What microformats are supported? What RDF vocabularies are supported?
The following microformats are supported: hCard, hCalendar, hReview, hFeed and XFN. You may use any RDF or OWL vocabulary. However, if you are publishing data using a custom-made vocabulary, make sure you make the schema definition easy to discover so that others can understand your data and build applications on it. The best approach is to follow the recommendations regarding “cool URIs” and serve both textual and machine processable vocabulary definitions at the locations where your URIs are pointing to. This is explained in more detail at http://www.w3.org/TR/cooluris/.