--- a/doc/book/en/development/datamodel/inheritance.rst	Tue Jul 28 21:14:47 2009 +0200
+++ b/doc/book/en/development/datamodel/inheritance.rst	Tue Jul 28 21:26:46 2009 +0200
@@ -2,4 +2,7 @@
 Inheritance
 -----------
 
+When describing a data model, entities can inherit from other entities as is
+common in object-oriented programming.
+
 XXX WRITME