<book xmlns:its="http://www.w3.org/2005/11/its" its:version="2.0">
 <info>
  <its:rules version="2.0">
   <its:preserveSpaceRule selector="//verse" space="preserve"/>
  </its:rules>
 </info>
 <verse>
 'Twas brillig, and the slithy toves
  Did gyre and gimble in the wabe;
 All mimsy were the borogoves,
  And the mome raths outgrabe.
 </verse>
</book>
