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