Bad value “bookmark” for attribute “rel” on element “link”

[tomasbjerre]

I am validating a webpage containing:
<link rel="bookmark" title='Privatperson' href='/wps/portal/privatpers' hreflang="sv"/>

And I am getting:
Bad value “bookmark” for attribute “rel” on element “link”: The string “bookmark” is not a registered keyword.

But "bookmark" should be valid, according to:
http://www.w3.org/MarkUp/html3/dochead.html

https://validator.nu/?doc=http%3A%2F%2Fwww.forsakringskassan.se%2Farbetsgivare

[sideshowbarker]

Hi @tomasbjerre,

Thanks for taking time to report this here.

I am validating a webpage containing:
<link rel="bookmark" title='Privatperson' href='/wps/portal/privatpers' hreflang="sv"/>
And I am getting:
Bad value “bookmark” for attribute “rel” on element “link”: The string “bookmark” is not a registered keyword.

That’s not a bug or an oversight. It's expected behavior, actually.
The reason is, in HTML5, "bookmark" isn't an allowed rel value.
Please see http://microformats.org/wiki/existing-rel-values (search for "bookmark" on that page).

But "bookmark" should be valid, according to:
http://www.w3.org/MarkUp/html3/dochead.html

That document shouldn't be relied on for anything. It's not a specification. I'm not sure what it is, really, and I don't know how you came across it, but it seems to be from before 1997 (17 years old…) and so the information in it became outdated a long time ago.

In HTML currently (HTML5), the "bookmark" value of rel is intentionally not allowed.

So I'm going to go ahead and close this issue, but feel free to still post any follow-up comments here if you have any other questions to ask. 👋