"Notifications" are (usually) pop-up windows that appear in a visible area of the screen even when the emitting application is in the background, often triggering a sound alert. Instant messaging clients expectedly use notifications to inform users when they receive a message.
Users may want to customise which conversations should trigger notifications and under which conditions. In practice, this is already implemented in many instant messaging clients, including XMPP clients. This specification proposes a mechanism to synchronise per-discussion notification settings across different XMPP clients.
Notification settings are represented by the <notify> element. This element MUST be a child of an element identifying a specific chat by its JID, such as a PEP Native Bookmarks (XEP-0402) [1] <extensions>.
This protocol specifies three children for the <notify> element, each corresponding to a notification setting: <always> <on-mention> and <never>.
<notify xmlns='urn:xmpp:notification-settings:0'> <never /> </notify>
One might want to choose different notification settings depending on the client type. In this case, a "client-type" attribute can be added to the notification setting, using registered Service Discovery Identities.
<notify xmlns='urn:xmpp:notification-settings:0'> <never client-type="pc" /> <on-mention client-type="mobile" /> </notify>
Finally, clients can use this specification to synchronise finer-grained notification settings using custom namespaces.
<notify xmlns='urn:xmpp:notification-settings:0'>
<never client-type="pc" />
<on-mention client-type="mobile" />
<advanced>
<custom-extension xmlns="custom:ns-1">
<when day-of-week="monday">night-time-only</day-of-week>
...
</custom-extension">
<custom-extension-2 xmlns="custom:ns-2">
<weather>raining</weather>
...
</custom-extension-2">
</advanced>
</notify>
Entities implementing this specification MUST NOT delete or alter the advanced notification settings they do not support when updating the notification settings for a given chat.
If there is more than one notification setting for a given chat, entities implementing this specification MUST specify which client type they apply to. The (notification setting, client-type) pairs MUST be unique.
Entities using advanced notification settings SHOULD attempt to provide the basic notification setting which is the closest to what they offer as a fallback for other entities.
The "on-mention" notification MAY rely on the user's nickname being spelled out in an incoming message in a group chat, but SHOULD rely on mechanisms to explicitly "ping" the user, such as a Message Replies (XEP-0461) [2] element referring a user's previous message or a specific mention, such as a References (XEP-0372) [3] mention.
In the absence of a notification settings for a given chat, "always" SHOULD be assumed for direct chats and private group chats, and "on-mention" for public group chats.
See considerations in PEP Native Bookmarks (XEP-0402) [1].
This document requires no interaction with the Internet Assigned Numbers Authority (IANA) [4].
This specification defines the following XML namespace:
The XMPP Registrar [5] includes this namespace in the registry located at <https://xmpp.org/registrar/namespaces.html>, as described in Section 4 of XMPP Registrar Function (XEP-0053) [6].
If the protocol defined in this specification undergoes a revision that is not fully backwards-compatible with an older version, the XMPP Registrar shall increment the protocol version number found at the end of the XML namespaces defined herein, as described in Section 4 of XEP-0053.
<?xml version='1.0' encoding='UTF-8'?>
<xs:schema
xmlns:xs='http://www.w3.org/2001/XMLSchema'
targetNamespace='urn:xmpp:notification-settings:0'
xmlns='urn:xmpp:notification-settings:0'
elementFormDefault='qualified'>
<xs:annotation>
<xs:documentation>
The protocol documented by this schema is defined in
XEP-0492: http://www.xmpp.org/extensions/xep-0492.html
</xs:documentation>
</xs:annotation>
<xs:element name='notify'>
<xs:complexType>
<xs:attribute name='when' default='always'>
<xs:restriction base='xs:NCName'>
<xs:enumeration value='always'/>
<xs:enumeration value='never'/>
<xs:enumeration value='on-mention'/>
</xs:restriction>
</xs:attribute>
</xs:complexType>
</xs:element>
</xs:schema>
This document in other formats: XML PDF
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The Extensible Messaging and Presence Protocol (XMPP) is defined in the XMPP Core (RFC 6120) and XMPP IM (RFC 6121) specifications contributed by the XMPP Standards Foundation to the Internet Standards Process, which is managed by the Internet Engineering Task Force in accordance with RFC 2026. Any protocol defined in this document has been developed outside the Internet Standards Process and is to be understood as an extension to XMPP rather than as an evolution, development, or modification of XMPP itself.
The primary venue for discussion of XMPP Extension Protocols is the <standards@xmpp.org> discussion list.
Discussion on other xmpp.org discussion lists might also be appropriate; see <https://xmpp.org/community/> for a complete list.
Errata can be sent to <editor@xmpp.org>.
The following requirements keywords as used in this document are to be interpreted as described in RFC 2119: "MUST", "SHALL", "REQUIRED"; "MUST NOT", "SHALL NOT"; "SHOULD", "RECOMMENDED"; "SHOULD NOT", "NOT RECOMMENDED"; "MAY", "OPTIONAL".
1. XEP-0402: PEP Native Bookmarks <https://xmpp.org/extensions/xep-0402.html>.
2. XEP-0461: Message Replies <https://xmpp.org/extensions/xep-0461.html>.
3. XEP-0372: References <https://xmpp.org/extensions/xep-0372.html>.
4. The Internet Assigned Numbers Authority (IANA) is the central coordinator for the assignment of unique parameter values for Internet protocols, such as port numbers and URI schemes. For further information, see <http://www.iana.org/>.
5. The XMPP Registrar maintains a list of reserved protocol namespaces as well as registries of parameters used in the context of XMPP extension protocols approved by the XMPP Standards Foundation. For further information, see <https://xmpp.org/registrar/>.
6. XEP-0053: XMPP Registrar Function <https://xmpp.org/extensions/xep-0053.html>.
Note: Older versions of this specification might be available at https://xmpp.org/extensions/attic/
Update after discussions on the standards@ mailing list.
Initial version.
@report{cedilnik2024notification-settings,
title = {Chat notification settings},
author = {Cedilnik, Nicolas},
type = {XEP},
number = {0492},
version = {0.1.0},
institution = {XMPP Standards Foundation},
url = {https://xmpp.org/extensions/xep-0492.html},
date = {2024-06-06/2024-07-01},
}END