Index: doc.html
===================================================================
--- doc.html	(revision 5644)
+++ doc.html	(revision 5645)
@@ -26,6 +26,7 @@
 <ul>
 	<li> <a href="user/index.html"> user manual (sparse) </a>
 	<li> <a href="developer/"> developer's corner </a>
+	<li> <a href="design/"> design doc </a> of cschem, the data model
 	<li> <a href="http://repo.hu/projects/sch-rnd-aux/pool">sch-rnd knowledge pool</a>
 </ul>