s----sq------srt----rtr---t1
t2
inthis flow take two sequence generaters and connect to
s0rter t/f like this
nextvalue descending order enable
nextvalue1 asending order enable
for example if 6 records contain
the sort result would be
nextvalue nextvalue1
6 1
5 2
4 3
3 4
2 5
1 6
sorter contain these ports and remaing ports next pass these
ports to ruter t/f
nextvalue > nextvalue1 1st condition ---it give 1st 3rows
nextvalue < nextvalue1 2nd cond ---- it gives last 3 rows