I've collected some examples of tagging behaviour, found in the wild, which does not use rel-tag (or at least does not do so as currently specified): <http://microformats.org/wiki/rel-tag-other-evidence> I've also proposed that some /additiona/ methods of tagging be made available: <http://microformats.org/wiki/rel-tag-other-evidence#Brainstorming> * Using the element contents: <a class="tag" href="http://example.com/?cat=111"> Anthony Davis </a> Advantage: visible data used. * Using the element title: <a class="tag ufusetitle" title="cheese" href="http://example.com/?cat=cheese"> All sorts of cheese </a> Advantage: compatible with other proposed uses of title attributes (replacing the abbr-design-pattern): <http://microformats.org/wiki/title-trigger> This would require parsers to be updated, and to have an agreed hierarchy (say, rel-tag trumps element value, trumps title) in case more than one method is present; but would be backwards-compatible. (Class names are for illustrative purposes only.) -- Andy Mabbett