--- a/src/HOL/BNF_Examples/Derivation_Trees/Prelim.thy Mon Jan 20 18:24:56 2014 +0100
+++ b/src/HOL/BNF_Examples/Derivation_Trees/Prelim.thy Mon Jan 20 18:24:56 2014 +0100
@@ -1,4 +1,4 @@
-(* Title: HOL/BNF/Examples/Derivation_Trees/Prelim.thy
+(* Title: HOL/BNF_Examples/Derivation_Trees/Prelim.thy
Author: Andrei Popescu, TU Muenchen
Copyright 2012
@@ -8,7 +8,7 @@
header {* Preliminaries *}
theory Prelim
-imports "../../BNF/More_BNFs"
+imports "~~/src/HOL/Library/More_BNFs"
begin
declare fset_to_fset[simp]