--- a/src/core/model/attribute.cc	Wed Jan 07 15:41:00 2015 -0800
+++ b/src/core/model/attribute.cc	Wed Jan 07 15:43:53 2015 -0800
@@ -23,6 +23,13 @@
 #include "string.h"
 #include <sstream>
 
+/**
+ * \file
+ * \ingroup attribute
+ * ns3::AttributeValue, ns3::AttributeAccessor and
+ * ns3::AttributeChecker implementations.
+ */
+
 namespace ns3 {
 
 NS_LOG_COMPONENT_DEFINE ("AttributeValue");