Adding Tidy to VIM

I currently am using MarkLogic and by association use XML heavily in my job. I often get an XML file that is all jumbled into one line - a really long line. I knew that html/xml tidy could format this better so I installed tidy and added this mapping to my .vimrc file:

map <leader>x :%!tidy -i -q -xml -raw<CR>
  

I have <leader> mapped as my comma character so in normal mode I just press ,x and my xml is now all tidied up.