Where can I find the xml schema for youtube xml below ?
<?xml version= 1.0 encoding= UTF-8 ?>
<feed xmlns= http://www.w3.org/2005/Atom
xmlns:openSearch= http://a9.com/-/spec/opensearchrss/1.0/
xmlns:gml= http://www.opengis.net/gml xmlns:georss= http://www.georss.org/georss
xmlns:media= http://search.yahoo.com/mrss/
xmlns:yt= http://gdata.youtube.com/schemas/2007
xmlns:gd= http://schemas.google.com/g/2005 >
<id>http://gdata.youtube.com/feeds/api/standardfeeds/most_viewed</id>
<updated>2008-03-06T14:43:27.000-08:00</updated>
<category scheme= http://schemas.google.com/g/2005#kind
term= http://gdata.youtube.com/schemas/2007#video />
<title type= text >Most Viewed</title>
<logo>http://www.youtube.com/img/pic_youtubelogo_123x63.gif</logo>
<link rel= alternate type= text/html href= http://www.youtube.com/browse?s=mp />
<link rel= http://schemas.google.com/g/2005#feed type= application/atom+xml
href= http://gdata.youtube.com/feeds/api/standardfeeds/most_viewed />
<link rel= self type= application/atom+xml
href= http://gdata.youtube.com/feeds/api/standardfeeds/most_viewed
?start-index=1&max-results=5 />
<link rel= next type= application/atom+xml
href= http://gdata.youtube.com/feeds/api/standardfeeds/most_viewed
?start-index=6&max-results=5 />
<author>
<name>YouTube</name>
<uri>http://www.youtube.com/</uri>
</author>
<generator version= beta uri= http://gdata.youtube.com/ >
YouTube data API</generator>
<openSearch:totalResults>94</openSearch:totalResults>
<openSearch:startIndex>1</openSearch:startIndex>
<openSearch:itemsPerPage>5</openSearch:itemsPerPage>
<entry>
<id>http://gdata.youtube.com/feeds/api/videos/dMH0bHeiRNg</id>
<published>2006-04-06T14:30:53.000-07:00</published>
<updated>2008-03-12T00:22:25.000-07:00</updated>
<category scheme= http://gdata.youtube.com/schemas/2007/keywords.cat
term= Dancing />
<category scheme= http://schemas.google.com/g/2005#kind
term= http://gdata.youtube.com/schemas/2007#video />
<category scheme= http://gdata.youtube.com/schemas/2007/keywords.cat
term= comedy />
<category scheme= http://gdata.youtube.com/schemas/2007/categories.cat
term= Comedy label= Comedy />
<title type= text >Evolution of Dance</title>
<content type= text >The funniest 6 minutes you will ever see!
Remember how many of these you have done!
Judson Laipply is dancing -
http://www.evolutionofdance.com -
for more info including song list!</content>
<link rel= alternate type= text/html
href= http://www.youtube.com/watch?v=dMH0bHeiRNg />
<link rel= http://gdata.youtube.com/schemas/2007#video.responses
type= application/atom+xml
href= http://gdata.youtube.com/feeds/api/videos/dMH0bHeiRNg/responses />
<link rel= http://gdata.youtube.com/schemas/2007#video.related
type= application/atom+xml
href= http://gdata.youtube.com/feeds/api/videos/dMH0bHeiRNg/related />
<link rel= self type= application/atom+xml
href= http://gdata.youtube.com/feeds/api/standardfeeds/most_viewed/dMH0bHeiRNg />
<author>
<name>judsonlaipply</name>
<uri>http://gdata.youtube.com/feeds/api/users/judsonlaipply</uri>
</author>
<media:group>
<media:title type= plain >Evolution of Dance</media:title>
<media:description type= plain >The funniest 6 minutes you will ever see!
Remember how many of these you have done!
Judson Laipply is dancing -
http://www.evolutionofdance.com -
for more info including song list!</media:description>
<media:keywords>comedy, Dancing</media:keywords>
<yt:duration seconds= 360 />
<media:category label= Comedy
scheme= http://gdata.youtube.com/schemas/2007/categories.cat >Comedy
</media:category>
<media:content
url= http://www.youtube.com/v/dMH0bHeiRNg type= application/x-shockwave-flash
medium= video isDefault= true expression= full duration= 360 yt:format= 5 />
<media:content
url= rtsp://rtsp2.youtube.com/ChoLENy73wIaEQnYRKJ3bPTBdBMYDSANFEgGDA==
/0/0/0/video.3gp type= video/3gpp medium= video expression= full duration= 360
yt:format= 1 />
<media:content
url= rtsp://rtsp2.youtube.com/ChoLENy73wIaEQnYRKJ3bPTBdBMYESARFEgGDA==
/0/0/0/video.3gp type= video/3gpp medium= video expression= full duration= 360
yt:format= 6 />
<media:player url= http://www.youtube.com/watch?v=dMH0bHeiRNg />
<media:thumbnail
url= http://img.youtube.com/vi/dMH0bHeiRNg/2.jpg height= 97 width= 130
time= 00:03:00 />
<media:thumbnail
url= http://img.youtube.com/vi/dMH0bHeiRNg/1.jpg height= 97 width= 130
time= 00:01:30 />
<media:thumbnail
url= http://img.youtube.com/vi/dMH0bHeiRNg/3.jpg height= 97 width= 130
time= 00:04:30 />
<media:thumbnail
url= http://img.youtube.com/vi/dMH0bHeiRNg/0.jpg height= 240 width= 320
time= 00:03:00 />
</media:group>
<yt:statistics viewCount= 78060679 favoriteCount= 400468 />
<gd:rating min= 1 max= 5 numRaters= 276123 average= 4.65 />
<gd:comments>
<gd:feedLink href= http://gdata.youtube.com/feeds/api/videos/dMH0bHeiRNg
/comments countHint= 124130 />
</gd:comments>
</entry>
<entry>
<id>http://gdata.youtube.com/feeds/api/videos/cQ25-glGRzI</id>
<published>2007-02-27T15:08:01.000-08:00</published>
<updated>2008-03-12T00:46:25.000-07:00</updated>
...
</entry>
</feed>