--- a/xml.rst	Fri Nov 02 09:25:04 2012 +0200
+++ b/xml.rst	Sat Nov 03 19:27:46 2012 +0200
@@ -12,6 +12,13 @@
  * http://xmlhack.ru
  * http://microformats.org/wiki/namespaces-considered-harmful
 
+Converting between schema formants.
+===================================
+::
+
+  $ man trang
+  trang [-I rng|rnc|dtd|xml] [-O rng|rnc|dtd|xsd] $input $output
+
 relaxng-mode.
 =============