XML TutorialLesson 13Free preview

XML XPath

This lesson is part of XML · All levels

Summary

XPath is a query language for specifying parts of an XML document based on a path pattern. With expressions like /store/book/title, we can pick specific elements from the tree structure without looking manually. XPath is very important because it is also used by XSLT, XQuery, and many XML processing libraries.

Key points

XPath specifies the path to the node in an XML document
The expression starts from the root with/or relative to //
XPath supports predicates such as [1] or [@price>100]
The result of a query is called a node-set, string, number, or boolean
XPath became the basis of XSLT and many XML tools

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