diff --git a/docs/data-model.rst b/docs/data-model.rst
new file mode 100644
index 0000000000000000000000000000000000000000..f365f9f258de61421735fefce9b21747a0209fd4
--- /dev/null
+++ b/docs/data-model.rst
@@ -0,0 +1,13 @@
+.. _data-model:
+
+Software Heritage data model
+============================
+
+TODO
+
+Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor
+incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis
+nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
+consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
+cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
+proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
diff --git a/docs/index.rst b/docs/index.rst
index 8b6411705cecf6d5bf15b2b95740d87ad2dc9ab8..22eccfdcec5757904f4fb768d85c504a96acaa69 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -6,6 +6,11 @@ Software Heritage - Development Documentation
    :caption: Contents:
 
 
+Overview
+--------
+
+* :ref:`data-model`
+
 
 Indices and tables
 ==================