question: public static Element createElementInEncryption11Space ( Document doc , String elementName ) { if ( doc == null ) { throw new RuntimeException ( "Document is null" ) ; } if ( ( xenc11Prefix == null ) || ( xenc11Prefix . length ( ) == 0 ) ) { return doc . createElementNS ( EncryptionConstants . EncryptionSpec11NS , elementName ) ; } return doc . createElementNS ( EncryptionConstants . EncryptionSpec11NS , xenc11Prefix + ":" + elementName ) ; }
target:  Creates an Element in the XML Encryption 1.1 specification namespace.