We all use classifications.
Some of us are use to keep archicad classification.
Finaly we all export ifc files.
I use Solibri Model Viewer on macOS.
With Solibri I can see my BIM model by Layer, by Containment, and by Component.
I wonder if it's possible to see my BIM model by class ?
I wonder where to find which classification was used for each ifc file into Solibri Model Viewer or other viewer ?
Someone more experienced in Solibri might correct me if I'm wrong, but the "Component" in Solibri is the best representation of your Archicad Classifications. So there are no "Archicad" Classifications that are exported directly to IFC.
Your "Classifications" from Archicad are translated into "IFC Types" through your selected IFC Translator. If you want to see/change how are they translated, you can open your IFC Translator, go to Type Mapping / Edit or Create New Preset / Map IFC Types for Export (that's for Archicad 22).