validUri2 = "http://www.example.com";
validUri3 = "http://www.acme.com";
validPrefix1 = "";
validPrefix2 = "a";
validPrefix3 = "b";
ns1 = new BasicNamespace(validPrefix1, validUri1);
ns2 = new BasicNamespace(validPrefix1, validUri2);
ns3 = new BasicNamespace(validPrefix2, validUri1);
ns4 = new BasicNamespace(validPrefix2, validUri2);
ns5 = new BasicNamespace(validPrefix3, validUri3);
}