rel

 rel  is an HTML attribute that has a space separated set of values defined by the rel registry used in the IndieWeb for various discovery purposes such as identity (rel-me), authorship (rel-author), Webmention endpoint, Micropub endpoint, IndieAuth endpoints, etc.

Articles

 * : "The rel attribute has the potential to take the Internet to the next level… and yet, we usually forget about it."
 * , reacting to Álvaro’s post: "Therefore, yes, enriching documents with more metadata, using, has benefits, some of which we do claim and some of which we can claim. But maintaining this kind of invisible information for anything that can change, over the years, is so difficult, it won’t just be a problem for more use of —it already has been a problem for use of."