// verify
Iterator<SignaturePart> spIter = si.getSignatureParts().iterator();
assertTrue(spIter.hasNext());
SignaturePart sp = spIter.next();
boolean valid = sp.validate();
assertTrue(valid);
SignatureDocument sigDoc = sp.getSignatureDocument();
String declareNS =
"declare namespace xades='http://uri.etsi.org/01903/v1.3.2#'; "