This is the official registry of SHIM headers as authorized by XEP-0131: Stanza Headers and Internet Metadata (SHIM) and as maintained by the XMPP Registrar.
Last Updated: 2018-08-03
XML: https://xmpp.org/registrar/shim.xml
| Name | Description | Documentation |
|---|---|---|
| Accept | see RFC 2616 | RFC 2616 |
| Accept-Charset | see RFC 2616 | RFC 2616 |
| Accept-Encoding | see RFC 2616 | RFC 2616 |
| Accept-Language | see RFC 2616 | RFC 2616 |
| Accept-Ranges | see RFC 2616 | RFC 2616 |
| Age | see RFC 2616 | RFC 2616 |
| Alert-Info | see RFC 3261 | RFC 3261 |
| Allow | see RFC 2616 | RFC 2616 |
| Authentication-Info | see RFC 2617 | RFC 2617 |
| Cache-Control | see RFC 2616 | RFC 2616 |
| Call-ID | see RFC 3261 | RFC 3261 |
| Call-Info | see RFC 3261 | RFC 3261 |
| Classification | a level within a classification scheme | XEP-0131 |
| Collection | The collection via which a notification was received from the originating node | XEP-0248 |
| Comments | see RFC 2822 | RFC 2822 |
| Connection | see RFC 2616 | RFC 2616 |
| Contact | see RFC 3261 | RFC 3261 |
| Content-Description | see RFC 2045 | RFC 2045 |
| Content-Disposition | see RFC 3261 | RFC 3261 |
| Content-Encoding | see RFC 2616 | RFC 2616 |
| Content-ID | see RFC 2045 | RFC 2045 |
| Content-Language | see RFC 2616 | RFC 2616 |
| Content-Length | see RFC 2616 | RFC 2616 |
| Content-Location | see RFC 2616 | RFC 2616 |
| Content-MD5 | see RFC 2616 | RFC 2616 |
| Content-Range | see RFC 2616 | RFC 2616 |
| Content-Transfer-Encoding | see RFC 2045 | RFC 2045 |
| Content-Type | see RFC 2045 or RFC 2616 | RFC 2045 or RFC 2616 |
| Contributor | an entity other than the primary Creator who helped to create a resource | RFC 2413 |
| Coverage | the spatial or temporal characteristics of a resource | RFC 2413 |
| Created | date and time of stanza creation in ISO 8601 format | XEP-0131 |
| Creator | the person or organization responsible for creating the content of a resource | RFC 2413 |
| CSeq | see RFC 3261 | RFC 3261 |
| Date | a string that conforms to the Date profile specified in XEP-0082 | XEP-0131 |
| DateTime | a string that conforms to the DateTime profile specified in XEP-0082 | XEP-0131 |
| Description | a textual description of the content of a resource | RFC 2413 |
| Distribute | whether or not the stanza may be further distributed | XEP-0131 |
| Error-Info | see RFC 3261 | RFC 3261 |
| ETag | see RFC 2616 | RFC 2616 |
| Expect | see RFC 2616 | RFC 2616 |
| Expires | see RFC 2616 | RFC 2616 |
| Format | the data format of a resource | RFC 2413 |
| Host | see RFC 2616 | RFC 2616 |
| Identifier | a string or number used to identity a resource | RFC 2413 |
| If-Match | see RFC 2616 | RFC 2616 |
| If-Modified-Since | see RFC 2616 | RFC 2616 |
| If-None-Match | see RFC 2616 | RFC 2616 |
| If-Range | see RFC 2616 | RFC 2616 |
| If-Unmodified-Since | see RFC 2616 | RFC 2616 |
| In-Reply-To | see RFC 2822 | RFC 2822 |
| Keywords | see RFC 2822 | RFC 2822 |
| Language | the language in expressing the content of a resource | RFC 2413 |
| Last-Modified | see RFC 2616 | RFC 2616 |
| Location | see RFC 2616 | RFC 2616 |
| Max-Forwards | see RFC 2616 | RFC 2616 |
| Message-ID | see RFC 2822 | RFC 2822 |
| MIME-Version | see RFC 2045 | RFC 2045 |
| Organization | see RFC 3261 | RFC 3261 |
| Pragma | see RFC 2616 | RFC 2616 |
| Priority | see RFC 3261 | RFC 3261 |
| Proxy-Authenticate | see RFC 2616 | RFC 2616 |
| Proxy-Authorization | see RFC 2616 | RFC 2616 |
| Publisher | the entity responsible for making a resource available | RFC 2413 |
| Range | see RFC 2616 | RFC 2616 |
| Received | see RFC 2822 | RFC 2822 |
| Record-Route | see RFC 3261 | RFC 3261 |
| References | see RFC 2822 | RFC 2822 |
| Referer | see RFC 2616 | RFC 2616 |
| Relation | the identifier of a second resource related to a primary resource | RFC 2413 |
| Reply-To | see RFC 3261 | RFC 3261 |
| Require | see RFC 3261 | RFC 3261 |
| Resent-Bcc | see RFC 2822 | RFC 2822 |
| Resent-Cc | see RFC 2822 | RFC 2822 |
| Resent-Date | see RFC 2822 | RFC 2822 |
| Resent-From | see RFC 2822 | RFC 2822 |
| Resent-Message-Id | see RFC 2822 | RFC 2822 |
| Resent-Sender | see RFC 2822 | RFC 2822 |
| Resent-To | see RFC 2822 | RFC 2822 |
| Retry-After | see RFC 2616 | RFC 2616 |
| Return-Path | see RFC 2822 | RFC 2822 |
| RFC2822Date | the datetime associated with an email message, SIP exchange, or HTTP request | RFC 2822 |
| Rights | a rights management statement, identifier, or link | RFC 2413 |
| Route | see RFC 3261 | RFC 3261 |
| Sender | see RFC 2822 | RFC 2822 |
| Server | see RFC 2616 | RFC 2616 |
| Source | information about the original source of the present resource | RFC 2413 |
| Start | The dateTime at which a state, event, or activity starts | XEP-0149 |
| Stop | The dateTime at which a state, event, or activity stops | XEP-0149 |
| Store | whether or not the stanza may be stored or archived | XEP-0131 |
| SubID | A subscription identifer within the pubsub protocol | XEP-0060 |
| Subject | the human-readable topic of a message or resource | RFC 2822 or RFC 2413 |
| Supported | see RFC 3261 | RFC 3261 |
| TE | see RFC 2616 | RFC 2616 |
| Time | a string that conforms to the Time profile specified in XEP-0082 | XEP-0131 |
| Timestamp | see RFC 3261 | RFC 3261 |
| Title | the name given to a resource | RFC 2413 |
| Trailer | see RFC 2616 | RFC 2616 |
| Transfer-Encoding | see RFC 2616 | RFC 2616 |
| TTL | a time to live for the stanza, in seconds | XEP-0131 |
| Type | the category of a resource | RFC 2413 |
| Unsupported | see RFC 3261 | RFC 3261 |
| Upgrade | see RFC 2616 | RFC 2616 |
| Urgency | The degree to which a message requires immediate action or attention; consistent with existing messaging triage systems, the defined values are "high", "medium", and "low" | N/A |
| User-Agent | see RFC 2616 | RFC 2616 |
| Vary | see RFC 2616 | RFC 2616 |
| Via | see RFC 2616 | RFC 2616 |
| Warning | see RFC 2616 | RFC 2616 |
| WWW-Authenticate | see RFC 2616 | RFC 2616 |
2018-08-03 Correct pubsub headers from XEP-0060 and XEP-0248. (mv)
2006-07-05 Added pubsub headers from XEP-0060. (psa)
2006-01-24 Added Start and Stop headers from XEP-0149. (psa)
2005-12-14 Added Urgency header. (psa)
2005-08-19 Added base Dublin Core metadata from RFC 2413. (psa)
2004-10-22 Initial version. (psa)