OGCRequestDescription rd = this.getRequestDescription(requestName);
if (rd == null)
return null;
OGCOnlineResource ol = rd.getOnlineResouce(protocol, requestMethod);
if (ol == null)
return null;
String strRef = ol.getHref();
if (strRef == null)
return null;
return strRef.trim(); // caution, encountered XML files contain string with space at the end