module VarSet: Set.Make(sig type t = Rdf_sparql_types.var val compare : Rdf_sparql_types.var -> Rdf_sparql_types.var -> intend)
Set.Make
(
sig
type t = Rdf_sparql_types.var
Rdf_sparql_types.var
val compare : Rdf_sparql_types.var -> Rdf_sparql_types.var -> int
Rdf_sparql_types.var -> Rdf_sparql_types.var -> int
end
)