Example model:

Example use case:
Select elements in 3D view (single or rubberband selection), treeview, or text input search criteria:

Write file with selected elements:

Load split file with the extracted elements:

Elements can be selected in the 3D view, the tree view, or through text search in their attributes, and the selected elements can be exported to a new IFC file.
This enables efficient splitting of large IFC files—for example, by building storey, element type, or specific attributes and property set values.