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draft-ietf-netconf-yang-notifications-versioning-07.xml
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<?xml version="1.0" encoding="US-ASCII"?>
<!DOCTYPE rfc SYSTEM "rfc2629.dtd">
<?rfc toc="yes"?>
<?rfc tocompact="yes"?>
<?rfc tocdepth="2"?>
<?rfc tocindent="yes"?>
<?rfc symrefs="yes"?>
<?rfc sortrefs="yes"?>
<?rfc comments="yes"?>
<?rfc inline="yes"?>
<?rfc compact="yes"?>
<?rfc subcompact="no"?>
<rfc category="std"
docName="draft-ietf-netconf-yang-notifications-versioning-07"
ipr="trust200902">
<front>
<title abbrev="YANG Notifications Versioning">Support of Versioning in
YANG Notifications Subscription</title>
<author fullname="Thomas Graf" initials="T" surname="Graf">
<organization>Swisscom</organization>
<address>
<postal>
<street>Binzring 17</street>
<city>Zurich</city>
<code>8045</code>
<country>Switzerland</country>
</postal>
<email>[email protected]</email>
</address>
</author>
<author fullname="Benoit Claise" initials="B" surname="Claise">
<organization>Huawei</organization>
<address>
<email>[email protected]</email>
</address>
</author>
<author fullname="Alex Huang Feng" initials="A." surname="Huang Feng">
<organization>INSA-Lyon</organization>
<address>
<postal>
<street/>
<city>Lyon</city>
<region/>
<code/>
<country>France</country>
</postal>
<phone/>
<facsimile/>
<email>[email protected]</email>
<uri/>
</address>
</author>
<date day="17" month="January" year="2025"/>
<abstract>
<t>This document extends the YANG notifications subscription mechanism
to specify the YANG module semantic version at the subscription. Then, a
new extension with the revision and the semantic version of the YANG
push subscription state change notification is proposed.</t>
</abstract>
</front>
<middle>
<section anchor="Introduction" title="Introduction">
<t>In order to process the newly received YANG push notification
messages described in section 3.7 of <xref target="RFC8641"/> without
querying the Publisher IETF-YANG-LIBRARY each time to understand whether
the YANG module(s) semantic has changed at the YANG push receiver, a
semantic reference to the YANG module and the XPath or subtree is needed
to determine the data types for each field and which part of the YANG
module the metrics are expose from.</t>
<t>This specification applies to the YANG push configured subscriptions
defined in Section 2.5 of <xref target="RFC8639"/>, where a publisher is
configured to stream notification out of band, as opposed to dynamic
subscriptions defined in Section 2.4 of <xref target="RFC8639"/>, where
the subscriber can initiate and modify the subscription dynamically
in-band. In the latter case, the subscriber knows already all the
subscriber YANG-related information, which it has to know in order to
configure the subscription.</t>
<t>This semantic reference is available when the subscription is
established as described in Section 3.6 of <xref target="RFC8641"/> and
being streamed from the publisher to receiver with the subscription
state change notifications described in Section 2.7 of <xref
target="RFC8639"/> where for each subscription a locally unique
subscription ID described in Section 4.3.2 of <xref target="RFC8641"/>
is being issued and streamed as metadata with the notification message
in the YANG push message header.</t>
<t>The semantics can change between different YANG module revisions. The
YANG module version statement is specified in Section 7.1.2 of <xref
target="RFC6020"/> and states that the newer revision needs to be
backward compatible to the previous revision. Section 3.1 of <xref
target="I-D.ietf-netmod-yang-module-versioning"/> specifies that newer
semantic versions introduced in <xref
target="I-D.ietf-netmod-yang-semver"/> MAY not be backward compatible to
the previous version when indicated with non-backwards-compatible
keyword.</t>
<t>The YANG notifications subscription mechanism defined in <xref
target="RFC8641"/> does not allow to specify the YANG module revision.
When a network node is upgraded, the subscribed YANG module revision MAY
have updated and might, consequently, break the data processing pipeline
since the YANG push receiver may not be aware of this change.</t>
<t>This documents extends the current YANG notifications subscription
mechanism to allow to subscribe to a specific revision or latest YANG
module semantic version to which the YANG module version needs to be
backward compatible to.</t>
<t>The subscription state change "subscription-started" and
"subscription-modified" notification messages are also extended to
include the YANG module revision, revision-label, and YANG library
content-id. Changes in the revision and revision-label fields allow a
YANG-Push receiver to detect whenever the subscribed YANG module has
changed. Changes in the yang-library-content-id that YANG module(s) on
the network management server of the YANG-Push publisher has/have
changed.</t>
<section title="Terminology">
<t>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.</t>
<t>The terms "YANG library" and "YANG library content identifier" are
used as defined in <xref target="RFC8525"/>.</t>
</section>
</section>
<section anchor="Datastore-Selection"
title="Extend the Datastore Selection">
<t>The YANG notifications subscription OPTIONALLY can be restricted to
the following YANG module revision for future capabilities:</t>
<dl>
<dt>module:</dt>
<dd>Restricts the subscription to one or more YANG module names with
revision and revision-label together for the related streamed
content.</dd>
</dl>
<dl>
<dt>revision:</dt>
<dd>Restricts the subscription to a specific YANG module revision.
Example: "2014-05-08".</dd>
</dl>
<dl>
<dt>revision-label:</dt>
<dd>Restricts the subscription to the latest compatible YANG module
semantic version referenced to. Example: "2.0.0".</dd>
</dl>
<t>When the NETCONF client creates or modifies the subscription using
the RPCs establish-subscription and modify-subscription and the NETCONF
server does not support the revision, the revision-label or the
combination of revision and revision-label specified in the RPC request,
the NETCONF server MUST return an RPC reply including an
<rpc-error> element as defined in Section 4.3 of <xref
target="RFC6241"/> with the error information populated as follows:</t>
<ul bare="false" empty="false" spacing="normal">
<li>an "error-type" node of "application".</li>
<li>an "error-tag" node whose value is a string that corresponds to an
identity associated with the error.</li>
</ul>
<table align="center" anchor="gen-sub-errors">
<name slugifiedName="name-general-subscription-error-">General
Subscription Error Identities and Associated "error-tag" Use</name>
<thead>
<tr>
<th align="left" colspan="1" rowspan="1">Error identity</th>
<th align="left" colspan="1" rowspan="1">Uses "error-tag"</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" colspan="1" rowspan="1">revision-unsupported</td>
<td align="left" colspan="1" rowspan="1">invalid-value</td>
</tr>
<tr>
<td align="left" colspan="1"
rowspan="1">revision-label-unsupported</td>
<td align="left" colspan="1" rowspan="1">invalid-value</td>
</tr>
<tr>
<td align="left" colspan="1"
rowspan="1">incompatible-revision-and-revision-label</td>
<td align="left" colspan="1" rowspan="1">invalid-value</td>
</tr>
</tbody>
</table>
<t><xref target="subscription_establish_sub_example_xml_fig"/> provides
an example of a "establish-subscription" RPC call with YANG revision and
datastore-xpath-filter for periodical subscription. <xref
target="subscription_establish_sub_positive_response_example_xml_fig"/>
shows the response when the RPC has been accepted by the NETCONF server
and <xref
target="subscription_establish_sub_error_response_example_xml_fig"/> the
error sent by the NETCONF server when the revision is not supported.</t>
<figure anchor="subscription_establish_sub_example_xml_fig"
title="RPC Example for an establish-subscription">
<sourcecode type="xml"><![CDATA[
<netconf:rpc message-id="101"
xmlns:netconf="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:ypr="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
<yp:datastore
xmlns:ds="urn:ietf:params:xml:ns:yang:ietf-datastores">
ds:operational
</yp:datastore>
<yp:datastore-xpath-filter
xmlns:ex="https://example.com/sample-data/1.0">
/ex:foo
</yp:datastore-xpath-filter>
<ypr:module-version>
<ypr:module-name>ex:foo</ypr:module-name>
<ypr:revision>2023-09-17</ypr:revision>
</ypr:module-version>
<yp:periodic>
<yp:period>500</yp:period>
</yp:periodic>
</establish-subscription>
</netconf:rpc>
]]></sourcecode>
</figure>
<figure anchor="subscription_establish_sub_positive_response_example_xml_fig"
title="RPC Example for a positive establish-subscription response">
<sourcecode type="xml"><![CDATA[
<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">
52
</id>
</rpc-reply>
]]></sourcecode>
</figure>
<figure anchor="subscription_establish_sub_error_response_example_xml_fig"
title="RPC Example for an error establish-subscription response">
<sourcecode type="xml"><![CDATA[
<rpc-reply message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"
xmlns:yp="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications">
<rpc-error>
<error-type>application</error-type>
<error-tag>operation-failed</error-tag>
<error-severity>error</error-severity>
<error-path xmlns:ypr="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
<error-info>
<yp:establish-subscription-error-datastore>
<yp:reason xmlns:ypr="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
ypr:revision-unsupported
</yp:reason>
</yp:establish-subscription-error-datastore>
</error-info>
</rpc-error>
</rpc-reply>
]]></sourcecode>
</figure>
</section>
<section anchor="Streaming-Update"
title="Extend the Subscription State Change Notifications">
<t>Besides the Subscription ID and the xpath or sub-tree filter
reference as described in Section 2.7 of <xref target="RFC8639"/>, the
following metadata objects are part of a "subscription-started" or
"subscription-modified" subscription state change notification.</t>
<dl>
<dt>module:</dt>
<dd>Describes the YANG module names for the related streamed
content.</dd>
</dl>
<dl>
<dt>revision:</dt>
<dd>Describes the YANG module revision as specified in Section 7.1.9
of <xref target="RFC6020"/> for the related streamed content.</dd>
</dl>
<dl>
<dt>revision-label:</dt>
<dd>Describes the YANG module semantic version as specified in <xref
target="I-D.ietf-netmod-yang-semver"/> for the related streamed
content.</dd>
</dl>
<dl>
<dt>yang-library-content-id:</dt>
<dd>Contains the YANG library content identifier <xref target="RFC8525"/>
which is an implementation-specific identifier representing
the current information in the YANG library on a specific server.</dd>
</dl>
<t><xref target="subscription_modified_notif_example_xml_fig"/> provides
an example of a "subscription-modified" subscription state change
notification message with the YANG module name, revision, revision label
and datastore-xpath-filter for tracking the operational status of a
single Ethernet interface (per <xref target="RFC8343"/>). This
subscription state change notification message is encoded XML <xref
target="W3C.REC-xml-20081126"/> over the Network Configuration Protocol
(NETCONF) as per <xref target="RFC8640"/>.</t>
<figure anchor="subscription_modified_notif_example_xml_fig"
title="XML Push Example for a subscription-modified notification message">
<sourcecode type="xml"><![CDATA[
<notification xmlns="urn:ietf:params:xml:ns:netconf:notification:1.0">
<eventTime>2023-01-03T10:00:00Z</eventTime>
<subscription-modified
xmlns="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications">
<id>101</id>
<stream-xpath-filter
xmlns:int="urn:ietf:params:xml:ns:yang:ietf-interfaces">
/int:interfaces
</stream-xpath-filter>
<stream>NETCONF</stream>
<module-version
xmlns="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
<module-name>ietf-interfaces</module-name>
<revision>2018-02-20</revision>
<revision-label>2.0.0</revision-label>
<yang-library-content-id>1</yang-library-content-id>
</module-version>
</subscription-modified>
</notification>
]]></sourcecode>
</figure>
<t><xref target="subscription_modified_notif_example_json_fig"/>
provides an example of a JSON encoded, <xref target="RFC8259"/>,
subscription state change notification message over HTTPS-based <xref
target="I-D.ietf-netconf-https-notif"/> or UDP-based <xref
target="I-D.ietf-netconf-udp-notif"/> transport for the same
subscription.</t>
<figure anchor="subscription_modified_notif_example_json_fig"
title="JSON Push Example for a subscription-modified notification message">
<sourcecode type="json"><![CDATA[
{
"ietf-restconf:notification" : {
"eventTime": "2023-01-03T10:00:00Z",
"ietf-subscribed-notifications:subscription-modified": {
"id": 101,
"stream-xpath-filter": "/ietf-interfaces:interfaces",
"stream": "NETCONF",
"ietf-yang-push-revision:module-version": [{
"module-name": "ietf-interfaces"
"revision": "2018-02-20",
"revision-label": "2.0.0",
"yang-library-content-id": "1",
}],
}
}
}
]]></sourcecode>
</figure>
</section>
<section anchor="YANG-push-revision-discovery" title="Discovering
"ietf-yang-push-revision" Support">
<t>A client can discover the support of 'ietf-yang-push-revision'model through the
capabilities model defined in <xref target="RFC9196"/>. This documents extends the 'ietf-notification-capabilities' model with:</t>
<ul>
<li>A leaf 'yang-push-module-revision-supported', stating that the YANG-Push
subscription state change notifications are extended with revision, revision-label
and yang-library-content-id extensions.</li>
</ul>
<t>The YANG models defined in <xref target="YANG Module"/> augments the
'ietf-notification-capabilities' model with the leaf listed above.</t>
<sourcecode type="yangtree"><![CDATA[
module: ietf-system-capabilities
+--ro system-capabilities
+--ro datastore-capabilities* [datastore]
| +--ro datastore
| | -> /yanglib:yang-library/datastore/name
| +--ro per-node-capabilities* []
| +--ro (node-selection)?
| | +--:(node-selector)
| | +--ro node-selector?
| | nacm:node-instance-identifier
| +--ro notc:subscription-capabilities
| +--ro notc:max-nodes-per-update? uint32
| +--ro notc:periodic-notifications-supported?
| | notification-support
| +--ro (notc:update-period)?
| | +--:(notc:minimum-update-period)
| | | +--ro notc:minimum-update-period? uint32
| | +--:(notc:supported-update-period)
| | +--ro notc:supported-update-period* uint32
| +--ro notc:on-change-supported?
| | notification-support {yp:on-change}?
| +--ro notc:minimum-dampening-period? uint32
| | {yp:on-change}?
| +--ro notc:supported-excluded-change-type* union
| {yp:on-change}?
+--ro notc:subscription-capabilities
+--ro notc:max-nodes-per-update? uint32
+--ro notc:periodic-notifications-supported?
| notification-support
+--ro (notc:update-period)?
| +--:(notc:minimum-update-period)
| | +--ro notc:minimum-update-period? uint32
| +--:(notc:supported-update-period)
| +--ro notc:supported-update-period* uint32
+--ro notc:on-change-supported?
| notification-support {yp:on-change}?
+--ro notc:minimum-dampening-period? uint32
| {yp:on-change}?
+--ro notc:supported-excluded-change-type* union
| {yp:on-change}?
+--ro ypr:yang-push-module-revision-supported? boolean
{yang-push-revision-supported}?
]]></sourcecode>
<t>This model can be retrieved via a NETCONF <get> RPC.</t>
</section>
<section anchor="YANG-push-revision-module"
title="The "ietf-yang-push-revision" Module">
<section anchor="Data Model Overview" title="Data Model Overview">
<t>This YANG module augments the "ietf-yang-push" module with the
module-name, revision, revision-label and yang-library-content-id
in the "subscription-started" and "subscription-modified" subscription
state change notifications and the ability to define the "revision"
and "revision-label" in the "establish-subscription" and
"modify-subscription" RPCs in the datastore push subscription.</t>
<section anchor="Tree View" title="Tree View">
<t>The following is the YANG tree diagram <xref target="RFC8340"/>
for the ietf-yang-push-revision YANG module</t>
<t><sourcecode type="yangtree"><![CDATA[
module: ietf-yang-push-revision
augment /sn:establish-subscription/sn:input:
+---w module-version-config* [module-name]
{yang-push-revision-supported}?
+---w module-name yang:yang-identifier
+---w revision? rev:revision-date
+---w revision-label? ysver:version
augment /sn:modify-subscription/sn:input:
+---w module-version-config* [module-name]
{yang-push-revision-supported}?
+---w module-name yang:yang-identifier
+---w revision? rev:revision-date
+---w revision-label? ysver:version
augment /sn:subscription-started:
+--ro module-version* [module-name]
| {yang-push-revision-supported}?
| +--ro module-name yang:yang-identifier
| +--ro revision rev:revision-date
| +--ro revision-label? ysver:version
+--ro yang-library-content-id? -> /yanglib:yang-library/content-id
{yang-push-revision-supported}?
augment /sn:subscription-modified:
+--ro module-version* [module-name]
| {yang-push-revision-supported}?
| +--ro module-name yang:yang-identifier
| +--ro revision rev:revision-date
| +--ro revision-label? ysver:version
+--ro yang-library-content-id? -> /yanglib:yang-library/content-id
{yang-push-revision-supported}?
augment /sn:subscriptions/sn:subscription:
+--rw module-version-config* [module-name]
{yang-push-revision-supported}?
+--rw module-name yang:yang-identifier
+--rw revision? rev:revision-date
+--rw revision-label? ysver:version
augment /sysc:system-capabilities/notc:subscription-capabilities:
+--ro yang-push-module-revision-supported? boolean
{yang-push-revision-supported}?
]]></sourcecode></t>
</section>
<section anchor="Full Tree View" title="Full Tree View">
<t>The following is the YANG tree diagram <xref target="RFC8340"/>
for the ietf-yang-push-revision augmentation within the
ietf-subscribed-notifications, including the RPCs and
notifications.</t>
<t><sourcecode type="yangtree"><![CDATA[
module: ietf-yang-push
rpcs:
+---x resync-subscription {on-change}?
+---w input
+---w id sn:subscription-id
notifications:
+---n push-update
| +--ro id? sn:subscription-id
| +--ro datastore-contents? <anydata>
| +--ro incomplete-update? empty
+---n push-change-update {on-change}?
+--ro id? sn:subscription-id
+--ro datastore-changes
| +--ro yang-patch
| +--ro patch-id string
| +--ro comment? string
| +--ro edit* [edit-id]
| +--ro edit-id string
| +--ro operation enumeration
| +--ro target target-resource-offset
| +--ro point? target-resource-offset
| +--ro where? enumeration
| +--ro value? <anydata>
+--ro incomplete-update? empty
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 ypr:module-version-config* [module-name]
| {yang-push-revision-supported}?
| +--rw ypr:module-name yang:yang-identifier
| +--rw ypr:revision? rev:revision-date
| +--rw ypr:revision-label? ysver:version
+--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 ypr:module-version-config* [module-name]
| | | {yang-push-revision-supported}?
| | | +---w ypr:module-name yang:yang-identifier
| | | +---w ypr:revision? rev:revision-date
| | | +---w ypr:revision-label? ysver:version
| | +---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
| +--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 ypr:module-version-config* [module-name]
| | {yang-push-revision-supported}?
| | +---w ypr:module-name yang:yang-identifier
| | +---w ypr:revision? rev:revision-date
| | +---w ypr:revision-label? ysver:version
| +---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
+---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 ypr:module-version* [module-name]
| | {yang-push-revision-supported}?
| | +--ro ypr:module-name yang:yang-identifier
| | +--ro ypr:revision rev:revision-date
| | +--ro ypr:revision-label? ysver:version
| +--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 ypr:module-version* [module-name]
| | {yang-push-revision-supported}?
| | +--ro ypr:module-name yang:yang-identifier
| | +--ro ypr:revision rev:revision-date
| | +--ro ypr:revision-label? ysver:version
| +--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
module: ietf-system-capabilities
+--ro system-capabilities
+--ro datastore-capabilities* [datastore]
| +--ro datastore
| | -> /yanglib:yang-library/datastore/name
| +--ro per-node-capabilities* []
| +--ro (node-selection)?
| | +--:(node-selector)
| | +--ro node-selector?
| | nacm:node-instance-identifier
| +--ro notc:subscription-capabilities
| +--ro notc:max-nodes-per-update? uint32
| +--ro notc:periodic-notifications-supported?
| | notification-support
| +--ro (notc:update-period)?
| | +--:(notc:minimum-update-period)
| | | +--ro notc:minimum-update-period? uint32
| | +--:(notc:supported-update-period)
| | +--ro notc:supported-update-period* uint32
| +--ro notc:on-change-supported?
| | notification-support {yp:on-change}?
| +--ro notc:minimum-dampening-period? uint32
| | {yp:on-change}?
| +--ro notc:supported-excluded-change-type* union
| {yp:on-change}?
+--ro notc:subscription-capabilities
+--ro notc:max-nodes-per-update? uint32
+--ro notc:periodic-notifications-supported?
| notification-support
+--ro (notc:update-period)?
| +--:(notc:minimum-update-period)
| | +--ro notc:minimum-update-period? uint32
| +--:(notc:supported-update-period)
| +--ro notc:supported-update-period* uint32
+--ro notc:on-change-supported?
| notification-support {yp:on-change}?
+--ro notc:minimum-dampening-period? uint32
| {yp:on-change}?
+--ro notc:supported-excluded-change-type* union
| {yp:on-change}?
+--ro ypr:yang-push-module-revision-supported? boolean
{yang-push-revision-supported}?
]]></sourcecode></t>
</section>
</section>
<section anchor="YANG Module" title="YANG Module">
<t>The YANG module has two leaves augmenting the model of <xref
target="RFC8639">Subscription to YANG Notifications</xref>.</t>
<t><sourcecode type="yang" markers="true"
name="[email protected]"><![CDATA[
module ietf-yang-push-revision {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-yang-push-revision";
prefix ypr;
import ietf-subscribed-notifications {
prefix sn;
reference
"RFC 8639: Subscription to YANG Notifications";
}