Type the expression and specify whether it is case-sensitive.
Type the displayed data. For example, if you are creating
an expression for ID numbers, type a sample ID number. This data
is used for reference purposes only and will not appear elsewhere
in the product.
Test the expression against an actual data. For example,
if the expression is for a national ID, type a valid ID number in
the Test data text box, click Test, and then
check the result.
Click Save if you are satisfied
with the result.
Note
Save the settings only if the testing was successful.
An expression that cannot identify any data wastes system resources
and may impact performance.