diff --git a/core/model/DataDifferencer.php b/core/model/DataDifferencer.php
new file mode 100644
index 000000000..1f7bdbb77
--- /dev/null
+++ b/core/model/DataDifferencer.php
@@ -0,0 +1,87 @@
+<?php
+
+/**
+ * Utility class to render views of the differences between two data objects (or two versions of the
+ * same data object).
+ * 
+ * Construcing a diff object is done as follows:
+ * <code>
+ * $fromRecord = Versioned::get_version('SiteTree', $pageID, $fromVersion);
+ * $toRecord = Versioned::get_version('SiteTree, $pageID, $toVersion);
+ * $diff = new DataDifferencer($fromRecord, $toRecord);
+ * </code>
+ * 
+ * And then it can be used in a number of ways.  You can use the ChangedFields() method in a template:
+ * <pre>
+ * <dl class="diff">
+ * <% control Diff.ChangedFields %>
+ *    <dt>$Title</dt>
+ *    <dd>$Diff</dd>
+ * <% end_control %>
+ * </dl>
+ * </pre>
+ * 
+ * Or you can get the diff'ed content as another DataObject, that you can insert into a form.
+ * <code>
+ * $form->loadDataFrom($diff->diffedData());
+ * </code>
+ * 
+ * If there are fields whose changes you aren't interested in, you can ignore them like so:
+ * <code>
+ * $diff->ignoreFields('AuthorID', 'Status');
+ * </code>
+ */
+class DataDifferencer extends ViewableData {
+	protected $fromRecord;
+	protected $toRecord;
+	
+	protected $ignoredFields = array("ID","Version","RecordID");
+	
+	function __construct($fromRecord, $toRecord) {
+		$this->fromRecord = $fromRecord;
+		$this->toRecord = $toRecord;
+	}
+	
+	/**
+	 * Specify some fields to ignore changes from.  Repeated calls are cumulative.
+	 * @param $ignoredFields An array of field names to ignore.  Alternatively, pass the field names as
+	 * separate args.
+	 */
+	function ignoreFields($ignoredFields) {
+		if(!is_array($ignoredFields)) $ignoredFields = func_get_args();
+		$this->ignoredFields = array_merge($this->ignoredFields, $ignoredFields);
+	}
+	
+	function diffedData() {
+		$diffed = clone $this->fromRecord;
+		$fields = array_keys($diffed->getAllFields());
+		
+		foreach($fields as $field) {
+			if(in_array($field, $this->ignoredFields)) continue;
+			
+			if($this->fromRecord->$field != $this->toRecord->$field) {			
+				$diffed->$field = Diff::compareHTML($this->fromRecord->$field, $this->toRecord->$field);
+			}
+		}
+		
+		return $diffed;
+	}
+	
+	function ChangedFields() {
+		$changedFields = new DataObjectSet();
+		$fields = array_keys($this->fromRecord->getAllFields());
+		
+		foreach($fields as $field) {
+			if(in_array($field, $this->ignoredFields)) continue;
+
+			if($this->fromRecord->$field != $this->toRecord->$field) {			
+				$changedFields->push(new ArrayData(array(
+					'Title' => $this->fromRecord->fieldLabel($field),
+					'Diff' => Diff::compareHTML($this->fromRecord->$field, $this->toRecord->$field),
+				)));
+			}
+		}
+		
+		return $changedFields;
+	}
+}
\ No newline at end of file