A_B.appendChild(A_C);
log.debug("Created document");
Canonicalizer20010315OmitComments c = new Canonicalizer20010315OmitComments();
System.out.println(new String(c.engineCanonicalizeSubTree(doc)));
XMLSignature sig = new XMLSignature(doc, "", XMLSignature.ALGO_ID_MAC_HMAC_SHA1);
A_A.appendChild(sig.getElement());
Transforms transforms = new Transforms(doc);