diff --git a/power-sequencer/types.hpp b/power-sequencer/types.hpp
new file mode 100644
index 0000000..aac6c36
--- /dev/null
+++ b/power-sequencer/types.hpp
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <map>
+#include <string>
+#include <tuple>
+
+namespace witherspoon
+{
+namespace power
+{
+namespace ucd90160
+{
+
+constexpr auto pathField = 0;
+
+//Future commits will add more entries
+using DeviceDefinition = std::tuple<std::string>;
+
+//Maps a device instance to its definition
+using DeviceMap = std::map<size_t, DeviceDefinition>;
+
+}
+}
+}