Package property "reference" is now included in pkg and must not be fetched from extras

ckanext/odsh/templates/package/snippets/info.html

@@ -81,13 +81,12 @@ Example:
             {% endblock license %}
 
 	          {% block musterdatensatz %}
-              {% set musterdatensatzURI = h.odsh_extract_value_from_extras(pkg.extras,'reference') %}
-              {% if musterdatensatzURI %}
+              {% if pkg.reference %}
                 {% set mdk=h.odsh_load_raw_mdk_sample_dataset() %}
-                {% set musterdatensatzName = mdk[musterdatensatzURI] %}
+                {% set musterdatensatzName = mdk[pkg.reference] %}
                 <div class="musterdatensatz-detail info-detail">
                   <div>{{ _('Musterdatensatz') }}</div>
-                  <a href="/dataset?reference={{ musterdatensatzURI }}">{{ musterdatensatzName }}</a>
+                  <a href="/dataset?reference={{ pkg.reference }}">{{ musterdatensatzName }}</a>
                 </div>
               {% endif %}
             {% endblock musterdatensatz %}