diff --git a/types.hpp b/types.hpp
index d8a1386..555dce3 100644
--- a/types.hpp
+++ b/types.hpp
@@ -44,5 +44,12 @@
 using Id = uint8_t;
 using IdInfoMap = std::map<Id,Info>;
 
+using PropertyMap = std::map<DbusProperty, Value>;
+
+using InterfaceMap = std::map<DbusInterface, PropertyMap>;
+
+using Object = sdbusplus::message::object_path;
+using ObjectMap = std::map<Object, InterfaceMap>;
+
 }//namespce sensor
 }//namespace ipmi