Index: generic/predefined.h
===================================================================
diff -u -ra5e4ab3a3f85b51e855adb3fe981833c2534ee8b -r756a5ed4e51921ada898fdf69cc7bd2c5c616828
--- generic/predefined.h	(.../predefined.h)	(revision a5e4ab3a3f85b51e855adb3fe981833c2534ee8b)
+++ generic/predefined.h	(.../predefined.h)	(revision 756a5ed4e51921ada898fdf69cc7bd2c5c616828)
@@ -30,6 +30,12 @@
 "uplevel [list ::nsf::relation $object $rel \"\"]}}\n"
 "::nsf::method::provide autoname {::nsf::method::alias autoname ::nsf::methods::object::autoname}\n"
 "::nsf::method::provide exists   {::nsf::method::alias exists   ::nsf::methods::object::exists}\n"
+"proc ::nsf::unknown {name} {\n"
+"foreach {key handler} [array get ::nsf::unknown] {\n"
+"set result [uplevel [list {*}$handler $name]]\n"
+"if {$result ne \"\"} {\n"
+"return $result}}\n"
+"return \"\"}\n"
 "proc ::nsf::exithandler {args} {\n"
 "lassign $args op value\n"
 "switch $op {\n"