I want to know how to input instance-identifier

Quick example added to the examples.confd/netconf_notifications example using the built in NETCONF stream instead of your proprietary one:

$ diff -u notifier_builtin_replay_store.bak notifier_builtin_replay_store.c 
--- notifier_builtin_replay_store.bak	2017-11-29 11:01:50.000000000 +0100
+++ notifier_builtin_replay_store.c	2017-11-29 11:02:30.000000000 +0100
@@ -14,14 +14,16 @@
 
 #include <confd_lib.h>
 #include <confd_dp.h>
+#include <confd_maapi.h>
 
 #include "notif.h"
+#include "ietf-netconf-notifications.h"
 
 #define OK(val) (assert((val) == CONFD_OK))
 
 static int ctlsock, workersock;
 static struct confd_daemon_ctx *dctx;
-static struct confd_notification_ctx *live_ctx;
+static struct confd_notification_ctx *live_ctx, *netconf_ctx;
 
 static int get_ctlsock(struct addrinfo *addr)
 {
@@ -73,6 +75,14 @@
     datetime->min = tm.tm_min;
 }
 
+static void send_netconf_notification(confd_tag_value_t *vals, int nvals)
+{
+    struct confd_datetime eventTime;
+
+    getdatetime(&eventTime);
+    OK(confd_notification_send(netconf_ctx, &eventTime, vals, nvals));
+}
+
 static void send_notification(confd_tag_value_t *vals, int nvals)
 {
     struct confd_datetime eventTime;
@@ -81,6 +91,41 @@
     OK(confd_notification_send(live_ctx, &eventTime, vals, nvals));
 }
 
+static void send_x(void)
+{
+    confd_tag_value_t vals[11];
+    int i = 0;
+
+    confd_hkeypath_t *kp;
+    struct sockaddr_in saddr;
+    struct in_addr an_addr = {0xa0a0a0a0};
+
+    int msock;
+
+    saddr.sin_addr.s_addr = inet_addr("127.0.0.1");
+    saddr.sin_family = AF_INET;
+    saddr.sin_port = htons(CONFD_PORT);
+
+    msock = socket(PF_INET, SOCK_STREAM, 0);
+    maapi_connect(msock, (struct sockaddr *)&saddr, sizeof(saddr));
+    maapi_xpath2kpath(msock, "/managed-element/enb-function/active-queue-management[aqm-index=0]", &kp);
+    maapi_close(msock);
+
+    CONFD_SET_TAG_XMLBEGIN(&vals[i], ncn_netconf_config_change, ncn__ns); i++;
+    CONFD_SET_TAG_XMLBEGIN(&vals[i], ncn_changed_by, ncn__ns); i++;
+    CONFD_SET_TAG_STR(&vals[i], ncn_username, "admin"); i++;
+    CONFD_SET_TAG_UINT32(&vals[i], ncn_session_id, 0); i++;
+    CONFD_SET_TAG_IPV4(&vals[i], ncn_source_host, an_addr); i++;
+    CONFD_SET_TAG_XMLEND(&vals[i], ncn_changed_by, ncn__ns); i++;
+    CONFD_SET_TAG_ENUM_VALUE(&vals[i], ncn_datastore, ncn_running); i++;
+    CONFD_SET_TAG_XMLBEGIN(&vals[i], ncn_edit, ncn__ns); i++;
+    CONFD_SET_TAG_OBJECTREF(&vals[i],  ncn_target,                kp); i++;
+    CONFD_SET_TAG_XMLEND(&vals[i],     ncn_edit,                  ncn__ns); i++;
+    CONFD_SET_TAG_XMLEND(&vals[i],     ncn_netconf_config_change, ncn__ns); i++;
+
+    send_netconf_notification(vals, i);
+    confd_free_hkeypath(kp);
+}
+
 static void send_notifup_1(int index, int flags1, int flags2)
 {
     confd_tag_value_t vals[9];
@@ -238,6 +283,16 @@
     if (confd_register_notification_stream(dctx, &ncb, &live_ctx) != CONFD_OK) {
         confd_fatal("Couldn't register stream %s\n", ncb.streamname);
     }
+
+    memset(&ncb, 0, sizeof(ncb));
+    ncb.fd = workersock;
+    ncb.get_log_times = NULL;
+    ncb.replay = NULL;
+    strcpy(ncb.streamname, "NETCONF");
+    ncb.cb_opaque = NULL;
+    if (confd_register_notification_stream(dctx, &ncb, &netconf_ctx) != CONFD_OK) {
+        confd_fatal("Couldn't register stream %s\n", ncb.streamname);
+    }
     if (confd_register_done(dctx) != CONFD_OK) {
         confd_fatal("Failed to complete registration \n");
     }
@@ -291,6 +346,9 @@
                     printf("sending linkDown notification\n");
                     send_notifdown(1);
                     break;
+	        case 'x':
+	 	    send_x();
+		    break;
                 case 'm':
                     printf("sending 10000 random notifications\n");
                     int i;
$ diff -u Makefile.bak Makefile
--- Makefile.bak	2017-11-29 11:03:12.000000000 +0100
+++ Makefile	2017-11-29 11:10:10.000000000 +0100
@@ -43,15 +43,17 @@
 all: notifier notifier_builtin_replay_store notif.fxs $(CDB_DIR) ssh-keydir
 	@echo "Build complete"
 
+ietf-netconf-notifications.h:
+	$(CONFDC) --emit-h ietf-netconf-notifications.h $(CONFD_DIR)/etc/confd/ietf-netconf-notifications.fxs
 notifier: notifier.o
 	 $(CC) notifier.o $(LIBS) $(CFLAGS) -ansi -pedantic -o $@
 
-notifier.o: notifier.c notif.h
+notifier.o: notifier.c notif.h ietf-netconf-notifications.h
 
 notifier_builtin_replay_store: notifier_builtin_replay_store.o
 	 $(CC) notifier_builtin_replay_store.o $(LIBS) $(CFLAGS) -o $@
 
-notifier_builtin_replay_store.o: notifier_builtin_replay_store.c notif.h
+notifier_builtin_replay_store.o: notifier_builtin_replay_store.c notif.h ietf-netconf-notifications.h
 
$ diff -u notif.yang.bak notif.yang 
--- notif.yang.bak	2017-11-29 11:08:24.000000000 +0100
+++ notif.yang	2017-11-29 09:48:11.000000000 +0100
@@ -14,6 +14,24 @@
     }
   }
 
+container managed-element {
+ container enb-function {
+   list active-queue-management{
+       key aqm-index;   
+       leaf aqm-index{
+            type uint16{
+                range "0..7";
+            }
+       }
+       leaf qci{
+            type uint16 {
+                range "0..7";
+            }
+       }
+   }
+ }
+}
+
   notification linkUp {
     leaf ifIndex {
       type leafref {