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XPointer Basics

If you've been paying attention to this column over the past few weeks, you'll already be familiar with XPath and XLink, two important pieces of the XML jigsaw. XPath provides a standard way to access specific nodes (or sets of nodes) within an XML document, while XLink offers XML document authors the ability to link XML data together in a myriad of different ways.

http://www.devshed.com/c/a/XML/XPointer-Basics/4/