Some index types support further fine selection - either generic or a range of values. This field contains the generic key specification or the lower limit of the range, regardless of whether you specify an upper limit. For example, in the case of customer matchcode 'D' (index type M, index ID), you could enter:
A..BC
If you do not specify an upper limit, the system selects all records where the sort field (1st field in matchcode structure) begins with A and the city (3rd field in matchcode structure) with BC. If you enter an upper limit such as
U..XY
the system selects all records that are generically greater than or equal to the lower limit and smaller than and equal to the upper limit.
Table matchcodes also allow you to specify the argument for reading the ATAB table generically or specifying the lower and upper limit.