| The dataset this feature refers to. parent is only applicable if used in an evaluation group. | |||
| on | off | Whether the expression should be linearized at the linearization point. Applicable only if evalmethod is harmonic. | ||
| on | off | |||
| on | off | |||
| manual | parent | If data is a local dataset with nontrivial data and the feature is part of an evaluation group, specify solutions manually or take them from the parent evaluation group. | ||
| The units to use for the expressions in expr. If the old unit is not valid when the expression changes, the unit property is reset to default.  |