Andrew Watt, XPath Essentials (Repost)

This book is a learn-by-doing book. It is for anybody who needs to start using XPath today. Throughout the chapters of this book, you will be shown example after example of working code that uses XPath. As you work through the text and the examples, I think you will find code that you can adapt or extend to your own needs and purposes. Because the primary use of XPath at the time of writing is with XSLT, many of the examples in this book are focused on transforming XML documents either to HTML/XHTML or to other XML formats.