Storing Additional Character Value on Fusion Payables Invoice Page

Summary:

In our Fusion Payables on invoice screen page all the character attributes have been utilized, now we want to store another value as a character.

How can we store an additional value on page?

 

We thought of storing values in Number attribute and display character as a lookup meaning but that does work here like in OAF page, Oracle form or Standard Concurrent program window where you can pass number values as ID and display characters using value set from meaning column.

Let us know if this can be achieved using Sandbox, application composer,  UI Text or any dynamic EL expression etc.