Bad value $ for attribute rel on element link: The string $ is not a registered keyword

Rule from html under compatibility category

What is a trooper!

we have submitted your edit to the community for review! We'll review and make it live on the site in the next few hours, the internet thanks you :).

Browse another section of the knowledge base

Suggest an edit


This rule has no content... yet.

Add content to this rule

Or just browse to view rules that have content


You used a keyword in rel that is not recognised. If the rel attribute is absent, has no keywords, or if none of the keywords used are allowed according to the definitions in this specification, then the element does not create any links.

How do I fix this ?

Make sure that you haven't misspelled the keyword or use a recognised keyword instead. Currently you can use the following:

  • alternate
  • author
  • help
  • icon
  • license
  • next
  • nofollow
  • noreferrer
  • prefetch
  • prev
  • search
  • stylesheet
  • tag


Browse another section of the knowledge base

Signup icon
Ready to see how well your site scores?

Passmarked works best when you have an account. It allows you to keep a dashboard with saved data of the sites you have run through the system, we’ll alert you about important updates and you get access to the Passmarked Slack forum.

Sign up to get started