--- a/Unused.thy	Thu Dec 10 03:48:39 2009 +0100
+++ b/Unused.thy	Thu Dec 10 04:23:13 2009 +0100
@@ -97,3 +97,30 @@
 (*lemma equality_twice:
   "a = c \<Longrightarrow> b = d \<Longrightarrow> (a = b \<longrightarrow> c = d)"
 by auto*)
+
+
+(*interpretation code *)
+(*val bindd = ((Binding.make ("", Position.none)), ([]: Attrib.src list))
+  val ((_, [eqn1pre]), lthy5) = Variable.import true [ABS_def] lthy4;
+  val eqn1i = Thm.prop_of (symmetric eqn1pre)
+  val ((_, [eqn2pre]), lthy6) = Variable.import true [REP_def] lthy5;
+  val eqn2i = Thm.prop_of (symmetric eqn2pre)
+
+  val exp_morphism = ProofContext.export_morphism lthy6 (ProofContext.init (ProofContext.theory_of lthy6));
+  val exp_term = Morphism.term exp_morphism;
+  val exp = Morphism.thm exp_morphism;
+
+  val mthd = Method.SIMPLE_METHOD ((rtac quot_thm 1) THEN
+    ALLGOALS (simp_tac (HOL_basic_ss addsimps [(symmetric (exp ABS_def)), (symmetric (exp REP_def))])))
+  val mthdt = Method.Basic (fn _ => mthd)
+  val bymt = Proof.global_terminal_proof (mthdt, NONE)
+  val exp_i = [(@{const_name QUOT_TYPE}, ((("QUOT_TYPE_I_" ^ (Binding.name_of qty_name)), true),
+    Expression.Named [("R", rel), ("Abs", abs), ("Rep", rep) ]))]*)
+
+(*||> Local_Theory.theory (fn thy =>
+      let
+        val global_eqns = map exp_term [eqn2i, eqn1i];
+        (* Not sure if the following context should not be used *)
+        val (global_eqns2, lthy7) = Variable.import_terms true global_eqns lthy6;
+        val global_eqns3 = map (fn t => (bindd, t)) global_eqns2;
+      in ProofContext.theory_of (bymt (Expression.interpretation (exp_i, []) global_eqns3 thy)) end)*)
\ No newline at end of file