merge from HEAD

Author: Richard Jones

doc/customizing.txt

@@ -2,7 +2,7 @@
 Customising Roundup
 ===================
 
-:Version: $Revision: 1.161.2.3 $
+:Version: $Revision: 1.161.2.4 $
 
 .. This document borrows from the ZopeBook section on ZPT. The original is at:
    http://www.zope.org/Documentation/Books/ZopeBook/current/ZPT.stx
@@ -447,6 +447,17 @@ A Class is comprised of one or more properties of the following types:
 * A Multilink property refers to possibly many items in a specified
   class. The value is a list of integers.
 
+All Classes automatically have a number of properties by default:
+
+*creator*
+  Link to the user that created the item.
+*creation*
+  Date the item was created.
+*actor*
+  Link to the user that last modified the item.
+*activity*
+  Date the item was last modified.
+
 
 FileClass
 ~~~~~~~~~