diff -r a7f85074c169 -r 880e587eee9f src/HOL/Import/Import_Setup.thy
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/Import/Import_Setup.thy	Sun Apr 01 14:50:47 2012 +0200
@@ -0,0 +1,33 @@
+(*  Title:      HOL/Import/Import_Setup.thy
+    Author:     Cezary Kaliszyk, University of Innsbruck
+    Author:     Alexander Krauss, QAware GmbH
+*)
+
+header {* Importer machinery and required theorems *}
+
+theory Import_Setup
+imports "~~/src/HOL/Parity" "~~/src/HOL/Fact"
+keywords
+    "import_type_map" :: thy_decl and "import_const_map" :: thy_decl and
+    "import_file" :: thy_decl
+uses "import_data.ML" ("import_rule.ML")
+begin
+
+lemma light_ex_imp_nonempty:
+  "P t \<Longrightarrow> \<exists>x. x \<in> Collect P"
+  by auto
+
+lemma typedef_hol2hollight:
+  assumes a: "type_definition Rep Abs (Collect P)"
+  shows "Abs (Rep a) = a \<and> P r = (Rep (Abs r) = r)"
+  by (metis type_definition.Rep_inverse type_definition.Abs_inverse
+      type_definition.Rep a mem_Collect_eq)
+
+lemma ext2:
+  "(\<And>x. f x = g x) \<Longrightarrow> f = g"
+  by auto
+
+use "import_rule.ML"
+
+end
+