</article>
                        {% endfor %}
                </section>
-               {% if keywords_prev is defined or keywords_next is defined %}
+               {% if head.prev is defined or head.next is defined %}
                        <footer>
                                <nav class="pager">
-                                       {% if keywords_prev is defined %}
-                                               <a href="{{ keywords_prev }}" rel="prev">< {% trans %}Previous keywords{% endtrans %}</a>
+                                       {% if head.prev is defined %}
+                                               <a href="{{ head.prev }}" rel="prev">< {% trans %}Previous keywords{% endtrans %}</a>
                                        {% endif %}
-                                       {% if keywords_next is defined %}
-                                               <a href="{{ keywords_next }}" rel="next">{% trans %}Next keywords{% endtrans %} ></a>
+                                       {% if head.next is defined %}
+                                               <a href="{{ head.next }}" rel="next">{% trans %}Next keywords{% endtrans %} ></a>
                                        {% endif %}
                                </nav>
                        </footer>