Informatica Expression IIF

Question

I have this set of codes in my Informatica expression

IIF(V_TR = 'TT'
OR
V_TR = 'TV'
OR
V_TR = 'VC'
OR
V_TR = 'TI'
OR
V_TR = 'TL'
OR
V_TR = 'NC'
OR
V_TR = 'CE'
OR
V_TR = 'D1'
OR
V_TR = 'DM'
OR
V_TR = 'N1'
OR
V_TR = 'NA'
OR
V_TR= 'U1'
OR
V_TR = 'UA', 'Y', 'N')

I know what the code means but what exactly does it do in the expression? DOes it serve as a filter to filter out all these values?

Answer 1

Without more context of what the expression and business needs of the expression it will be impossible to give more than guesses.

The 2 main ideas I can think of are:

The Y or N value are used later in a filter transform
The Y or N value is the desired output value based upon the input ports given the expression.

Answer 2

Filter the all records