diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d41b9e5
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,5 @@
+[submodule "projects/tmp"]
+	path = projects/tmp
+	url = git@kuhl-mann.de:lattice/charm_SF_data.git
+	datalad-id = 5f402163-77f2-470e-b6f1-64d7bf9f87d4
+	datalad-url = git@kuhl-mann.de:lattice/charm_SF_data.git
diff --git a/projects/tmp b/projects/tmp
new file mode 160000
index 0000000..216fe4e
--- /dev/null
+++ b/projects/tmp
@@ -0,0 +1 @@
+Subproject commit 216fe4ed3467ed486390735f8072856cf3d0a409