<leafNode name="dhcp-interface"> <properties> <help>DHCP interface supplying next-hop IP address</help> <completionHelp> <script>${vyos_completion_dir}/list_interfaces.py</script> </completionHelp> <valueHelp> <format>txt</format> <description>DHCP interface name</description> </valueHelp> <constraint> <validator name="interface-name"/> </constraint> </properties> </leafNode>