public static boolean exists(final String url){
  return XAdES132.equals(url) || XAdES111.equals(url) || XAdES122.equals(url)|| XAdES.equals(url);
}

public static boolean exists ( final String url ) { return XAdES132 . equals ( url ) || XAdES111 . equals ( url ) || XAdES122 . equals ( url ) || XAdES . equals ( url ) ; }
checks if the url is related to xades namespace . xades141 is excluded from this test as it concerns only the archive timestamp .
