code: private static boolean isCharacterInC0orC1Range(char ch)
      {
          if(ch == 0x09 || ch == 0x0A || ch == 0x0D)
          	return false;
          else        	    	
          	return (ch >= 0x7F && ch <= 0x9F)|| (ch >= 0x01 && ch <= 0x1F);
      }
docs: This method checks if a given character is between C0 or C1 range
  of Control characters.
  This method is added to support Control Characters for XML 1.1
  If a given character is TAB (0x09), LF (0x0A) or CR (0x0D), this method
  return false. Since they are whitespace characters, no special processing is needed.
  
  @param ch
  @return boolean