Extensions to XPath

• The goal is to express a range defined by the user
  • additional functions are defined
• A range may cross XML element boundaries
• For example:

   <p id="start">Start a selection here with the whole node content</p>

   <p>include this whole paragraph</p>

   <p>and this one</p>

   <p>but not this one!</p>

• This can be expressed by:

   xpointer(p[@id='start']/range-to(following::p[2]))

• Range can also be expressed within a text with string-range