for node_elem in node_elems:
node = NodeElement(node_elem.attrib, node_elem)
if 'site_id' in node_elem.attrib:
node['authority_id'] = node_elem.attrib['site_id']
# get location
location_elems = node_elem.xpath('./default:location | ./location')
for node_elem in node_elems:
node = NodeElement(node_elem.attrib, node_elem)
if 'site_id' in node_elem.attrib:
node['authority_id'] = node_elem.attrib['site_id']
# get location
location_elems = node_elem.xpath('./default:location | ./location')