XPath

XPath traverses an XML document's tree structure to describe node sets in an XML document. XPath uses pattern-matching to find sets of elements (for example, <note>Text</note>).

XPath is a W3C standard and is used in XSLT.

The following figure shows XPath expressions in an XSLT document.

Related concepts
CSS (Cascading StyleSheet)
Stylesheet
XSLT (eXtensible Stylesheet Language Transformations)
Related information
http://www.w3c.org