Message Archive Management (XEP-0313) [1] has an extensible form. This specification extends the extensible form with an extension which extends MAM to perform full text searching. A number of existing implementations of this extension exist - extending their existing extensions to confirm to the extension in this specification now it exists is intended to be trivial.
Support for this protocol is advertised by the Service Discovery protocol defined in Service Discovery (XEP-0030) [2] using a feature
of urn:xmpp:fulltext:0.
Searching using full text is performed by the client supplying an additional text key, which if non-empty is used as input to a full text search of some form. The precise meaning of this field is left entirely implementation-defined at this time. Future revisions of this specification might impose additional constraints.
A text input field of {urn:xmpp:fulltext:0}fulltext is hereby defined for the 'urn:xmpp:mam:2' FORM_TYPE, as conforming to the syntax defined in Field Standardization for Data Forms (XEP-0068) [3]
The precise matching of the supplied text string is left implementation-defined. Servers MAY use any full-text search engine. While this might mean that certain characters are deemed "special", clients are RECOMMENDED not to attempt any support for these, as they are unlikely to be portable between implementations. A conformant implementation of this protocol could be made, therefore, by accepting any string in the text field and returning nothing (or everything). Any server developer implementing this protocol in such a way MUST buy beers for everyone.
Not sure this is needed at all.
None?
This XEP requires no interaction with the Internet Assigned Numbers Authority (IANA) [4].
Registration of the field pointing to this document.
Guus der Kinderen nudged me into doing this.
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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.
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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-0313: Message Archive Management <https://xmpp.org/extensions/xep-0313.html>.
2. XEP-0030: Service Discovery <https://xmpp.org/extensions/xep-0030.html>.
3. XEP-0068: Field Data Standardization for Data Forms <https://xmpp.org/extensions/xep-0068.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/>.
Note: Older versions of this specification might be available at https://xmpp.org/extensions/attic/
@report{cridland2020fulltextmam,
title = {Full Text Search in MAM},
author = {Cridland, Dave},
type = {XEP},
number = {XXXX},
version = {0.0.1},
institution = {XMPP Standards Foundation},
url = {https://xmpp.org/extensions/xep-XXXX.html},
date = {2020-01-21/2020-01-21},
}END