rel

While doing the HTML for my new template, I stumbled across a new meta tag <link rel="profile" href="http://gmpg.org/xfn/11" /> What's this for? I found it linking to this page , and through Google I found this Microformat but I didn't get it. unor In HTML 4.01, there is the profile attribute for the head element: This attribute specifies the location of one or more meta data profiles, separated by white space. For future extensions, user agents should consider the value to be a list even though this specification only considers the first URI to be significant. It is used to link to meta data

The WHATWG document for HTML5 says that the rel attribute must contain values that are space-separated, and then it gives a table of allowed values. The attribue's value must be a set of space-separated tokens. The allowed keywords and their meanings ... The list of allowed keywords for the link element does not include shortcut , but it does include icon . So I'm looking at the all-too-well-known tag <link rel="shortcut icon" href="/favicon.ico" /> and wondering if it is HTML5-compliant. Should I remove the keyword shortcut from this tag throughout my Website? From the same WHATWG document: