def _validate_isvalid_composition(self, isvalid_composition, field, value):
        """Checks for valid specification of composition.

        Args:
            isvalid_composition (bool): flag from schema indicating
                composition to be checked.
            field (str): 'composition'
            value (dict): dictionary of composition

        The rule's arguments are validated against this schema:
            {'isvalid_composition': {'type': 'bool'}, 'field': {'type': 'str'},
             'value': {'type': 'dict'}}
        """
        sum_amount = 0.0
        if value['kind'] in ['mass fraction', 'mole fraction']:
            low_lim = 0.0
            up_lim = 1.0
            total_amount = 1.0
        elif value['kind'] in ['mole percent']:
            low_lim = 0.0
            up_lim = 100.0
            total_amount = 100.0
        else:
            self._error(field, 'composition kind must be "mole percent", "mass fraction", or '
                        '"mole fraction"')
            return False

        for sp in value['species']:
            amount = sp['amount'][0]
            sum_amount += amount

            # Check that amount within bounds, based on kind specified
            if amount < low_lim:
                self._error(field, 'Species ' + sp['species-name'] + ' ' +
                            value['kind'] + ' must be greater than {:.1f}'.format(low_lim)
                            )
            elif amount > up_lim:
                self._error(field, 'Species ' + sp['species-name'] + ' ' +
                            value['kind'] + ' must be less than {:.1f}'.format(up_lim)
                            )

        # Make sure mole/mass fraction sum to 1
        if not np.isclose(total_amount, sum_amount):
            self._error(field, 'Species ' + value['kind'] +
                        's do not sum to {:.1f}: '.format(total_amount) +
                        '{:f}'.format(sum_amount)
                        )
Checks for valid specification of composition.

        Args:
            isvalid_composition (bool): flag from schema indicating
                composition to be checked.
            field (str): 'composition'
            value (dict): dictionary of composition

        The rule's arguments are validated against this schema:
            {'isvalid_composition': {'type': 'bool'}, 'field': {'type': 'str'},
             'value': {'type': 'dict'}}