List without a key specified

The following example shows a selection node that is a list and does not have a key specified.

     <?xml version="1.0" encoding="UTF-8"?>
     <rpc message-id="101" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
         <get-config>
             <source><running/></source>
             <filter>
                 <configure xmlns="urn:nokia.com:sros:ns:yang:sr:conf">
                     <router>
                         <interface>
                         </interface>
                     </router>
                 </configure>
             </filter>
         </get-config>
     </rpc>
     ]]>]]>