'Sort of addendum to Card.__init__ to set the appropriate internal
attributes if the card was determined to be a RVKC.'

def _init_rvkc(self, keyword, field_specifier, field, value):

    keyword_upper = keyword.upper()
    self._keyword = '.'.join((keyword_upper, field_specifier))
    self._rawkeyword = keyword_upper
    self._field_specifier = field_specifier
    self._value = _int_or_float(value)
    self._rawvalue = field
