Creating an open-end part allowing only unique values
Problem
You want to create an open-end part which accepts only values which have not yet been recorded in the same field.
Solution
The following Test pound instruction offers this service:
Discussion
Let's say one question requests a file number and that no two cases in the data base can refer to the same file number.
The Test instruction above is triggered by question ANUMBER before any data are recorded in the data base (thereby avoiding duplicate file number data). The trigger condition is key here: