"receiptDate" optional

templates/xml/core_data.xml

@@ -28,10 +28,12 @@
           </dcc:description>          
         </dcc:identification>
         {% endfor -%}
-      </dcc:identifications>         
-      <dcc:receiptDate>
+      </dcc:identifications>
+      {%- if x.receiptDate %}         
+      <dcc:receiptDate> <hugo
         {{x.receiptDate}}
       </dcc:receiptDate>
+      {% endif -%}
       <dcc:beginPerformanceDate>
         {{x.beginPerformanceDate}}
       </dcc:beginPerformanceDate>