diff --git a/include/types.hpp b/include/types.hpp
new file mode 100644
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--- /dev/null
+++ b/include/types.hpp
@@ -0,0 +1,41 @@
+/*
+// Copyright (c) 2017 2018 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+*/
+
+#pragma once
+
+#include <map>
+#include <string>
+#include <tuple>
+#include <utility>
+#include <variant>
+#include <vector>
+
+namespace ipmi
+{
+
+using Association = std::tuple<std::string, std::string, std::string>;
+
+using DbusVariant =
+    std::variant<std::string, bool, uint8_t, uint16_t, int16_t, uint32_t,
+                 int32_t, uint64_t, int64_t, double, std::vector<Association>>;
+
+using GetSubTreeType = std::vector<
+    std::pair<std::string,
+              std::vector<std::pair<std::string, std::vector<std::string>>>>>;
+
+using SensorMap = std::map<std::string, std::map<std::string, DbusVariant>>;
+
+} // namespace ipmi