XPath

XPath (XML Path Language) is a query language for selecting nodes and computing values from XML and HTML documents. In the context of web accessibility, XPath expressions are used by assistive technologies and accessibility tools to identify and target specific elements within a web page — for example, locating an image that needs alternative text or finding the main content region of a page. XPath is particularly important for external metadata systems and browser extensions that annotate or transform web content to improve accessibility, as it provides a precise way to reference elements without modifying the original document.