Import IFC Data (new interface) provides more new features:

• When importing IFC data, you can find the new Import all components as user-defined archit. Elements option in the Advanced options in the IFC Export, Import Settings dialog box. Use this option if your work requires only the geometries of the components. Attributes are retained; the “intelligence” of the components is lost. This option is not selected by default.
• Allplan no longer imports components grouped as an IfcElementAssembly (such as IfcReinforcingBars) as user-defined architectural elements but as an element group of original elements. When the Import all components as user-defined archit. elements option is selected, Allplan transfers the grouped components as an element group of user-defined architectural elements.
• Allplan imports the following profile types: IfcIShapeProfile and IfcAsymmetricIShapeProfile.
• Allplan imports sweep solids or sweep surfaces of which the profiles are defined as IfcTrapeziumProfileDef.