MMBase

  <mm:formatter xslt="xslt/2xhtml.xslt" escape="links">
      <mm:param name="popupwidth" value="${empty popupwidth ? -1 : popupwidth}" /><!-- default is 'no popups' -->
      <c:if test="${empty depth || depth gt 0}">
        <mm:listrelationscontainer role="idrel" searchdir="destination">
          <mm:listrelations>
            <mm:relatednode>
              <c:if test="${empty depth || depth gt 1}">
                <mm:listrelations role="idrel" searchdir="destination">
                  <mm:relatednode>
                    <mm:nodeinfo type="nodemanager">
                      <mm:compare value="blocks">
                        <mm:listrelations type="object" role="idrel" searchdir="destination" >
                          <mm:relatednode />
                        </mm:listrelations>
                      </mm:compare>
                    </mm:nodeinfo>
                  </mm:relatednode>
                </mm:listrelations>
              </c:if>
          </mm:relatednode>
          </mm:listrelations>
        </mm:listrelationscontainer>
      </c:if>



though only one field was required, all fields are filled.