The Tor Browser / file revision

 <?xml version="1.0" encoding="UTF-8"?>

 <!DOCTYPE whatever PUBLIC "-//MOZ//WHATEVER//EN" "http://mozilla.org/ns/foo">

 <foo xmlns="htp://mozilla.org/ns">

   <baz/><!-- a comment -->

   <bar> &lt;robots&gt; &amp; &lt;aliens&gt;

     <mozilla> a a a a a éèàùûî</mozilla>

     <firefox>Lorem ip<!-- aaa -->sum dolor sit amet, consectetuer

       adipiscing elit. Nam eu sapien. Sed viverra lacus. Donec quis

       ipsum. Nunc cursus aliquet lectus. Nunc vitae eros. Class aptent

       taciti sociosqu ad litora torquent per conubia nostra, per

       inceptos hymenaeos. Nam tellus massa, fringilla aliquam, fermentum

       sit amet, posuere ac, est. Duis tristique egestas ligula. Mauris

       quis felis. Fusce a ipsum non lacus posuere aliquet. Sed fermentum

       posuere nulla. Donec tempor. Donec sollicitudin tortor lacinia

       libero ullamcorper laoreet. Cras quis nisi at odio consectetuer

       molestie.</firefox>

     <?xml-foo "hey" ?>

   </bar>

   <!-- a comment 

          on several lines-->

   <?xml-foo "another pi on two lines"  

               example="hello"?>

 </foo>