Attributing different classification depending on condition

[nerconerco]

Hello!

I am fairly new to creating logic expressions to automatically apply properties for IFC exports.
I have to give all construction elements a 'Typname' parameter for which I am using the Composite's name.

Typname = Composite's name

But for beams and other profiles I can't extract it from Composites since they don't have any, so I'm trying to have beams use another parameter, for example Element ID. I try so with the following:

IF ( Layer <> "025 Beams", Composite, Element-ID )

But this expression only applies a value to every layer that is not the one I wrote, and seems to be unable to apply Element-ID to the exception.

Any thoughts on how to fix this? It seems simple enough but my logic won't allow me to solve it myself.

 

[nerconerco]

Follow-up:
I was able to get my results by creating two 'expressions', one based on Composites (walls and slabs) and a second one based on Profiles (Beams etc.).
I realise I can't quite explain how it works but it yields the results I need for the moment.