How to negate a boolean Indirect Tag binding?

Is there a way to directly negate the value of an Indirect Tag binding?

When using an Expression binding, it's simple to invert a boolean by using the !. However, I need to use an Indirect Tag binding to dynamically construct my tag path, and I would like the resulting boolean value to be negated.

Thanks for any tips!

Directly, no.

Make a custom property with indirect binding and use that property in your expression...