RelExtensions

This page lists the allowed extension values for the rel="" attribute in HTML5. You may add your own values to this list, which makes them legal HTML5 rel values. We ask that you try to avoid redundancy; if someone has already defined a value that does roughly what you want, please reuse it.

Keyword	Effect on...		Brief description	Link to more details	Synonyms	Status
	link	a and area
script	not allowed	not allowed	Was proposed to replace <script>. Use <script> instead.	none		Rejected
glossary	Hyperlink	Hyperlink	Target document provides definitions for words in current document.	HTML4		Proposal
chapter	Hyperlink	Hyperlink	Target document is a subdocument of the current document.	HTML4	section, subsection, appendix	Proposal
edit	Hyperlink	Hyperlink	Target document is an editable version of the current document.	Atom Protocol		Proposal
openid.server	external resource	not allowed	OpenID authentication delegation	OpenID specificaion		Proposal
openid.delegate	external resource	not allowed	OpenID authentication delegation	OpenID specificaion		Proposal
widget	Hyperlink	Hyperlink	Points to a widget.	Widgets 1.0 Editor's draft		Proposal
service	Hyperlink	Not Allowed	Points to a resource describing a service API	ServiceRelExtension		Proposal

The "Effect on... link" column must either say "not allowed" if the rel value is not allowed on <link> elements, "hyperlink" if the rel value creates a hyperlink, or "external resource" if the rel value creates a link to an external resource.

The "Effect on... a and area" column must either say "not allowed" or "hyperlink".

For the "Status" section to be changed to "Accepted", the proposed keyword must have been through the Microformats process, and been approved by the Microformats community.

For more details, see the HTML5 specification.