Index: openacs-4/packages/xowiki/tcl/xowiki-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/xowiki-procs.tcl,v
diff -u -r1.542.2.65 -r1.542.2.66
--- openacs-4/packages/xowiki/tcl/xowiki-procs.tcl	25 Jan 2020 13:40:39 -0000	1.542.2.65
+++ openacs-4/packages/xowiki/tcl/xowiki-procs.tcl	1 Feb 2020 17:59:54 -0000	1.542.2.66
@@ -4099,10 +4099,18 @@
     #
     # We want to be able to create FormPages from all pages.
     # by defining this method, we allow derived applications
-    # to provide their own set of instance attributes
+    # to provide their own set of instance attributes.
     return [list]
   }
 
+  Page instproc add_computed_instance_attributes {} {
+    #
+    # Provide a hook to add computed instances attributes e.g. from a
+    # workflow. This method is used e.g. in form-usages for displaying
+    # instance attributes in a sortable table or via csv.
+    #
+  }
+
   #
   # Methods of ::xowiki::FormPage
   #