Index: generic/predefined.xotcl
===================================================================
diff -u -r48d5751e9aeb6a4f388f6531a9248c1847b22cae -rf4e75c452cf99c87ad8705c954cb9548652873fa
--- generic/predefined.xotcl	(.../predefined.xotcl)	(revision 48d5751e9aeb6a4f388f6531a9248c1847b22cae)
+++ generic/predefined.xotcl	(.../predefined.xotcl)	(revision f4e75c452cf99c87ad8705c954cb9548652873fa)
@@ -784,13 +784,13 @@
   }
   
   # mixin class for decativating all value checks in slots
-  ::xotcl2::Class create ::xotcl::ObjectParameterSlot::Nocheck {
+  ::xotcl2::Class create ::xotcl::Attribute::Nocheck {
     :method check_single_value args {;}
     :method check_multiple_values args {;}
     :method mk_type_checker args {return ""}
   }
   # mixin class for optimizing slots
-  ::xotcl2::Class create ::xotcl::ObjectParameterSlot::Optimizer {
+  ::xotcl2::Class create ::xotcl::Attribute::Optimizer {
     :method method args  {::xotcl::next; :optimize}
     :method forward args {::xotcl::next; :optimize}
     :protected method init args    {::xotcl::next; :optimize}
@@ -806,7 +806,7 @@
     }
   }
   # register the optimizer per default
-  ::xotcl::Attribute mixin add ::xotcl::ObjectParameterSlot::Optimizer
+  ::xotcl::Attribute mixin add ::xotcl::Attribute::Optimizer
 
 
   ############################################