tests/conf/select/select69.xml

<?xml version="1.0"?> 
<doc>
  <a squish="light" squash="butternut">1</a>
  <a squeesh="" squish="extreme">2</a>
  <a squash="butternut" squeesh="">3</a>
  <a squish="heavy" squash="sport" squeesh="">4</a>
</doc>