diff --git a/HISTORY.md b/HISTORY.md
index a8d1a024..1ecee113 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,7 +2,15 @@
http://visjs.org
-## 2014-10-16, version 3.5.0
+## not yet released, version 3.5.1
+
+### DataSet
+
+- Event listeners of `update` now receive an extra property `data`,
+ containing the changed fields of the changed items.
+
+
+## 2014-09-16, version 3.5.0
### Network
@@ -15,7 +23,7 @@ http://visjs.org
- Fixed dataAxis not showing large numbers correctly.
-## 2014-10-12, version 3.4.2
+## 2014-09-12, version 3.4.2
### Network
@@ -25,7 +33,7 @@ http://visjs.org
- Fixed minor bug in positioning of fontFill of nodes with certain shapes.
-## 2014-10-11, version 3.4.1
+## 2014-09-11, version 3.4.1
### Network
diff --git a/docs/dataset.html b/docs/dataset.html
index 57010e1d..17d2ab13 100644
--- a/docs/dataset.html
+++ b/docs/dataset.html
@@ -448,8 +448,10 @@ function (event, properties, senderId) {
In case of the events add
,
update
, and remove
,
properties
is always an object containing a property
- items, which contains an array with the ids of the affected
- items.
+ items
, which contains an array with the ids of the affected
+ items. The update
event has an extra field data
+ containing the original data of the updated items, i.e. the gives the
+ changed fields of the changed items.