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diff --git a/src/data/ChangeLog b/src/data/ChangeLog
index 70485fd9..ddf6e685 100644
--- a/src/data/ChangeLog
+++ b/src/data/ChangeLog
@@ -1,3 +1,8 @@
+2007-07-26 John Darrington <john@darrington.wattle.id.au>
+
+	* procedure.c procedure.h: Added callbacks which get invoked whenever 
+	a dataset's transformation chain changes.
+
 2007-07-24  Ben Pfaff  <blp@gnu.org>
 
 	Fix bug #6113.