getting the value from tables and insert into the field in PI.

Hi friends,

I have a query in mapping part. I have Target field "Item allowance".There is no source field for mapping to this field.

But i need display the value for this field.

Here I am getting the data from different tables and validate the data and final result will pass to "Item allowances".

So please tell me the best solution for this scenario.

Thanks,

G.Bhanuprakash