Perspective Tag History binding - collecting Duration On , on conditions of two Tags

[PGriffith]

In addition to all these other things, expression mode in a tag history binding doesn't work the way you're attempting to. The expression you author needs to return a well-formatted array of objects that describe the tags you want to return history for.

See the first bullet here:

Indirect Tag History Binding Expression

I think there's two fundamental things that you're missing, one of which is (in my opinion) really, really bad UX on our part. The 'Expression' mode for a tag history binding expects you to author an expression that returns a well formatted tag history configuration object. Since you currently cannot [1] create arbitrary array and object literals in expressions, your tag history binding expression must point to some other custom property literal. There's literally no other way to use expressi…