existing-rel-values

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existing rel values

Contents


This page contains tables of known rel values from specifications, formats, proposals, brainstorms, and non-trivial POSH usage in the wild. In addition, dropped and rejected values are listed at the end for comprehensiveness.

Note: these lists may be incompleete, please help complete them from the referenced sources.

usage

See rel-faq#How_is_rel_used. Regarding rev, see: rel-faq#Should_rev_even_be_used.

formats

These rel values are defined formats from specifications (HTML 4, microformats) are thus are recommended for general use. Alphabetically ordered by value.

Sources:

rel value summary
(from the relevant specification where possible))
defining specification
acquaintance the person represented by the current document considers the person represented by the referenced document to be an acquaintance XFN
alternate Designates substitute versions for the document in which the link occurs. When used together with the lang attribute, it implies a translated version of the document. When used together with the media attribute, it implies a version designed for a different medium (or media). HTML4 link type
appendix Refers to a document serving as an appendix in a collection of documents. HTML4 link type
bookmark Refers to a bookmark. A bookmark is a link to a key entry point within an extended document. The title attribute may be used, for example, to label the bookmark. Note that several bookmarks may be defined in each document. HTML4 link type
chapter Refers to a document serving as a chapter in a collection of documents. HTML4 link type
child the referenced person is a child of the person represented by the current document XFN
colleague the referenced person is a colleague of the person represented by the current document XFN
contact the person represented by the current document considers the person represented by the referenced document to be a contact XFN
contents Refers to a document serving as a table of contents. Some user agents also support the synonym ToC (from "Table of Contents"). HTML4 link type
copyright Refers to a copyright statement for the current document. HTML4 link type
co-resident the referenced person lives in the same residence as the person represented by the current document XFN
co-worker the referenced person is a co-worker of the person represented by the current document XFN
crush this person considers the referenced person to be a crush (i.e. has a crush on the referenced person) XFN
date this person considers the referenced person to be a date (i.e. is dating the referenced person) XFN
friend the person represented by the current document considers the person represented by the referenced document to be a friend XFN
glossary Refers to a document providing a glossary of terms that pertain to the current document.HTML4 link type
help Refers to a document offering help (more information, links to other sources information, etc.) HTML4 link type
home …indicates that the [referenced document] is the homepage of the site in which the current page appears. rel-home
index Refers to a document providing an index for the current document. HTML4 link type
kin the referenced person is part of the extended family of the person represented by the current document XFN
license …indicates that the [referenced document] is a license for the current page. rel-license
me the referenced document represents the same person as does the current document XFN
met this person has met the referenced person XFN
muse the referenced person inspires the person represented by the current document XFN
neighbor the referenced person lives nearby the person represented by the current document XFN
next Refers to the next document in a linear sequence of documents. User agents may choose to preload the "next" document, to reduce the perceived load time. HTML4 link type
nofollow …indicates that the destination of that hyperlink SHOULD NOT be afforded any additional weight or ranking by user agents which perform link analysis upon web pages (e.g. search engines). rel-nofollow
parent the referenced person is a parent of the person represented by the current document XFN
prev Refers to the previous document in an ordered series of documents. Some user agents also support the synonym "Previous". HTML4 link type
previous Synonym of prev HTML4 link type
section Refers to a document serving as a section in a collection of documents. HTML4 link type
sibling the referenced person is a sibling of the person represented by the current document XFN
spouse the referenced person is a spouse of the person represented by the current document XFN
sweetheart this person considers the referenced person to be their sweetheart XFN
start Refers to the first document in a collection of documents. This link type tells search engines which document is considered by the author to be the starting point of the collection. HTML4 link type
stylesheet a style sheet for the current document HTML4 link type
subsection Refers to a document serving as a subsection in a collection of documents. HTML4 link type
tag …indicates that the [referenced document] is an author-designated "tag" (or keyword/subject) for the current page. rel-tag
toc Synonym of contents (from "Table Of Contents") HTML4 link type

notes


proposals

A few rel values have been developed as drafts as a result of going through most of the microformats process, and are thus listed here for your serious consideration. You may use these values, and if you find any problems with them please point them out on the respective "issues" page for the rel value.

rel value summary proposed in
directory …indicates that the destination of the hyperlink is a directory listing containing an entry for the current page. rel-directory
enclosure …indicates that the destination of that hyperlink is intended to be downloaded and cached. rel-enclosure
payment rel-payment


brainstorming

Several rel values are being brainstormed as potential microformats and are thus listed here. If you find you have a use for such semantics in real world examples, consider trying out these values and provide feedback on the respective brainstorming page(s) with your results and experiences.

rel value summary brainstormed in
cite indicate[s] that the destination of that hyperlink is an authoritative source or a precedent to the current page. distributed-conversation-brainstorming
group the referenced document represents a group to which the person represented by the current document belongs group-brainstorming
member the referenced document represents a member of the group represented by the current document group-brainstorming
product product-brainstorming
profilexmdp-brainstorming


POSH usage

There are numerous rel values used as POSH, both in the wild, whose origins are not necessarily known, nor are their meanings consistent. There are also numerous rel values from external proposals of varying degrees of merit. It is useful to document their existence and summarize their implied meanings/usage intent as research that may be used to perhaps take one or more of them thru the microformats process if there is both sufficient interest and sufficient in the wild usage.

Note: this list is incomplete, please help complete it from the following sources:

External sources:

rel value summary origin proposal(s)
archive index of archived entries unknown, perhaps Wordpress open source blogging software WCLR
authorunknown DevMo
comment WCLR
contribution WCLR
endorsed WCLR
feed WCLR
made LRdraft
microsummaryMicrosummary, be aware of: microsummary issues
permalink WCLR
pingback WCLR
referral WCLR
related WCLR
resource WCLR
search unknown unknown
sponsor WCLR
trackback unknown, perhaps open source Movable Type blogging software WCLR
unendorsed WCLR
user WCLR
via WCLR


dropped

The following rel values were in earlier version(s) of specification(s) and it is presumed by their absence from the most recent version of the respective specification(s) that they have been deprecated or obsoleted. Use of them could be considered a bit more standard than just POSH, although you may wish to research why such values were omitted from latter specifications before using them. If you do discover the reasoning, please add a short statement or link to thereof into the appropriate place in the following table.

Sources: HTML3 (expired!) - (has been superceded by HTML 3.2 - which itself has been superceded by HTML 4.0 - which itself has been updated by HTML 4.01, commonly referred to as "HTML 4" in this wiki and other places.)

rel value summary defining specification why dropped
bannerWas used to reference another document to be used as banner for this document (i.e. a form of "include" statement).HTML 3unknown
upWhen the document forms part of a hierarchy, this link references the immediate parent of the current document.HTML 3unknown


rejected

Some rel values have been proposed and rejected. These are not recommended for use, and listed here to make that explicit.

Source: rejected-formats.

rel value origin / proposal why rejected
pavatar pavatar rejected-formats#Pavatar


unspecified

Some rel values have been added to this page perhaps in one of the tables above, but no examples, nor an actual specification explicitly stating that the value(s) should be used in the HTML4 'rel' attribute could be found. They are listed here in the hopes someone can discover more specific/precise URLs to examples or specifications about them (preferably both).

rel value summary possible source
schema.DC Dublin Core
schema.DCTERMS Dublin Core

tools

See implementations.


related

existing-rel-values was last modified: Wednesday, December 31st, 1969

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