSig.OrderedType) :
InvRelationSig.S
with type dom = Dom.t
and type codom = CoDom.t
and module DomSet = SetExt.Make(Dom)
and module CoDomSet = SetExt.Make(CoDom)Generic functor to build a relation data-type from an ordered domain to an ordered codomain.