Specifies the (required value) and
(penalty factor
in least squares minimization) for the inverse_target record with
the same index.
A special format index lower_value higher_value penalty is available
which allows for putting limits on targets; if the actual value is in between
the lower_value and higher_value it considered to be ok;
if the actual value is lower than lower_value than the lower value
becomes the target value and is imposed with the
factor; likewise
for higher_value.