[xml] remove a xml file

["Y. Peng" <pengy muss cis mcmaster ca>]

Hi list, 

I am trying to remove a xml format file in current directory. I am
wondering if there is a standard function in libxml does this. And, if
I just want to rename a xml file without modifying its contents, which
function I could use? 
Thanks for your attention. 

regards,

Yuan