A range rule keys both sides into the order SAS uses for a numeric variable, so a
range written in special missings means what SAS would mean by it: MINVAL .A with
MAXVAL .C accepts .B and rejects .D, a blank fails a floor of .A, and a number
sits above every missing - passing a floor of .A and failing a ceiling of .C.
Against a numeric bound the same order gives the obvious answer: a missing fails
MINVAL 1 and passes MAXVAL 100.
Replaces the "the range rules step aside for a missing value" wording.
dc
0b18658686