User defined Junos telemetry Sensor YANG definition for 'show krt state' from TechPubs at https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/yang-xmlproxy-junos-telemetry-interface-configuring.html

xmlproxyd_krt.yang

/*
 * Example yang for generating OC equivalent of internal meta tree
   save as "xmlproxyd_krtState.yang" on router.
   cli : show krt state
 */

module krtState {
  yang-version 1;

  namespace "http://juniper.net/yang/software";

  prefix "krt";

  import drend {
    prefix dr;
  }

  grouping krt-state-information-grouping {

    list krt-queue-state {
      key "operations-queued";
      dr:source "krt-queue-state";
      leaf operations-queued {
        type uint32;
        dr:source krtq-operations-queued;
      }
      leaf rt-table-adds {
        dr:source krtq-rt-table-adds;
        type uint32;
      }
      leaf interface-routes {
        dr:source krtq-interface-routes;
        type uint32;
      }
      leaf high-multicast-adds-changes {
        dr:source krtq-high-multicast-adds-changes;
        type uint32;
      }
      leaf top-indirect-adds-changes {
        dr:source krtq-top-indirect-adds-changes;
        type uint32;
      }
      leaf indirect-adds-changes {
        dr:source krtq-indirect-adds-changes;
        type uint32;
      }
      leaf indirect-deletes {
        dr:source krtq-indirect-deletes;
        type uint32;
      }
      leaf high-mpls-adds {
        dr:source krtq-high-mpls-adds;
        type uint32;
      }
      leaf high-mpls-changes {
        dr:source krtq-high-mpls-changes;
        type uint32;
      }
      leaf top-priority-adds {
        dr:source krtq-top-priority-adds;
        type uint32;
      }
      leaf top-priority-changes {
        dr:source krtq-top-priority-changes;
        type uint32;
      }
      leaf top-priority-deletes {
        dr:source krtq-top-priority-deletes;
        type uint32;
      }
      leaf high-priority-adds {
        dr:source krtq-high-priority-adds;
        type uint32;
      }
      leaf high-priority-changes {
        dr:source krtq-high-priority-changes;
        type uint32;
      }
      leaf high-priority-deletes {
        dr:source krtq-high-priority-deletes;
        type uint32;
      }
      leaf normal-priority-indirects {
        dr:source krtq-normal-priority-indirects;
        type uint32;
      }
      leaf normal-priority-adds {
        dr:source krtq-normal-priority-adds;
        type uint32;
      }
      leaf normal-priority-changes {
        dr:source krtq-normal-priority-changes;
        type uint32;
      }
      leaf normal-priority-deletes {
        dr:source krtq-normal-priority-deletes;
        type uint32;
      }
      leaf least-priority-adds {
        dr:source krtq-least-priority-adds;
        type uint32;
      }
      leaf least-priority-changes {
        dr:source krtq-least-priority-changes;
        type uint32;
      }
      leaf least-priority-deletes {
        dr:source krtq-least-priority-deletes;
        type uint32;
      }
       leaf normal-priority-cnh-deletes {
        dr:source krtq-normal-priority-cnh-deletes;
        type uint32;
      }
      leaf normal-priority-gmp {
        dr:source krtq-normal-priority-gmp;
        type uint32;
      }
      leaf rt-table-deletes {
        dr:source krtq-rt-table-deletes;
        type uint32;
      }
      leaf operations-deferred {
        dr:source krtq-operations-deferred;
        type uint32;
      }
      leaf operations-canceled {
        dr:source krtq-operations-canceled;
        type uint32;
      }
      leaf async-count {
        dr:source krtq-async-count;
        type uint32;
      }
      leaf async-non-q-count {
        dr:source krtq-async-non-q-count;
        type uint32;
      }
      leaf time-until-next-run {
        dr:source krtq-time-until-next-run;
        type uint32;
      }
       leaf kernel-rt-learnt {
        dr:source krtq-kernel-rt-learnt;
        type uint32;
      }
    }
  }

  dr:command-app "xmlproxyd";
  rpc juniper-netconf-get {
    dr:command-top-of-output "/junos";
    dr:command-full-name "drend juniper-netconf-get";
    dr:cli-command "show krt state";
    dr:command-help "default <get> rpc";
    output {
      container junos {
      container krt-state-information {
        dr:source "/krt-state-information";
        uses krt-state-information-grouping;
      }
    }
   }
  }
}