XOM API for Processing XML with Java

["Michael Kay" <mike AT saxonica.com>]

> 3. I've added a new XPathTypeException subclass of 
> XPathException. This 
> is thrown when an XPath expression returns something other than a 
> node-set. It provides a getReturnValue method that returns the raw 
> object created by the XPath engine.

That's a weird design. To count how many empty paragraphs there are, I
evaluate the expression count(//para[not(node())]), catch the exception, and
extract the number?

Can you explain the thinking?

Michael Kay
http://www.saxonica.com/