diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..3c8d44f19760ac94e66d8ea28ea31036f1f518f5
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "arf005"]
+	path = arf005
+	url = git@forge.etsi.org:arf/openapi.git
diff --git a/arf005 b/arf005
new file mode 160000
index 0000000000000000000000000000000000000000..af5fc2355f7b03fbc76e9d9e04452044d4b5ca8d
--- /dev/null
+++ b/arf005
@@ -0,0 +1 @@
+Subproject commit af5fc2355f7b03fbc76e9d9e04452044d4b5ca8d