#data
<media:keywords xmlns:media="http://search.yahoo.com/mrss/">abc</media:keywords>
#errors

#data
<media:keywords xmlns:media="http://search.yahoo.com/mrss">abc</media:keywords>
#errors
/keywords;element not defined;m

#data
<media:thumbnail url="http://x/" xmlns:media="http://search.yahoo.com/mrss/"/>
#errors

#data
<media:thumbnail url="http://x/" xmlns:media="http://search.yahoo.com/mrss"/>
#errors
/thumbnail;element not defined;m
/thumbnail/@url;attribute not defined;m

#data
<media:thumbnail url="http:[]//x/" xmlns:media="http://search.yahoo.com/mrss/"/>
#errors
/thumbnail/@url;syntax error:iriref3987;m

#data
<media:thumbnail url="http:[]//x/" xmlns:media="http://search.yahoo.com/mrss"/>
#errors
/thumbnail;element not defined;m
/thumbnail/@url;syntax error:iriref3987;m
/thumbnail/@url;attribute not defined;m