[Playlist] good use of meta[@rel] in the wild

[Lucas Gonze]

http://geekkid.net/jukebox/xspfdoc.html

meta rel="http://geekkid.net/type"
     * TYPE PROVIDES A TELLS THE PLAYER HOW TO HANDLE THE MEDIA, 
HOWEVER, THE PLAYER CAN USUALLY CHOOSE FOR ITSELF AUTOMATICALLY. ONLY 
FILL IN IF THE URL IS UNUSUAL. TYPE TAGS ARE ALL LOWERCASE.
     * TYPES ARE:

    1. audio
    2. video
    3. playlist
    4. link