Who is the registrar for microformats?
There is no central registry. Microformats are registered in a distributed manner using profiles. For more information on profiles see http://microformats.org/wiki/profile-uris and http://gmpg.org/xmdp/ Conflicts and interoperability are managed through social processes rather than a formal registry. Current microformat profiles can be found at http://gmpg.org, http://w3.org, and http://microformats.org.