# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1315762036 -7200
# Node ID 233e032f72059abd92d6a8bc120d800483f4a353
# Parent  adebb233da5ed77d7e3923f48b3b2c3072e1f4e2
Added a note about possible usage of UID properties.

diff -r adebb233da5e -r 233e032f7205 TO_DO.txt
--- a/TO_DO.txt	Sat Sep 10 12:10:29 2011 +0200
+++ b/TO_DO.txt	Sun Sep 11 19:27:16 2011 +0200
@@ -105,3 +105,11 @@
 
 Enhance the linkToEvent method on Event instances so that event sections can
 provide anchors for events in Wiki pages.
+
+UID Properties
+--------------
+
+Especially in the case of aggregation from multiple sources, the only reliable
+way of avoiding repetition of the same events described in different places is
+for authors to include a UID property identifying each event, using the same
+value regardless of where the event is being published.