diff --git a/docs/gcube-model-facet.rst b/docs/gcube-model-facet.rst
index 9e26dea..23e1756 100644
--- a/docs/gcube-model-facet.rst
+++ b/docs/gcube-model-facet.rst
@@ -562,6 +562,8 @@ ProvenanceFacet captures information on provenance/lineage of the entire resourc
 	+-----------------+--------------+------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------+----------------------------------------------------+
 	| document        | ValueSchema  | ``Mandatory:false`` ``ReadOnly:false`` ``NotNull:false``                                             | Provenance Document, e.g., an XML according to the reference schema.                                                      |
 	+-----------------+--------------+------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------+----------------------------------------------------+
+	| reference       | String       | ``Mandatory:false`` ``ReadOnly:false`` ``NotNull:false``                                             | The ID of the referenced resource.                                                                                        |
+	+-----------------+--------------+------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------+----------------------------------------------------+
 	| **Known Usage**                                                                                                                                                                                                                                                   |
 	+-----------------+--------------+------------------------------------------------------------------------------------------------------+----------------------------------------------------------------------+----------------------------------------------------+
 	| **Source**      | **Relation** | **Multiplicity**                                                                                     | **Target**                                                           | **Description**                                    |