
1. Get the third Title of the Chapter with id="test." Use an absolute
   XPath expression. Use the abbrieviated notation.

   /Book/Contents/Chapter[@id='test']/Title[3]


2. Rework your XPath expression from (1); use the expanded notation.

   /child::Book/child::Contents/child::Chapter[attribute::id='test']/child::Title[position() = 3]

