Return Result Set - V5R4

Do I need to use a MODS to return a result set from an RPG program
(V5R4) or can I use arrays within a DS? IOW, if I use this:

Exec SQL SET RESULT SETS ARRAY :MyReturnData FOR :MyCount ROWS;

Can MyReturnData be this:

D myReturnData...
D DS
D WOArray Dim(100)
D WOTran 16 0 Overlay(WOArray)
D WOINVTH 2 0 Overlay(WOArray:*Next)
D WOMA 1 Overlay(WOArray:*Next)

Or does it have to be this:

DMyReturnData...
D DS Occurs(100)
D WOTran 16 0
D WOINVTH 2 0
D WOMA 1
D WOINVT 2

Thanks!