@property
    def rawkeyword(self):

        if self._rawkeyword is not None:
            return self._rawkeyword
        elif self.field_specifier is not None:
            self._rawkeyword = self.keyword.split('.', 1)[0]
            return self._rawkeyword
        else:
            return self.keyword
On record-valued keyword cards this is the name of the standard <= 8
dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/card.py/Card.rawkeyword