
RANGE

The RANGE symbol, -, is used in GROUP expressions.  It is used to
specify a range of consecutive category numbers.
discarding others.

operation:   (using the group operator as examples)
    (GROUP 3-5 (soils))
    (GROUP 1005-1234 (elevation))
    (GROUP 2-5 8-11 (geology))

aliases:
    rng     range     RNG     RANGE
