question: public Element signXML ( Document doc , String certAlias , String algorithm , String idAttrName , String id , boolean includeCert , String xpath ) throws XMLSignatureException { return signXMLUsingKeyPass ( doc , certAlias , null , algorithm , idAttrName , id , includeCert , xpath ) ; }
target:  Sign part of the xml document referred by the supplied id attribute using enveloped signatures and use exclusive xml canonicalization.