The following text is technical, and varies, such as
AWS/ASME-SFA A5.18 ER70S-6
AS/NZS 14341-B G 49A 3U C S6, G 49A 3U M S6
I could only see it working if it was possible to test in a very general sense if there was text there or not.
I know I could add label fields in Excel, but it's a pretty complex spresdsheet already and I was hoping to avoid adding more columns to it if possible. It's frustrating that this sort of conditional stuff is easy in something like Word but InDesign's merge functionality is practically unchanged from the it's origins in Pagemaker.