diff --git a/dbus.hpp b/dbus.hpp
index 392dd8a..c572d99 100644
--- a/dbus.hpp
+++ b/dbus.hpp
@@ -14,8 +14,16 @@
 using DbusProperty = std::string;
 using DbusService = std::string;
 using DbusPath = std::string;
+
+static constexpr auto forwardPos = 0;
+static constexpr auto reversePos = 1;
+static constexpr auto endpointPos = 2;
+using AssociationsPropertyType =
+    std::vector<std::tuple<std::string, std::string, std::string>>;
+
 using Value = sdbusplus::message::variant<bool, uint32_t, uint64_t, std::string,
-                                          std::vector<std::string>>;
+                                          std::vector<std::string>,
+                                          AssociationsPropertyType>;
 
 using DbusPropertyMap = std::map<DbusProperty, Value>;
 using DbusInterfaceMap = std::map<DbusInterface, DbusPropertyMap>;