Index: TODO
===================================================================
diff -u -r5b2eafb18ce22d7aa8cef352f535da5046cac7d9 -re81c69e53c56a298227bc9e349ff6918d03ef94a
--- TODO	(.../TODO)	(revision 5b2eafb18ce22d7aa8cef352f535da5046cac7d9)
+++ TODO	(.../TODO)	(revision e81c69e53c56a298227bc9e349ff6918d03ef94a)
@@ -2539,9 +2539,11 @@
 * various documentation updates (migration guide, nx tutorial)
 * fixed bad interaction between filter and parameter alias
 
+* some documentation/todo updates
+
 TODO:
 - maybe the destructor of a slot should remove the setter/forwarder
-- how to delete attributes
+- how to delete attributes?
 
 - when alloc|dealloc are loaded via require, we have
   no redefined-protection on those. Since the script does not know,
@@ -2551,16 +2553,15 @@
   "class|object ?-per-object?" is inserted at the 1nd pos.
   This is not sufficient, if we would like to test in this 
   script, whether the first arg is e.g. a class.
-- make pot.unknown client data more safe (see above)
-- check removal of more internal-callback methods
-- update method-summary and differences to xotcl
-  in tutorial/migration guide
 
+- make potentially unknown clientData more safe (error message,
+  when something is passed via clientData to a method expecting
+  an object/class as clientData). Code is in gentclAPI.h
+
 - document value added replacements of Tcl functions
 
 - object parameter type forward:
    - regression test
-   - reduce verbosity
    - get rid of eager tcd creation (optimization, can go to future releases)
 
 - slotmachinerie 2
Index: doc/next-migration.html
===================================================================
diff -u -rb3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b -re81c69e53c56a298227bc9e349ff6918d03ef94a
--- doc/next-migration.html	(.../next-migration.html)	(revision b3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b)
+++ doc/next-migration.html	(.../next-migration.html)	(revision e81c69e53c56a298227bc9e349ff6918d03ef94a)
@@ -5923,7 +5923,7 @@
 Bar b1</pre></div></div>
 </div>
 <div class="sect3">
-<h4 id="_ignored_parameter_definitions_2">4.2.3. Ignored Parameter definitions</h4>
+<h4 id="_changing_classes_and_superclasses">4.2.3. Changing classes and superclasses</h4>
 <div class="paragraph"><p>NX does not define the methods <tt>class</tt> and <tt>superclass</tt> but allows to
 alter the class/superclass via <tt>configure</tt>. The class and superclass
 can be certainly queried in all variants with <tt>info class</tt> or <tt>info superclass</tt>.</p></div>
@@ -5942,8 +5942,11 @@
 </span>
 <span class='nx-keyword'>nx::Class</span> <span class='nx-keyword'>create</span> Foo
 Foo <span class='nx-keyword'>create</span> f1
-<span class='nx-comment'># now oalter the class of object f1
-</span>f1 configure -<span class='nx-keyword'>class</span> <span class='nx-keyword'>nx::Object</span></pre></div></div>
+<span class='nx-comment'># now alter the class of object f1
+</span>f1 configure -<span class='nx-keyword'>class</span> <span class='nx-keyword'>nx::Object</span>
+
+<span class='nx-comment'># alternate approach via Next Scripting Framework
+</span>::nsf::relation f1 <span class='nx-keyword'>class</span> ::<span class='nx-keyword'>nx::Object</span></pre></div></div>
 </div>
 </div>
 <div class="sect2">
@@ -6018,7 +6021,7 @@
 <div id="footer">
 <div id="footer-text">
 Version 2.1<br />
-Last updated 2011-03-18 12:09:38 CET
+Last updated 2011-03-20 21:55:44 CET
 </div>
 </div>
 </body>
Index: doc/next-migration.txt
===================================================================
diff -u -rb3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b -re81c69e53c56a298227bc9e349ff6918d03ef94a
--- doc/next-migration.txt	(.../next-migration.txt)	(revision b3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b)
+++ doc/next-migration.txt	(.../next-migration.txt)	(revision e81c69e53c56a298227bc9e349ff6918d03ef94a)
@@ -2475,7 +2475,7 @@
 Bar b1
 ----------------
 
-==== Ignored Parameter definitions
+==== Changing classes and superclasses
 
 NX does not define the methods +class+ and +superclass+ but allows to
 alter the class/superclass via +configure+. The class and superclass
@@ -2486,8 +2486,11 @@
 
 nx::Class create Foo
 Foo create f1
-# now oalter the class of object f1
+# now alter the class of object f1
 f1 configure -class nx::Object
+
+# alternate approach via Next Scripting Framework
+::nsf::relation f1 class ::nx::Object
 ----------------
 
 
Index: library/nx/nx.tcl
===================================================================
diff -u -r5b2eafb18ce22d7aa8cef352f535da5046cac7d9 -re81c69e53c56a298227bc9e349ff6918d03ef94a
--- library/nx/nx.tcl	(.../nx.tcl)	(revision 5b2eafb18ce22d7aa8cef352f535da5046cac7d9)
+++ library/nx/nx.tcl	(.../nx.tcl)	(revision e81c69e53c56a298227bc9e349ff6918d03ef94a)
@@ -10,8 +10,10 @@
 
   #
   # First create the ::nx object system. The interally called methods,
-  # which are not defined by default (from this script), must have
-  # method handles included.
+  # which are not defined by in this script, must have method handles
+  # included. The methods "create", "configure", "destroy", "move" and
+  # "objectparameter" are defined in this script (either scripted, or
+  # aliases).
   #
   ::nsf::createobjectsystem ::nx::Object ::nx::Class {
     -class.alloc {alloc ::nsf::methods::class::alloc}