…sions to the predefined set of link types may be registered in the Microformats wiki existing-rel-values page [MFREL] Anyone is free to edit the Microformats wiki existing-rel-values page at any time to add a type. Extension types must be specified with the following information:…

… Extensions to the predefined set of link types may be registered in the WHATWG Wiki RelExtensions page [WHATWGWIKI] Anyone is free to edit the WHATWG Wiki RelExtensions page at any time to add a type. Extension types must be specified with the following information: Keyword The …