<book>
 <info>
  <its:rules xmlns:its="http://www.w3.org/2005/11/its" 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>
