<link rel="universal" />?

[weegillis]

Does anybody know how well supported <link rel="" /> is for attributes other than "icon" and "stylesheet"?

HTML / XHTML : HTML link rel Attribute

HTML 5 : HTML 5 link Tag

[morestar]

So apparently only the rel attribute is recognized in all browsers when it has to do with a stylesheet. I didn't know that...I rarely use rel though unless it has to do with a code snippet I snagged somewhere that already has the attribute in it.

As the link points out, the rel attribute should only be used with the link tag.

[wige]

The rel attribute is intended to show the relationship between one document and another. For <link>, which indicates only that a relationship exists, rel is used to indicate the nature of the relationship. Currently, this is one of the only cases where the use of the rel attribute is meaningful to a browser.

For the link tag, I believe there is also very limited support for "alternate", used to indicate the link points to a mirrored document or a translated version, or a version intended for display on an alternate type of device.

Most of the common rel values are intended for use with spiders, to indicate how documents linked with <a> are related to one another. It is possible however, that browsers will increase support for additional rel values, such as "help" and "copyright" to give users a simple and common mechanism for obtaining additional information about web applications.