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XPath

The XML path language (XPath) is used to address parts of an XML document. The XML document is considered to be a tree of nodes and an XPath expression selects a specific node or set of nodes within the tree. This is achieved by defining the path to the node or nodes. An XPath expression in addition can include instructions to manipulate values held at a specific node or set of nodes. XPath is used with XSLT, discussed previously, as well as other XML technologies.

Detailed information about XPath can be found at:

http://www.w3.org/TR/xpath

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