SET</TT></A>,
    <A href="map.html"><TT>MAP</TT></A>,
    <A href="ordered.html"><TT>ORDERED</TT></A>
  </P>

<?php section("import", "import") ?>

  <PRE>
    import signature SET from "x-alice:/lib/data/SET-sig"
    import functor MkRedBlackSet from "x-alice:/lib/data/MkRedBlackSet"</PRE>

<?php section("interface", "interface") ?>

  <PRE>
    signature SET =
    sig
	type item
	type set
	type t = set

	exception Unknown of item
	exception Collision of item

	val empty :          set
	val singleton :   