I see that "range" is being used to indicate valid range on most numeric parameters, e.g.
32-bit integer, range [0, 2,147,483,647]
32-bit integer, range [1, 2,147,483,647]
The smaller valid range for pagesize
is described in the summary but could also be included in the spec, e.g
32-bit signed integer, range [1, 100]