XPathEvaluator.
XPathExpression interface represents a parsed and resolved XPath expression.
XPathNamespace interface is returned by
XPathResult interfaces to represent the XPath namespace node type that DOM lacks.
XPathNSResolver interface permit
prefix strings in the expression to be properly bound to
namespaceURI strings.
XPathResult interface represents the result of the evaluation of an XPath 1.0 expression within the context of a particular node.