Answer Posted / naresh

XPath (XML Path Language) is a language for selecting nodes
from an XML document. In addition, XPath may be used to
compute values (strings, numbers, or boolean values) from
the content of an XML document. XPath was defined by the
World Wide Web Consortium, W3C.

The XPath language is based on a tree representation of the
XML document, and provides the ability to navigate around
the tree, selecting nodes by a variety of criteria. In
popular use (though not in the official specification), an
XPath expression is often referred to simply as an XPath.

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