For the second form of the syntax, the range of cases for which
observations are to be constructed are given explicitly as the pair of
integers 
. This form of the syntax must be used if there are no
data-carriers in the definition part from which a selection of
cases can be made. For example, to assign the same scalar to a data
quantity for a range of cases, we would use a syntax similar to
This second form of the syntax differs from the first form only in this regard: that an explicit range of values is given rather than deduced. Hence, if there are data quantities (data vectors) in the definition part, these are treated as in the first form of the syntax.
