When you use the new interface to export floor slabs, roofs, and openings to the IFC 2x3 format, be sure to note the following changes in the QuantitySets:

The quantities (geometric data and quantity data) of floor slabs, which used to be in the SlabBaseQuantities QuantitySet, are now in the AllplanQuantities PropertySet. These quantities are not included in the IFC standard; they are additionally provided by Allplan. The quantities of the IFC standard are still included in the SlabQuantities QuantitySet.

So that the names of the QuantitySets are more consistent, RoofQuantities replaces RoofBaseQuantities for roofs, and OpeningElementQuantities replaces OpeningElementBaseQuantities for openings.