Xpath and Xpointer: Locating Content in XML Documents

 Referring to specific information inside an XML document is a little like finding a needle in a haystack: how do you differentiate the information you need from everything else? XPath and XPointer are two closely related languages that play a key role in XML processing by allowing developers to find these needles and manipulate embedded information. XPath describes a route for finding specific items by defining a path through the hierarchy of an XML document, abstracting only the information that's relevant for identifying the data. XPointer extends XPath to identify more complex parts of documents. Written for XML and XSLT developers and anyone else who needs to address information in XML documents, the book assumes a working knowledge of XML and XSLT. By the time you've finished the book, you'll know how to construct a full XPointer (one that uses an XPath location path to address document content) and completely understand both the XPath and XPointer features it uses. 

Title Xpath and Xpointer: Locating Content in XML Documents
Author(s) John E. Simpson
Publisher: O'Reilly Media; 1 edition (July 31, 2002)
Paperback 208 pages
Language: English
ISBN-10: 0596002912
ISBN-13: 978-0596002916
eBook: http://commons.oreilly.com/wiki/index.php/XPath_and_XPointer