Dynamic Data

[gm9]

The answer to the issue you quoted is simple: That is not using dynamic data at all, the everquest2.exe modifies that element during runtime. There are many instances of that in the UI, although admittedly it has gotten much better over the years. If you see us refer to hardcoded behaviour on the forums that's what we mean.

As to your second question: That depends, it is different for every dynamic data object. For a select few it is actually documented in eq2ui_gamedata.xml, for all others it is trial and error.