xmlns.com is an internet domain created for the purposes of simple Web namespace management. The rationale for registering xmlns.com was to secure a short, memorable domain suitable for naming concepts for use in RDF and XML vocabularies.
markup means something when we can identify it and do useful things with it. In this way, semantic markup becomes more than merely descriptive. It becomes a brilliant mechanism that allows both humans and machines to “understand” the same information.
microformats are, just as importantly, defined by what they are not: not a new language; not infinitely extensible and open-ended; not an attempt to get everyone to change their behavior and rewrite their tools; not a whole new approach that throw