diff --git a/docs/api/models.rst b/docs/api/models.rst
index 75f9ab02..a0e4f0b6 100644
--- a/docs/api/models.rst
+++ b/docs/api/models.rst
@@ -6,3 +6,13 @@
     :synopsis: Immutable data models.
     :members:
     :undoc-members:
+
+Model relations
+===============
+
+.. digraph:: model_relations
+
+    Playlist -> Track [ label="has multiple" ]
+    Track -> Album [ label="has one" ]
+    Track -> Artist [ label="has multiple" ]
+    Album -> Artist [ label="has multiple" ]