Internet-Draft YANG Notifications Filtering October 2025
Yan, et al. Expires 20 April 2026 [Page]
Workgroup:
Network Working Group
Internet-Draft:
draft-yan-netconf-yang-push-notif-filter-00
Published:
Intended Status:
Standards Track
Expires:
Authors:
J. Yan
ZTE Corporation
C. Gu
ZTE Corporation
R. Jia
ZTE Corporation
Y. Li
ZTE Corporation
R. Chen
ZTE Corporation

Filter of Configuration Change Notifications

Abstract

This document extends the YANG-Push notification subscription mechanism for on-change to reduce unnecessary reporting after an on-change YANG-Push notification is generated.

Requirements Language

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.

Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."

This Internet-Draft will expire on 20 April 2026.

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Table of Contents

1. Introduction

According to the YANG PUSH protocol, once the subscriber subscribes to notifications of data store changes, the NETCONF server will report notifications according to the push-change-update notification format defined in the YANG PUSH protocol ([RFC8641]) as soon as changes in the data store are detected.

Even if the change is caused by this subscriber, the notification will be reported. The subscriber MAY not want to receive the notificaton.To filter out push-change-update notifications originating from this subscriber, a subscription method that supports filter local push-change-update notifications based on the subscription rules needs to be provided. This capability enables the filtering of on-change YANG-Push notifications according to the subscription rules.

This specification applies to the YANG push dynamic Subscriptions defined in Section 2.4 of [RFC8639]. As defined in Section 2.4 of [RFC8639], the subscriber can create a dynamic subscription using establish-subscription, and change an existing dynamic subscription using modify-subscription.

As described in Section 3.5.2 of [RFC8641], if the update-trigger is set to on-change, the NETCONF server will report notifications according to the push-change-update notification format defined in the YANG PUSH protocol ([RFC8641]) as soon as changes in the data store are detected. However, if these changes are caused by the subscriber itself, the subscriber already holds these changes and does not need to receive additional Yang-Push notifications from the publisher.

This document extends the current on-change YANG-Push notification subscription mechanism to reduce unnecessary reports after on-change YANG-Push notifications are generated.

2. Extend the On-change Update-trigger

The YANG notifications subscription OPTIONALLY can be restricted to the following YANG module augment

excluded-self-change:
Used to restrict a push-change-update notification that was triggered by the subscriber itself if need report to subscriber.

When a NETCONF client uses the RPC establish-subscription to create a subscription, if you want to filter out data store change notifications caused by the RPC operations of this client, you can specify excluded-self-change as enable.

When a NETCONF client uses the RPC modify-subscription to modify the subscription, if you want to change it to filter out, specify excluded-self-change as enable; if you want to change it to not filter out, specify excluded-self-change as disable.

Figure 1 provides an example of a "establish-subscription" RPC call with excluded-self-change and datastore-xpath-filter for on-change subscription. Figure 2shows the response when the RPC has been accepted by the NETCONF server. Figure 3 provides an example of a "modify-subscription" RPC call with excluded-self-change for on-change subscription.

<rpc message-id="101"
     xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
   <establish-subscription
    xmlns="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications"
    xmlns:yp="urn:ietf:params:xml:ns:yang:ietf-yang-push">
    xmlns:ypf="urn:ietf:params:xml:ns:yang:ietf-yang-push-noti-filter">
     <yp:datastore
          xmlns:ds="urn:ietf:params:xml:ns:yang:ietf-datastores">
       ds:running
     </yp:datastore>
     <yp:datastore-xpath-filter
         xmlns:ex="https://example.com/sample-data/1.0">
       /ex:foo
     </yp:datastore-xpath-filter>
     <yp:on-change>
       <ypf:excluded-self-change>enable</ypf:excluded-self-change>
     </yp:on-change>
   </establish-subscription>
 </rpc>
Figure 1: RPC Example for an establish-subscription 
<rpc-reply message-id="101"
   xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <id
    xmlns="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications">
      1011
  </id>
</rpc-reply>
Figure 2: RPC Example for establish-subscription response 
<rpc message-id="102"
      xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <modify-subscription
         xmlns=
            "urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications"
         xmlns:yp="urn:ietf:params:xml:ns:yang:ietf-yang-push">
    <id>1011</id>
      <yp:on-change>
        <ypf:excluded-self-change>disable</ypf:excluded-self-change>
      </yp:on-change>
  </modify-subscription>
</rpc>
Figure 3: RPC Example for an modify-subscription

3. The "ietf-yang-push-noti-filter" Module

3.1. Data Model Overview

This YANG module extends the "ietf-yang-push" module and the "ietf-subscribed-notifications" module by defining "excluded-self-change" in the "establish-subscription" and "modify-subscription" RPCs for data store push subscription

3.1.1. Tree View

The following is the YANG tree diagram [RFC8340] for the ietf-yang-push-noti-filter YANG module

module: ietf-yang-push-noti-filter
  augment /sn:establish-subscription/sn:input/yp:update-trigger/yp:on-change:
     +-- excluded-self-change?   enumeration
  augment /sn:modify-subscription/sn:input/yp:update-trigger/yp:on-change:
     +-- excluded-self-change?   enumeration

3.1.2. Full Tree View

The following is the YANG tree diagram [RFC8340] for the the ietf-yang-push-noti-filter augmentation within the ietf-subscribed-notifications, including the RPCs and notifications.

  module: ietf-subscribed-notifications
    +--ro streams
    |  +--ro stream* [name]
    |     +--ro name                       string
    |     +--ro description?               string
    |     +--ro replay-support?            empty {replay}?
    |     +--ro replay-log-creation-time   yang:date-and-time {replay}?
    |     +--ro replay-log-aged-time?      yang:date-and-time {replay}?
    +--rw filters
    |  +--rw stream-filter* [name]
    |  |  +--rw name                           string
    |  |  +--rw (filter-spec)?
    |  |     +--:(stream-subtree-filter)
    |  |     |  +--rw stream-subtree-filter?   <anydata> {subtree}?
    |  |     +--:(stream-xpath-filter)
    |  |        +--rw stream-xpath-filter?     yang:xpath1.0 {xpath}?
    |  +--rw yp:selection-filter* [filter-id]
    |     +--rw yp:filter-id                         string
    |     +--rw (yp:filter-spec)?
    |        +--:(yp:datastore-subtree-filter)
    |        |  +--rw yp:datastore-subtree-filter?   <anydata>
    |        |          {sn:subtree}?
    |        +--:(yp:datastore-xpath-filter)
    |           +--rw yp:datastore-xpath-filter?     yang:xpath1.0
    |                   {sn:xpath}?
    +--rw subscriptions
      +--rw subscription* [id]
        +--rw id
        |       subscription-id
        +--rw (target)
        |  +--:(stream)
        |  |  +--rw (stream-filter)?
        |  |  |  +--:(by-reference)
        |  |  |  |  +--rw stream-filter-name
        |  |  |  |          stream-filter-ref
        |  |  |  +--:(within-subscription)
        |  |  |     +--rw (filter-spec)?
        |  |  |        +--:(stream-subtree-filter)
        |  |  |        |  +--rw stream-subtree-filter?
        |  |  |        |          <anydata> {subtree}?
        |  |  |        +--:(stream-xpath-filter)
        |  |  |           +--rw stream-xpath-filter?
        |  |  |                   yang:xpath1.0 {xpath}?
        |  |  +--rw stream
        |  |  |       stream-ref
        |  |  +--ro replay-start-time?
        |  |  |       yang:date-and-time {replay}?
        |  |  +--rw configured-replay?                         empty
        |  |          {configured,replay}?
        |  +--:(yp:datastore)
        |     +--rw yp:datastore
        |     |       identityref
        |     +--rw (yp:selection-filter)?
        |        +--:(yp:by-reference)
        |        |  +--rw yp:selection-filter-ref
        |        |          selection-filter-ref
        |        +--:(yp:within-subscription)
        |           +--rw (yp:filter-spec)?
        |              +--:(yp:datastore-subtree-filter)
        |              |  +--rw yp:datastore-subtree-filter?
        |              |          <anydata> {sn:subtree}?
        |              +--:(yp:datastore-xpath-filter)
        |                 +--rw yp:datastore-xpath-filter?
        |                         yang:xpath1.0 {sn:xpath}?
        +--rw stop-time?
        |       yang:date-and-time
        +--rw dscp?
        |       inet:dscp {dscp}?
        +--rw weighting?                                       uint8
        |       {qos}?
        +--rw dependency?
        |       subscription-id {qos}?
        +--rw transport?
        |       transport {configured}?
        +--rw encoding?
        |       encoding
        +--rw purpose?                                         string
        |       {configured}?
        +--rw (notification-message-origin)? {configured}?
        |  +--:(interface-originated)
        |  |  +--rw source-interface?
        |  |          if:interface-ref {interface-designation}?
        |  +--:(address-originated)
        |     +--rw source-vrf?
        |     |       -> /ni:network-instances/network-instance/name
        |     |       {supports-vrf}?
        |     +--rw source-address?
        |             inet:ip-address-no-zone
        +--ro configured-subscription-state?
        |       enumeration {configured}?
        +--rw receivers
        |  +--rw receiver* [name]
        |     +--rw name                      string
        |     +--ro sent-event-records?
        |     |       yang:zero-based-counter64
        |     +--ro excluded-event-records?
        |     |       yang:zero-based-counter64
        |     +--ro state                     enumeration
        |     +---x reset {configured}?
        |        +--ro output
        |           +--ro time    yang:date-and-time
        +--rw (yp:update-trigger)?
           +--:(yp:periodic)
           |  +--rw yp:periodic!
           |     +--rw yp:period         centiseconds
           |     +--rw yp:anchor-time?   yang:date-and-time
           +--:(yp:on-change) {on-change}?
              +--rw yp:on-change!
                   +--rw yp:dampening-period?   centiseconds
                   +--rw yp:sync-on-start?      boolean
                   +--rw yp:excluded-change*    change-type

    rpcs:
      +---x establish-subscription
      |  +---w input
      |  |  +---w (target)
      |  |  |  +--:(stream)
      |  |  |  |  +---w (stream-filter)?
      |  |  |  |  |  +--:(by-reference)
      |  |  |  |  |  |  +---w stream-filter-name
      |  |  |  |  |  |          stream-filter-ref
      |  |  |  |  |  +--:(within-subscription)
      |  |  |  |  |     +---w (filter-spec)?
      |  |  |  |  |        +--:(stream-subtree-filter)
      |  |  |  |  |        |  +---w stream-subtree-filter?
      |  |  |  |  |        |          <anydata> {subtree}?
      |  |  |  |  |        +--:(stream-xpath-filter)
      |  |  |  |  |           +---w stream-xpath-filter?
      |  |  |  |  |                   yang:xpath1.0 {xpath}?
      |  |  |  |  +---w stream
      |  |  |  |  |       stream-ref
      |  |  |  |  +---w replay-start-time?
      |  |  |  |          yang:date-and-time {replay}?
      |  |  |  +--:(yp:datastore)
      |  |  |     +---w yp:datastore
      |  |  |     |       identityref
      |  |  |     +---w (yp:selection-filter)?
      |  |  |        +--:(yp:by-reference)
      |  |  |        |  +---w yp:selection-filter-ref
      |  |  |        |          selection-filter-ref
      |  |  |        +--:(yp:within-subscription)
      |  |  |           +---w (yp:filter-spec)?
      |  |  |              +--:(yp:datastore-subtree-filter)
      |  |  |              |  +---w yp:datastore-subtree-filter?
      |  |  |              |          <anydata> {sn:subtree}?
      |  |  |              +--:(yp:datastore-xpath-filter)
      |  |  |                 +---w yp:datastore-xpath-filter?
      |  |  |                         yang:xpath1.0 {sn:xpath}?
      |  |  +---w stop-time?
      |  |  |       yang:date-and-time
      |  |  +---w dscp?
      |  |  |       inet:dscp {dscp}?
      |  |  +---w weighting?                                       uint8
      |  |  |       {qos}?
      |  |  +---w dependency?
      |  |  |       subscription-id {qos}?
      |  |  +---w encoding?
      |  |  |       encoding
      |  |  +---w (yp:update-trigger)?
      |  |     +--:(yp:periodic)
      |  |     |  +---w yp:periodic!
      |  |     |     +---w yp:period         centiseconds
      |  |     |     +---w yp:anchor-time?   yang:date-and-time
      |  |     +--:(yp:on-change) {on-change}?
      |  |        +---w yp:on-change!
      |  |           +---w yp:dampening-period?         centiseconds
      |  |           +---w yp:sync-on-start?            boolean
      |  |           +---w yp:excluded-change*          change-type
      |  |           +---w ypf:excluded-self-change*    enumeration
      |  +--ro output
      |     +--ro id                            subscription-id
      |     +--ro replay-start-time-revision?   yang:date-and-time
      |             {replay}?
      +---x modify-subscription
      |  +---w input
      |     +---w id
      |     |       subscription-id
      |     +---w (target)
      |     |  +--:(stream)
      |     |  |  +---w (stream-filter)?
      |     |  |     +--:(by-reference)
      |     |  |     |  +---w stream-filter-name
      |     |  |     |          stream-filter-ref
      |     |  |     +--:(within-subscription)
      |     |  |        +---w (filter-spec)?
      |     |  |           +--:(stream-subtree-filter)
      |     |  |           |  +---w stream-subtree-filter?
      |     |  |           |          <anydata> {subtree}?
      |     |  |           +--:(stream-xpath-filter)
      |     |  |              +---w stream-xpath-filter?
      |     |  |                      yang:xpath1.0 {xpath}?
      |     |  +--:(yp:datastore)
      |     |     +---w yp:datastore
      |     |     |       identityref
      |     |     +---w (yp:selection-filter)?
      |     |        +--:(yp:by-reference)
      |     |        |  +---w yp:selection-filter-ref
      |     |        |          selection-filter-ref
      |     |        +--:(yp:within-subscription)
      |     |           +---w (yp:filter-spec)?
      |     |              +--:(yp:datastore-subtree-filter)
      |     |              |  +---w yp:datastore-subtree-filter?
      |     |              |          <anydata> {sn:subtree}?
      |     |              +--:(yp:datastore-xpath-filter)
      |     |                 +---w yp:datastore-xpath-filter?
      |     |                         yang:xpath1.0 {sn:xpath}?
      |     +---w stop-time?
      |     |       yang:date-and-time
      |     +---w (yp:update-trigger)?
      |        +--:(yp:periodic)
      |        |  +---w yp:periodic!
      |        |     +---w yp:period         centiseconds
      |        |     +---w yp:anchor-time?   yang:date-and-time
      |        +--:(yp:on-change) {on-change}?
      |           +---w yp:on-change!
      |              +---w yp:dampening-period?         centiseconds
      |              +---w ypf:excluded-self-change*    enumeration
      +---x delete-subscription
      |  +---w input
      |     +---w id    subscription-id
      +---x kill-subscription
         +---w input
            +---w id    subscription-id

    notifications:
      +---n replay-completed {replay}?
      |  +--ro id    subscription-id
      +---n subscription-completed {configured}?
      |  +--ro id    subscription-id
      +---n subscription-modified
      |  +--ro id
      |  |       subscription-id
      |  +--ro (target)
      |  |  +--:(stream)
      |  |  |  +--ro (stream-filter)?
      |  |  |  |  +--:(by-reference)
      |  |  |  |  |  +--ro stream-filter-name
      |  |  |  |  |          stream-filter-ref
      |  |  |  |  +--:(within-subscription)
      |  |  |  |     +--ro (filter-spec)?
      |  |  |  |        +--:(stream-subtree-filter)
      |  |  |  |        |  +--ro stream-subtree-filter?
      |  |  |  |        |          <anydata> {subtree}?
      |  |  |  |        +--:(stream-xpath-filter)
      |  |  |  |           +--ro stream-xpath-filter?
      |  |  |  |                   yang:xpath1.0 {xpath}?
      |  |  |  +--ro stream
      |  |  |  |       stream-ref
      |  |  |  +--ro replay-start-time?
      |  |  |          yang:date-and-time {replay}?
      |  |  +--:(yp:datastore)
      |  |     +--ro yp:datastore
      |  |     |       identityref
      |  |     +--ro (yp:selection-filter)?
      |  |        +--:(yp:by-reference)
      |  |        |  +--ro yp:selection-filter-ref
      |  |        |          selection-filter-ref
      |  |        +--:(yp:within-subscription)
      |  |           +--ro (yp:filter-spec)?
      |  |              +--:(yp:datastore-subtree-filter)
      |  |              |  +--ro yp:datastore-subtree-filter?
      |  |              |          <anydata> {sn:subtree}?
      |  |              +--:(yp:datastore-xpath-filter)
      |  |                 +--ro yp:datastore-xpath-filter?
      |  |                         yang:xpath1.0 {sn:xpath}?
      |  +--ro stop-time?
      |  |       yang:date-and-time
      |  +--ro dscp?
      |  |       inet:dscp {dscp}?
      |  +--ro weighting?                                       uint8
      |  |       {qos}?
      |  +--ro dependency?
      |  |       subscription-id {qos}?
      |  +--ro transport?
      |  |       transport {configured}?
      |  +--ro encoding?                                        encoding
      |  +--ro purpose?                                         string
      |  |       {configured}?
      |  +--ro (yp:update-trigger)?
      |     +--:(yp:periodic)
      |     |  +--ro yp:periodic!
      |     |     +--ro yp:period         centiseconds
      |     |     +--ro yp:anchor-time?   yang:date-and-time
      |     +--:(yp:on-change) {on-change}?
      |        +--ro yp:on-change!
      |           +--ro yp:dampening-period?   centiseconds
      |           +--ro yp:sync-on-start?      boolean
      |           +--ro yp:excluded-change*    change-type
      +---n subscription-resumed
      |  +--ro id    subscription-id
      +---n subscription-started {configured}?
      |  +--ro id
      |  |       subscription-id
      |  +--ro (target)
      |  |  +--:(stream)
      |  |  |  +--ro (stream-filter)?
      |  |  |  |  +--:(by-reference)
      |  |  |  |  |  +--ro stream-filter-name
      |  |  |  |  |          stream-filter-ref
      |  |  |  |  +--:(within-subscription)
      |  |  |  |     +--ro (filter-spec)?
      |  |  |  |        +--:(stream-subtree-filter)
      |  |  |  |        |  +--ro stream-subtree-filter?
      |  |  |  |        |          <anydata> {subtree}?
      |  |  |  |        +--:(stream-xpath-filter)
      |  |  |  |           +--ro stream-xpath-filter?
      |  |  |  |                   yang:xpath1.0 {xpath}?
      |  |  |  +--ro stream
      |  |  |  |       stream-ref
      |  |  |  +--ro replay-start-time?
      |  |  |  |       yang:date-and-time {replay}?
      |  |  |  +--ro replay-previous-event-time?
      |  |  |          yang:date-and-time {replay}?
      |  |  +--:(yp:datastore)
      |  |     +--ro yp:datastore
      |  |     |       identityref
      |  |     +--ro (yp:selection-filter)?
      |  |        +--:(yp:by-reference)
      |  |        |  +--ro yp:selection-filter-ref
      |  |        |          selection-filter-ref
      |  |        +--:(yp:within-subscription)
      |  |           +--ro (yp:filter-spec)?
      |  |              +--:(yp:datastore-subtree-filter)
      |  |              |  +--ro yp:datastore-subtree-filter?
      |  |              |          <anydata> {sn:subtree}?
      |  |              +--:(yp:datastore-xpath-filter)
      |  |                 +--ro yp:datastore-xpath-filter?
      |  |                         yang:xpath1.0 {sn:xpath}?
      |  +--ro stop-time?
      |  |       yang:date-and-time
      |  +--ro dscp?
      |  |       inet:dscp {dscp}?
      |  +--ro weighting?                                       uint8
      |  |       {qos}?
      |  +--ro dependency?
      |  |       subscription-id {qos}?
      |  +--ro transport?
      |  |       transport {configured}?
      |  +--ro encoding?                                        encoding
      |  +--ro purpose?                                         string
      |  |       {configured}?
      |  +--ro (yp:update-trigger)?
      |     +--:(yp:periodic)
      |     |  +--ro yp:periodic!
      |     |     +--ro yp:period         centiseconds
      |     |     +--ro yp:anchor-time?   yang:date-and-time
      |     +--:(yp:on-change) {on-change}?
      |        +--ro yp:on-change!
      |           +--ro yp:dampening-period?   centiseconds
      |           +--ro yp:sync-on-start?      boolean
      |           +--ro yp:excluded-change*    change-type
      +---n subscription-suspended
      |  +--ro id        subscription-id
      |  +--ro reason    identityref
      +---n subscription-terminated
         +--ro id        subscription-id
         +--ro reason    identityref

3.2. YANG Module

The YANG module has two leaves augmenting the model of Subscription to YANG Notifications [RFC8639] and Subscription to YANG Notifications for Datastore Updates [RFC8641].

<CODE BEGINS> file "ietf-yang-push-noti-filter@2024-05-31.yang"

module ietf-yang-push-noti-filter {
  yang-version 1.1;
  namespace "urn:ietf:params:xml:ns:yang:ietf-yang-push-noti-filter";
  prefix ypf;
  import ietf-subscribed-notifications {
    prefix sn;
  }
  import ietf-yang-push {
    prefix yp;
    revision-date 2019-09-09;
  }

  organization "IETF NETCONF(Network Configuration) Working Group";
  contact
    "ZTE Corporation &#xD;
      Nanjing Institute of ZTE Corporation&#xD;
      &#xD;
      No.68 Zijinghua Rd. Yuhuatai District, Nanjing, China&#xD;
      &#xD;
      Tel: +86-25-52870000";

  description
    "This module augments the YANG push subscription RPCs.

     Copyright (c) 2023 IETF Trust and the persons identified as
     authors of the code.  All rights reserved.

     Redistribution and use in source and binary forms, with or
     without modification, is permitted pursuant to, and subject to
     the license terms contained in, the Simplified BSD License set
     forth in Section 4.c of the IETF Trust's Legal Provisions
     Relating to IETF Documents(https://trustee.ietf.org/license-info).

     This version of this YANG module is part of RFC XXXX; see the
     RFC itself for full legal notices.";

  revision 2024-05-31 {
    description
      "First revision";
    reference
      "RFC XXXX: Filter of Configuration Change Notifications
       Subscription";
  }

  augment "/sn:establish-subscription/sn:input/yp:update-trigger/" +
            "yp:on-change/yp:on-change" {
    leaf excluded-self-change {
      type enumeration {
        enum enable {
          description
            "Enable excluded-self-change.";
        }
        enum disable {
          description
            "Disable excluded-self-change.";
        }
      }
      description
        "Used to restrict a push-change-update notification that
        triggered by the subscriber self if need report to
        subscriber.";
    }

    description
      "This augmentation adds additional subscription parameters to
       the establish-subscription RPC.";
  }

  augment "/sn:modify-subscription/sn:input/yp:update-trigger/" +
            "yp:on-change/yp:on-change" {
    leaf excluded-self-change {
      type enumeration {
        enum enable {
          description
            "Enable excluded-self-change.";
        }
        enum disable {
          description
            "Disable excluded-self-change.";
        }
      }

      description
        "Used to restrict a push-change-update notification that
         triggered by the subscriber self if need report to subscriber.";
    }
    description
      "This augmentation adds additional subscription parameters to the
       modify-subscription RPC.";
  }
}

<CODE ENDS>

4. IANA Considerations

4.1. IETF XML Registry

This document registers the following URIs in the "IETF XML Registry" [RFC3688]:

  URI: urn:ietf:params:xml:ns:yang:ietf-yang-push-noti-filter
  Registrant Contact: The IESG.
  XML: N/A; the requested URI is an XML namespace.

4.2. YANG Module Name

This document registers the following YANG modules in the "YANG Module Names" registry [RFC6020]:

  name: ietf-yang-push-noti-filter
  namespace: urn:ietf:params:xml:ns:yang:ietf-yang-push-noti-filter
  prefix: ypf
  reference: RFC-to-be

5. Security Considerations

The security considerations for the YANG notifications subscription mechanism are described in [RFC8641]. This documents adds no additional security considerations.

6. References

6.1. Normative References

[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/info/rfc2119>.
[RFC3688]
Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, , <https://www.rfc-editor.org/info/rfc3688>.
[RFC6020]
Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, , <https://www.rfc-editor.org/info/rfc6020>.
[RFC8174]
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <https://www.rfc-editor.org/info/rfc8174>.
[RFC8639]
Voit, E., Clemm, A., Gonzalez Prieto, A., Nilsen-Nygaard, E., and A. Tripathy, "Subscription to YANG Notifications", RFC 8639, DOI 10.17487/RFC8639, , <https://www.rfc-editor.org/info/rfc8639>.
[RFC8641]
Clemm, A. and E. Voit, "Subscription to YANG Notifications for Datastore Updates", RFC 8641, DOI 10.17487/RFC8641, , <https://www.rfc-editor.org/info/rfc8641>.

6.2. Informative References

[RFC8340]
Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, , <https://www.rfc-editor.org/info/rfc8340>.

Authors' Addresses

Jinjie Yan
ZTE Corporation
Nanjing
China
Gu ChunHua
ZTE Corporation
Nanjing
China
Jia Rui
ZTE Corporation
Nanjing
China
Li YunFang
ZTE Corporation
Nanjing
China
Ran Chen
ZTE Corporation
Nanjing
China