Element b = doc.createElementNS("http://www.b.com/", "b:bar");
a.appendChild(b);
XPath xpath = new DOMXPath("/a:foo/b:bar/namespace::*/parent::*");
SimpleNamespaceContext context1 = new SimpleNamespaceContext();
context1.addNamespace("a", "http://www.a.com/");
context1.addNamespace("b", "http://www.b.com/");
xpath.setNamespaceContext(context1);
List result = xpath.selectNodes(doc);
assertEquals(1, result.size());
assertEquals(b, result.get(0));