Mine

xml.instruct! :xml, :version=>"1.0", :encoding=>"UTF-8"

xml.rss "version" => "2.0", "xmlns:dc" => "http://purl.org/dc/elements/1.1/" do
 xml.channel do

   xml.title       "Untitled.com News"
   xml.link        url_for :only_path => false, :controller => 'news'
   xml.description "The latest happenings on the website."

   @news.each do |new|
     xml.item do
       xml.title       new.title
       xml.link        url_for :only_path => false, :controller => 'news', :action => 'show', :id => new.id
       xml.description new.body
       xml.guid        url_for :only_path => false, :controller => 'news', :action => 'show', :id => new.id
     end
   end

 end
end