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XPath is a language that revolves around the use of the Extensible Markup Language (XML) programming language. Using XPath, developers or others can get certain information from XML documents, including different values and variables, and the locations of specific elements within an XML document.
The World Wide Web Consortium (W3C), which operates extensive XPath resources, explains that users can take advantage of XPath to navigate XML documents. Using path expressions, this language selects nodes or sets of nodes in XML. A library of standard functions helps users to understand and work with elements and attributes of XML.
XPath is used in conjunction with other tools like Extensible Stylesheet Language (XSLT), as well as the XQuery and XPointer protocols, both of which are built on Xpath expressions.