this.client.insertDocument(TEST_COLLECTION_PATH, "doc3", document3);
String query = "//h:person[h:first='Sally' and h:last='Smith']/h:first";
Collection col = this.client.getCollection(TEST_COLLECTION_PATH);
XPathQueryService xpathservice = (XPathQueryService) col.getService("XPathQueryService", "1.0");
xpathservice.setNamespace("h", "http://example.net/person");
ResourceSet resultSet = xpathservice.query(query);
ResourceIterator results = resultSet.getIterator();
List res = asList(results);
assertEquals(1, res.size());