diff --git a/docs/specs/spec-meta-deposit.rst b/docs/specs/spec-meta-deposit.rst
--- a/docs/specs/spec-meta-deposit.rst
+++ b/docs/specs/spec-meta-deposit.rst
@@ -73,6 +73,10 @@
 References
 ^^^^^^^^^^
 
+The metadata reference can be either on:
+- an origin
+- a graph object (core SWHID with or without qualifiers)
+
 Origins
 =======
 
@@ -96,10 +100,24 @@
 
   <swh:deposit>
     <swh:reference>
-      <swh:object swhid="swh:1:xxx:aaaaaaaaaaaaaa..." />
+      <swh:object swhid="swh:1:dir:31b5c8cc985d190b5a7ef4878128ebfdc2358f49" />
     </swh:reference>
   </swh:deposit>
 
+.. code:: xml
+
+  <swh:deposit>
+    <swh:reference>
+      <swh:object swhid="swh:1:dir:31b5c8cc985d190b5a7ef4878128ebfdc2358f49;
+                         origin=https://hal.archives-ouvertes.fr/hal-01243573;
+                         visit=swh:1:snp:4fc1e36fca86b2070204bedd51106014a614f321;
+                         anchor=swh:1:rev:9c5de20cfb54682370a398fcc733e829903c8cba;
+                         path=/moranegg-AffectationRO-df7f68b/"
+      />
+    </swh:reference>
+  </swh:deposit>
+
+
 The value of the ``swhid`` attribute must be a `SWHID <persistent-identifiers>`,
 with any context qualifiers in this list: