node_element = sfa_rspec.add_element('node', {'id': 'n'+str(i)}, parent=network_element)
hostname_element = sfa_rspec.add_element('hostname', parent=node_element, text=hostname)
urn_element = sfa_rspec.add_element('urn', parent=node_element, text=urn)
node_element = sfa_rspec.add_element('node', {'id': 'n'+str(i)}, parent=network_element)
hostname_element = sfa_rspec.add_element('hostname', parent=node_element, text=hostname)
urn_element = sfa_rspec.add_element('urn', parent=node_element, text=urn)