Inspecting application data has evolved a bit since the 5250 green-screen days.
Written by Robert Swanson
There once was a time in the midrange computing world when developers tasked with tracing the source of data showing on a particular application screen could follow a fairly rote process to identify it. With the primary interface being a 5250 green-screen, the developer could start by locating the DDS display file for the underlying screen, use SDA to find the appropriate record format and field name(s), and then look at the associated RPG code to see how those particular display fields are populated. He or she could then begin making program adjustments as needed.