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public interface: XPathExpression [javadoc | source] The XPathExpression interface represents a parsed and resolved XPath expression.

See also the Document Object Model (DOM) Level 3 XPath Specification.
Method from org.w3c.dom.xpath.XPathExpression Summary:
Method from org.w3c.dom.xpath.XPathExpression Detail:
 public Object evaluate(Node contextNode,
    short type,
    Object result) throws XPathException, DOMException
    Evaluates this XPath expression and returns a result.