Index: library/nx/nx.tcl
===================================================================
diff -u -r0e4ebdb092c8158987489b5c26cf11526b2756f5 -ra6a5d4be56157641a50c3a25a348464591980ac6
--- library/nx/nx.tcl	(.../nx.tcl)	(revision 0e4ebdb092c8158987489b5c26cf11526b2756f5)
+++ library/nx/nx.tcl	(.../nx.tcl)	(revision a6a5d4be56157641a50c3a25a348464591980ac6)
@@ -763,9 +763,15 @@
     :alias "info parent"                ::nsf::methods::object::info::parent
     :alias "info precedence"            ::nsf::methods::object::info::precedence
     :alias "info vars"                  ::nsf::methods::object::info::vars
-    :method "info variable definition" {handle}  {return [$handle definition]}
-    :method "info variable name"       {handle}  {return [$handle cget -name]}
-    :method "info variable parameter"  {handle}  {return [$handle parameter]}
+    :method "info variable definition" {handle:object,type=::nx::VariableSlot}  {
+      return [$handle definition]
+    }
+    :method "info variable name" {handle:object,type=::nx::VariableSlot}  {
+      return [$handle cget -name]
+    }
+    :method "info variable parameter" {handle:object,type=::nx::VariableSlot}  {
+      return [$handle parameter]
+    }
   }
 
   ######################################################################