This document defines a protocol for communicating information about the music to which a user is listening. Such information may be seen as a kind of "extended presence", and users may want to communicate such information to their contacts on the network as a fun add-on to traditional IM applications or to provide integration with common music-player applications.
Information about tunes is provided by the user and propagated on the network by the user's client. The information container for tune data is a <tune/> element that is qualified by the 'http://jabber.org/protocol/tune' namespace. The tune information itself is provided as the XML character data of the following children of the <tune/> element:
| Element | Description | Example | Datatype |
|---|---|---|---|
| artist | The artist of the song or piece | Yes | xs:string |
| composer | The composer of the song or piece | Дмитрий Дмитриевич Шостакович (Dmitri Shostakovich) | xs:string |
| date | The recording or publication date of the song or piece | 2003-02-15 | xs:string |
| genre | The genre of the song or piece | Opera | xs:string |
| language | The language of the song or piece, SHOULD be an ISO-639 three letter code | rus | xs:string |
| length | The duration of the song or piece in seconds | 686 | xs:unsignedShort |
| lyricist | The lyricist of the song or piece | William Shakespeare | xs:string |
| rating | The user's rating of the song or piece, from 1 (lowest) to 10 (highest). | 8 | xs:positiveInteger |
| performer | The performer of the song or piece | Елена Жидкова (Elena Zhidkova) | xs:string |
| source | The collection (e.g., album) or other source (e.g., a band website that hosts streams or audio files) | Yessongs | xs:string |
| title | The title of the song or piece | Heart of the Sunrise | xs:string |
| track | A unique identifier for the tune; e.g., the track number within a collection or the specific URI for the object (e.g., a stream or audio file) | 3 | xs:string |
| uri | A URI or URL pointing to information about the song, collection, or artist | http://www.yesworld.com/lyrics/Fragile.html#9 | xs:anyURI |
NOTE: The datatypes specified above are defined in XML Schema Part 2 [1].
Tune information SHOULD be communicated and transported by means of the Publish-Subscribe (XEP-0060) [2] subset specified in Personal Eventing Protocol (XEP-0163) [3]. Because tune information is not pure presence information and can change independently of the user's availability, it SHOULD NOT be provided as an extension to <presence/>.
<iq type='set'
from='stpeter@jabber.org/14793c64-0f94-11dc-9430-000bcd821bfb'
id='tunes123'>
<pubsub xmlns='http://jabber.org/protocol/pubsub'>
<publish node='http://jabber.org/protocol/tune'>
<item>
<tune xmlns='http://jabber.org/protocol/tune'>
<artist>Yes</artist>
<length>686</length>
<rating>8</rating>
<source>Yessongs</source>
<title>Heart of the Sunrise</title>
<track>3</track>
<uri>http://www.yesworld.com/lyrics/Fragile.html#9</uri>
</tune>
</item>
</publish>
</pubsub>
</iq>
The tune information is then delivered to all subscribers:
<message
from='stpeter@jabber.org'
to='maineboy@jabber.org'>
<event xmlns='http://jabber.org/protocol/pubsub#event'>
<items node='http://jabber.org/protocol/tune'>
<item id='bffe6584-0f9c-11dc-84ba-001143d5d5db'>
<tune xmlns='http://jabber.org/protocol/tune'>
<artist>Yes</artist>
<length>686</length>
<rating>8</rating>
<source>Yessongs</source>
<title>Heart of the Sunrise</title>
<track>3</track>
<uri>http://www.yesworld.com/lyrics/Fragile.html#9</uri>
</tune>
</item>
</items>
</event>
</message>
In order to indicate that the user is no longer listening to any tunes (or has simply disabled publication), the user's client shall send an empty <tune/> element, which can be considered a "stop command" for user tunes:
<iq type='set'
from='stpeter@jabber.org/14793c64-0f94-11dc-9430-000bcd821bfb'
id='tunes345'>
<pubsub xmlns='http://jabber.org/protocol/pubsub'>
<publish node='http://jabber.org/protocol/tune'>
<item>
<tune xmlns='http://jabber.org/protocol/tune'/>
</item>
</publish>
</pubsub>
</iq>
<message
from='stpeter@jabber.org'
to='maineboy@jabber.org'>
<event xmlns='http://jabber.org/protocol/pubsub#event'>
<items node='http://jabber.org/protocol/tune'>
<item id='cbbb3f5a-0f9c-11dc-afe0-001143d5d5db'>
<tune xmlns='http://jabber.org/protocol/tune'/>
</item>
</items>
</event>
</message>
To prevent a large number of updates when a user is skipping through tracks, an implementation SHOULD wait several seconds before publishing new tune information.
If the length is unknown (e.g., the user is listening to a stream), the <length/> element SHOULD NOT be included.
A typical interface for user ratings is to show one to five star icons such as ★★★★. If this interface is used, the numbers 2, 4, 6, 8, and 10 should be mapped to one, two, three, four, and five stars respectively, and odd numbers should be mapped to half stars (e.g., the number 9 would be mapped to four-and-a-half stars).
The publication of user tune information is not known to introduce any new security considerations above and beyond those defined in XEP-0060: Publish-Subscribe.
This document requires no interaction with the Internet Assigned Numbers Authority (IANA) [4].
The XMPP Registrar [5] includes 'http://jabber.org/protocol/tune' in its registry of protocol namespaces.
<?xml version='1.0' encoding='UTF-8'?>
<xs:schema
xmlns:xs='http://www.w3.org/2001/XMLSchema'
targetNamespace='http://jabber.org/protocol/tune'
xmlns='http://jabber.org/protocol/tune'
elementFormDefault='qualified'>
<xs:annotation>
<xs:documentation>
The protocol documented by this schema is defined in
XEP-0118: http://www.xmpp.org/extensions/xep-0118.html
</xs:documentation>
</xs:annotation>
<xs:element name='tune'>
<xs:complexType>
<xs:sequence minOccurs='0'>
<xs:element name='artist' type='xs:string' minOccurs='0'/>
<xs:element name='composer' type='xs:string' minOccurs='0'/>
<xs:element name='date' type='xs:string' minOccurs='0'/>
<xs:element name='genre' type='xs:string' minOccurs='0'/>
<xs:element name='language' type='xs:string' minOccurs='0'/>
<xs:element name='length' type='xs:unsignedShort' minOccurs='0'/>
<xs:element name='lyricist' type='xs:string' minOccurs='0'/>
<xs:element name='performer' type='xs:string' minOccurs='0'/>
<xs:element name='rating' minOccurs='0'>
<xs:simpleType>
<xs:restriction base='xs:positiveInteger'>
<xs:maxInclusive value='10'/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name='source' type='xs:string' minOccurs='0'/>
<xs:element name='title' type='xs:string' minOccurs='0'/>
<xs:element name='track' type='xs:string' minOccurs='0'/>
<xs:element name='uri' type='xs:anyURI' minOccurs='0'/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
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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 <http://xmpp.org/about/discuss.shtml> 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. XML Schema Part 2: Datatypes <http://www.w3.org/TR/xmlschema11-2/>.
2. XEP-0060: Publish-Subscribe <https://xmpp.org/extensions/xep-0060.html>.
3. XEP-0163: Personal Eventing Protocol <https://xmpp.org/extensions/xep-0163.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/>.
Note: Older versions of this specification might be available at http://xmpp.org/extensions/attic/
Add further tags for non-pop music
Added rating element.
Removed non-PEP examples; added uri element.
Per a vote of the Jabber Council, advanced status to Draft.
Added example with URL.
Changed recommendation to not include the <length/> element if the track time is unknown.
Added implementation notes; clarified nature of <source/> and <track/> elements; if length is unknown, set to zero.
Changed <length/> datatype from xs:duration to xs:unsignedShort.
Corrected several errors; added reference to XEP-0033.
Reverted from infobits to tune elements.
Slight modifications to track changes to infobits specifications.
Replaced tune elements with infobits.
Added "stop" function via empty <tune/> element.
Initial version.
END