Today the W3C within its newsletter announced a recommendation to tag online media with a set of metadata. The recommendation is called Ontology for Media Resources 1.0 and is something like a milestone to the online media world.
The set of metadata enables to tag online media like video to be indexed by other services and to implement the information into applications like media guides. By this now online media may be indexed and shown within applications like electronic program guides (epg) to be available and accessible by timetable (s.a. the reviews of the online media guides Clicker and Live Matrix.).